Merge branch 'master' into production

2024-11-27 17:45:40 -05:00 · 2015-11-11 05:53:17 -08:00 · 2015-11-11 05:53:17 -08:00 · 6bf61dab39
commit 6bf61dab39
parent f2f307f3ad 0dc0b51556
68 changed files with 2624 additions and 1367 deletions
--- a/README.md
+++ b/README.md
@ -31,6 +31,7 @@ Whether you're novice or pro, the CodeCombat team is ready to help you implement
 ![Catherine Weresow](http://codecombat.com/images/pages/about/cat_small.png)
 ![Maka Gradin](https://dl.dropboxusercontent.com/u/138899/GitHub%20Wikis/avatars/Maka%20Gradin/maka_gradin_100.png)
 ![Rob Blanckaert](https://dl.dropboxusercontent.com/u/138899/GitHub%20Wikis/avatars/Rob%20Blanckaert/rob_blanckaert_100.png)
+![Josh Callebaut](https://dl.dropboxusercontent.com/u/138899/GitHub%20Wikis/avatars/Josh%20Callebaut/josh_callebaut_100.png)
 ![Michael Schmatz](http://codecombat.com/images/pages/about/michael_small.png)
 ![Josh Lee](http://codecombat.com/images/pages/about/josh_small.png)
 ![Alex Cotsarelis](https://dl.dropboxusercontent.com/u/138899/GitHub%20Wikis/avatars/Alex%20Cotsarelis/alex_100.png)
--- a/app/assets/images/pages/about/josh_c_small.png
+++ b/app/assets/images/pages/about/josh_c_small.png
--- a/app/core/Router.coffee
+++ b/app/core/Router.coffee
@ -66,8 +66,9 @@ module.exports = class CocoRouter extends Backbone.Router
    'courses/mock1/enroll/:courseID': go('courses/mock1/CourseEnrollView')
    'courses/mock1/:courseID': go('courses/mock1/CourseDetailsView')
    'courses': go('courses/CoursesView')
-    'courses/students': go('courses/CoursesView')
-    'courses/teachers': go('courses/CoursesView')
+    'courses/students': go('courses/StudentCoursesView')
+    'courses/teachers': go('courses/TeacherCoursesView')
+    'courses/purchase': go('courses/PurchaseCoursesView')
    'courses/enroll(/:courseID)': go('courses/CourseEnrollView')
    'courses/:courseID(/:courseInstanceID)': go('courses/CourseDetailsView')

@ -97,7 +98,7 @@ module.exports = class CocoRouter extends Backbone.Router

    'github/*path': 'routeToServer'

-    'hoc': go('courses/CoursesView')
+    'hoc': go('courses/HourOfCodeView')

    'i18n': go('i18n/I18NHomeView')
    'i18n/thang/:handle': go('i18n/I18NEditThangTypeView')
--- a/app/core/d3_utils.coffee
+++ b/app/core/d3_utils.coffee
@ -0,0 +1,128 @@
+# Caller needs require 'vendor/d3'
+
+module.exports.createContiguousDays = (timeframeDays, skipToday=true) ->
+  # Return list of last 'timeframeDays' contiguous days in yyyy-mm-dd format
+  days = []
+  currentDate = new Date()
+  currentDate.setUTCDate(currentDate.getUTCDate() - timeframeDays)
+  currentDate.setUTCDate(currentDate.getUTCDate() - 1) if skipToday
+  for i in [0...timeframeDays]
+    currentDay = currentDate.toISOString().substr(0, 10)
+    days.push(currentDay)
+    currentDate.setUTCDate(currentDate.getUTCDate() + 1)
+  days
+
+module.exports.createLineChart = (containerSelector, chartLines) ->
+  # Creates a line chart within 'containerSelector' based on chartLines
+  return unless chartLines?.length > 0 and containerSelector
+
+  margin = 20
+  keyHeight = 20
+  xAxisHeight = 20
+  yAxisWidth = 40
+  containerWidth = $(containerSelector).width()
+  containerHeight = $(containerSelector).height()
+
+  yScaleCount = 0
+  yScaleCount++ for line in chartLines when line.showYScale
+  svg = d3.select(containerSelector).append("svg")
+    .attr("width", containerWidth)
+    .attr("height", containerHeight)
+  width = containerWidth - margin * 2 - yAxisWidth * yScaleCount
+  height = containerHeight - margin * 2 - xAxisHeight - keyHeight * chartLines.length
+  currentLine = 0
+  currentYScale = 0
+
+  # Horizontal guidelines
+  marks = (Math.round(i * height / 5) for i in [1..5])
+  yRange = d3.scale.linear().range([height, 0]).domain([0, height])
+  svg.selectAll(".line")
+    .data(marks)
+    .enter()
+    .append("line")
+    .attr("x1", margin + yAxisWidth * yScaleCount)
+    .attr("y1", (d) -> margin + yRange(d))
+    .attr("x2", margin + yAxisWidth * yScaleCount + width)
+    .attr("y2", (d) -> margin + yRange(d))
+    .attr("stroke", 'gray')
+    .style("opacity", "0.3")
+
+  for line in chartLines
+    # continue unless line.enabled
+    xRange = d3.scale.linear().range([0, width]).domain([d3.min(line.points, (d) -> d.x), d3.max(line.points, (d) -> d.x)])
+    yRange = d3.scale.linear().range([height, 0]).domain([line.min, line.max])
+
+    # x-Axis
+    if currentLine is 0
+      startDay = new Date(line.points[0].day)
+      endDay = new Date(line.points[line.points.length - 1].day)
+      xAxisRange = d3.time.scale()
+        .domain([startDay, endDay])
+        .range([0, width])
+      xAxis = d3.svg.axis()
+        .scale(xAxisRange)
+      svg.append("g")
+        .attr("class", "x axis")
+        .call(xAxis)
+        .selectAll("text")
+        .attr("dy", ".35em")
+        .attr("transform", "translate(" + (margin + yAxisWidth) + "," + (height + margin) + ")")
+        .style("text-anchor", "start")
+
+    if line.showYScale
+      # y-Axis
+      yAxisRange = d3.scale.linear().range([height, 0]).domain([line.min, line.max])
+      yAxis = d3.svg.axis()
+        .scale(yRange)
+        .orient("left")
+      svg.append("g")
+        .attr("class", "y axis")
+        .attr("transform", "translate(" + (margin + yAxisWidth * currentYScale) + "," + margin + ")")
+        .style("color", line.lineColor)
+        .call(yAxis)
+        .selectAll("text")
+        .attr("y", 0)
+        .attr("x", 0)
+        .attr("fill", line.lineColor)
+        .style("text-anchor", "start")
+      currentYScale++
+
+    # Key
+    svg.append("line")
+      .attr("x1", margin)
+      .attr("y1", margin + height + xAxisHeight + keyHeight * currentLine + keyHeight / 2)
+      .attr("x2", margin + 40)
+      .attr("y2", margin + height + xAxisHeight + keyHeight * currentLine + keyHeight / 2)
+      .attr("stroke", line.lineColor)
+      .attr("class", "key-line")
+    svg.append("text")
+      .attr("x", margin + 40 + 10)
+      .attr("y", margin + height + xAxisHeight + keyHeight * currentLine + (keyHeight + 10) / 2)
+      .attr("fill", line.lineColor)
+      .attr("class", "key-text")
+      .text(line.description)
+
+    # Path and points
+    svg.selectAll(".circle")
+      .data(line.points)
+      .enter()
+      .append("circle")
+      .attr("transform", "translate(" + (margin + yAxisWidth * yScaleCount) + "," + margin + ")")
+      .attr("cx", (d) -> xRange(d.x))
+      .attr("cy", (d) -> yRange(d.y))
+      .attr("r", 2)
+      .attr("fill", line.lineColor)
+      .attr("stroke-width", 1)
+      .attr("class", "graph-point")
+      .attr("data-pointid", (d) -> "#{line.lineID}#{d.x}")
+    d3line = d3.svg.line()
+      .x((d) -> xRange(d.x))
+      .y((d) -> yRange(d.y))
+      .interpolate("linear")
+    svg.append("path")
+      .attr("d", d3line(line.points))
+      .attr("transform", "translate(" + (margin + yAxisWidth * yScaleCount) + "," + margin + ")")
+      .style("stroke-width", line.strokeWidth)
+      .style("stroke", line.lineColor)
+      .style("fill", "none")
+    currentLine++
--- a/app/core/services/stripe.coffee
+++ b/app/core/services/stripe.coffee
@ -6,6 +6,10 @@ module.exports = handler = StripeCheckout.configure({
  email: me.get('email')
  image: "https://codecombat.com/images/pages/base/logo_square_250.png"
  token: (token) ->
+    console.log 'trigger?', handler.trigger
+    handler.trigger 'received-token', { token: token }
    Backbone.Mediator.publish 'stripe:received-token', { token: token }
  locale: 'auto'
 })
+
+_.extend(handler, Backbone.Events)
--- a/app/core/utils.coffee
+++ b/app/core/utils.coffee
@ -248,3 +248,39 @@ module.exports.getPrepaidCodeAmount = getPrepaidCodeAmount = (price=999, users=0
  return 0 unless users > 0 and months > 0
  total = price * users * months
  total
+
+module.exports.filterMarkdownCodeLanguages = (text) ->
+  currentLanguage = me.get('aceConfig')?.language or 'python'
+  excludedLanguages = _.without ['javascript', 'python', 'coffeescript', 'clojure', 'lua', 'io'], currentLanguage
+  exclusionRegex = new RegExp "```(#{excludedLanguages.join('|')})\n[^`]+```\n?", 'gm'
+  text.replace exclusionRegex, ''
+
+module.exports.aceEditModes = aceEditModes =
+  'javascript': 'ace/mode/javascript'
+  'coffeescript': 'ace/mode/coffee'
+  'python': 'ace/mode/python'
+  'clojure': 'ace/mode/clojure'
+  'lua': 'ace/mode/lua'
+  'io': 'ace/mode/text'
+
+module.exports.initializeACE = (el, codeLanguage) ->
+  contents = $(el).text().trim()
+  editor = ace.edit el
+  editor.setOptions maxLines: Infinity
+  editor.setReadOnly true
+  editor.setTheme 'ace/theme/textmate'
+  editor.setShowPrintMargin false
+  editor.setShowFoldWidgets false
+  editor.setHighlightActiveLine false
+  editor.setHighlightActiveLine false
+  editor.setBehavioursEnabled false
+  editor.renderer.setShowGutter false
+  editor.setValue contents
+  editor.clearSelection()
+  session = editor.getSession()
+  session.setUseWorker false
+  session.setMode aceEditModes[codeLanguage]
+  session.setWrapLimitRange null
+  session.setUseWrapMode true
+  session.setNewLineMode 'unix'
+  return editor
--- a/app/locale/en.coffee
+++ b/app/locale/en.coffee
@ -603,8 +603,8 @@
    rob_blurb: "Codes things and stuff"
    josh_c_title: "Game Designer"
    josh_c_blurb: "Designs games"
-    carlos_title: "Region Manager"
-    carlos_blurb: "CodeCombat Brazil"
+    carlos_title: "Region Manager, Brazil"
+    carlos_blurb: "Celery Man"

  teachers:
    more_info: "More Info for Teachers"
--- a/app/locale/uk.coffee
+++ b/app/locale/uk.coffee
@ -1,6 +1,6 @@
 module.exports = nativeDescription: "Українська", englishDescription: "Ukrainian", translation:
  home:
-    slogan: "Навчіться програмувати, граючи у гру"
+    slogan: "Навчіться програмувати граючи"
    no_ie: "На жаль, CodeCombat не працює в IE8 та старіших версіях!" # Warning that only shows up in IE8 and older
    no_mobile: "CodeCombat не призначений для мобільних пристроїв і може не працювати!" # Warning that shows up on mobile devices
    play: "Грати" # The big play button that opens up the campaign view.
@ -31,7 +31,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    contact: "Контакти"
    twitter_follow: "Фоловити"
    teachers: "Учителям"
-#    careers: "Careers"
+    careers: "Робота"

  modal:
    close: "Закрити"
@ -74,7 +74,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    anonymous: "Гравець-анонім"
    level_difficulty: "Складність: "
    campaign_beginner: "Кампанія для початківців"
-    awaiting_levels_adventurer_prefix: "Ми випускаємо 5 рівнів на тиждень." # {change}
+    awaiting_levels_adventurer_prefix: "Ми щотижня додаємо нові рівні."
    awaiting_levels_adventurer: "Увійди як Шукач пригод"
    awaiting_levels_adventurer_suffix: "стань одним з перших, хто їх спробує."
    adjust_volume: "Підлаштувати гучність"
@ -84,12 +84,12 @@ module.exports = nativeDescription: "Українська", englishDescription:
 #    campaign_old_multiplayer_description: "Relics of a more civilized age. No simulations are run for these older, hero-less multiplayer arenas."

  share_progress_modal:
-    blurb: "Ви робите великі успіхи! Розкажіть кому-небудь, як багато ви вивчили з CodeCombat." # {change}
+    blurb: "У тебе гарно виходить! Розкажи своїм батькам як багато ти знаєш завдяки CodeCombat."
    email_invalid: "Невірна електронна адреса."
    form_blurb: "Введіть їхні електронні адреси, і ми покажемо ім!"
    form_label: "Електронна адреса"
    placeholder: "електронна адреса"
-    title: "Досконала робота, Учень"
+    title: "Досконала робота, учню"

  login:
    sign_up: "створення акаунту"
@ -161,7 +161,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    withdrawn: "Відкликано"
    accept: "Прийняти"
    reject: "Відхилити"
-#    withdraw: "Withdraw"
+    withdraw: "Відкликати"
    submitter: "Відправник"
    submitted: "Відправлено"
    commit_msg: "Доручити повідомлення"
@ -343,7 +343,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    tip_free_your_mind: "Нео, ти повинен усе подолати. Страх... сумніви і невіра. Звільни від них свій розум. - Морфіус"
    tip_strong_opponents: "Навіть наймогутніший суперник має свою слабкість. - Ітачі Учіха"
    tip_paper_and_pen: "Перш ніж почати програмувати, ви завжди можете спробувати з аркушем паперу і ручкою."
-#    tip_solve_then_write: "First, solve the problem. Then, write the code. - John Johnson"
+    tip_solve_then_write: "Спершу вирішуй проблему, а потім - пиши код. - Джон Джонсон"

  game_menu:
    inventory_tab: "Інвентар"
@ -404,9 +404,9 @@ module.exports = nativeDescription: "Українська", englishDescription:

  subscribe:
    comparison_blurb: "Відточіть свої навички завдяки підписці на CodeCombat!"
-    feature1: "Більше 60 основних рівней на просторах 4 світів" # {change}
-    feature2: "7 могутніх <strong>нових героїв</strong> з унікальними здібностями!" # {change}
-    feature3: "Більше 30 бонусних рівнів" # {change}
+    feature1: "Більше 110 основних рівней на просторах 4 світів"
+    feature2: "10 могутніх <strong>нових героїв</strong> з унікальними здібностями!"
+    feature3: "Більше 80-ти бонусних рівнів"
    feature4: "<strong>3500 бонусних самоцвітів</strong> кожного місяця!"
    feature5: "Навчальні відеоролики"
    feature6: "Екслюзивна підтримка по електронній пошті"
@ -432,8 +432,8 @@ module.exports = nativeDescription: "Українська", englishDescription:
    parent_email_sent: "Лист відправлено!"
    parent_email_title: "Яка в твоїх батьків електронна адреса?"
    parents: "Батькам"
-    parents_title: "Ваша дитина вчитиметься програмувати." # {change}
-    parents_blurb1: "Разом з CodeCombat Ваша дитина писатиме реальний код. Почне з простих команд та поступово буде розвиватись до складніших тем."
+    parents_title: "Дорога мамо/батьку, ваша дитина вчиться програмувати. Чи допоможите ви їй продовжити цю спрову?" # {change}
+    parents_blurb1: "Разом з CodeCombat Ваша дитина писатиме реальний код. Почне з простих команд та поступово буде розвиватись до складніших тем." # {change} 
    parents_blurb1a: "Коп'ютерне програмування є необхідними вмінням, що ваша дитина беззаперечно використовуватиме у дорослому віці. До 2020 року 77% професій потребуватимуть базових навичок у програмному забезпечені, а програмісти надзвичайно потрібні у всьому світі. Чи знали ви, що Комп'ютерні Науки - це найбільш високооплачувана університетьська спеціальність?"
    parents_blurb2: "За 9.99$ на місяць, вона отримуватиме нові завдання щотижня та персональні листи підтримки від професійних програмістів." # {change}
    parents_blurb3: "Жодного ризику: 100% гарантія повернення грошей, легке скасування абонементу одним кліком."
@ -455,7 +455,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    sale_continue: "Готовий продовжити пригоди?"
    sale_limited_time: "Обмежена пропозиція!"
    sale_new_heroes: "Нові герої!"
-#    sale_title: "Back to School Sale"
+    sale_title: "Дошкільні знижки"
    sale_view_button: "Купити 1 рік підписки на"
    stripe_description: "Щомісячний абонемент"
    stripe_description_year_sale: "1 рік підписки (35% знижка)"
@ -473,7 +473,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    managed_subs_desc_2: "Одержувачі повинні мати обліковий запис CodeCombat, пов'язаний з вказаною Вами адресою електронної пошти."
    group_discounts: "Групові знижки"
    group_discounts_1: "Ми також пропонуємо знижки для пакетних передплат."
-    group_discounts_1st: "1-ий абонемент (включає Ваш)" # {change}
+    group_discounts_1st: "1-ий абонемент"
    group_discounts_full: "Повна ціна"
    group_discounts_2nd: "2-11 абонементи"
    group_discounts_20: "Знижка 20%"
@ -485,7 +485,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    users_subscribed: "Підписані користувачі:"
    no_users_subscribed: "Користувачі не підписані, будь ласка, перевірте Ваші ел. адреси."
    current_recipients: "Поточні отримувачі"
-    unsubscribing: "Скасування передплати..." # {change}
+    unsubscribing: "Триває скасування підписки..."
    subscribe_prepaid: "Натисніть Підписатися щоб використовувати передплачені коди"
    using_prepaid: "Використати передплачений код для щомісячної підписки"

@ -583,15 +583,15 @@ module.exports = nativeDescription: "Українська", englishDescription:
    press_paragraph_1_link: "набору-для-преси"
    press_paragraph_1_suffix: ". Всі логотипи та зображення можна використовувати, не зв'язуючись із нами напряму."
    team: "Команда"
-    george_title: "Виконавчий директор" # {change}
+    george_title: "Співзасновник"
    george_blurb: "Бізнесмен"
-    scott_title: "Програміст" # {change}
+    scott_title: "Співзасновник"
    scott_blurb: "Розумник"
-    nick_title: "Програміст" # {change}
+    nick_title: "Співзасновник"
    nick_blurb: "Ґуру мотивації"
    michael_title: "Програміст"
    michael_blurb: "Сисадмін"
-    matt_title: "Програміст" # {change}
+    matt_title: "Співзасновник"
    matt_blurb: "Велосипедист"
    cat_title: "Головний ремісник"
    cat_blurb: "Маг повітря"
@ -603,7 +603,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    retrostyle_blurb: "Ігри в стилі ретро"

  teachers:
-#    more_info: "More Info for Teachers"
+    more_info: "Додаткова інформація для вчителів"
    intro_1: "CodeCombat - це онлайн гра, що вчить програмуванню. Студенти пишуть код на реальних мовах програмування."
    intro_2: "Досвід не потрібен!"
    free_title: "Скільки це коштує?"
@ -617,12 +617,12 @@ module.exports = nativeDescription: "Українська", englishDescription:
    teacher_subs_3: "щоб налаштувати підписку."
    sub_includes_title: "Що входить у підписку?"
    sub_includes_1: "На додаток до 110+ основних рівнів, студенти з щомісячною підпискою отримають доступ до цих додаткових функцій:"
-    sub_includes_2: "70 + рівнів практики" # {change}
+    sub_includes_2: "80+ рівнів практики"
    sub_includes_3: "Відео уроки"
    sub_includes_4: "Преміум підтримка по електронній пошті"
    sub_includes_5: "10 нових героїв з унікальними навичками для оволодіння"
-    sub_includes_6: "3500 бонусних дорогоцінних каменів кожен місяць"
-    sub_includes_7: "Приватні Клани"
+    sub_includes_6: "3500 бонусних самоцвітів кожен місяць"
+    sub_includes_7: "Приватні клани"
    monitor_progress_title: "Як мені стежити за прогресом студентів?"
    monitor_progress_1: "Прогрес студентів може бути відстежити, створивши"
    monitor_progress_2: "для вашого класу."
@ -651,8 +651,8 @@ module.exports = nativeDescription: "Українська", englishDescription:
    more_info_2: "вчительський форум"
    more_info_3: "є гарним місцем для спілкування із колегами-педагогами, котрі використовують CodeCombat."
    sys_requirements_title: "Системні вимоги"
-    sys_requirements_1: "Оскільки CodeCombat — це гра, для нормальної роботи він вимагає у комп'ютерів більше, ніж відео чи текстові посібники. Ми оптимізували його для швидкої роботи в усіх сучасних браузерах і на старіших машинах, щоб кожен міг грати. І ось наші підказки, як отримати від CodeCombat якнайбільше:" # {change}
-    sys_requirements_2: "Використовуйте новіші версії Chrome або Firefox." # {change}
+    sys_requirements_1: "Сучасний веб-переглядач. Остання версія Chrome, Firefox або Safari. Internet Explorer 9 та вище."
+    sys_requirements_2: "CodeCombat наразі не підтримується на iPad."

  teachers_survey:
    title: "Анкета вчителя"
@ -727,8 +727,8 @@ module.exports = nativeDescription: "Українська", englishDescription:
    admin: "Aдмін"
    new_password: "Новий пароль"
    new_password_verify: "Підтвердження паролю"
-    type_in_email: "Введіть свій email, щоб підтвердити вилучення" # {change}
-    type_in_password: "Так само введіть ваш пароль."
+    type_in_email: "Введіть свій email, аби підтвердити вилучення екаунту."
+    type_in_password: "Також, введіть свій пароль."
    email_subscriptions: "Email-підписки"
    email_subscriptions_none: "Жодних підписок."
    email_announcements: "Оголошення"
@ -840,16 +840,16 @@ module.exports = nativeDescription: "Українська", englishDescription:
    last_played: "Остання гра"
    leagues_explanation: "Грайте в лізі проти інших членів клану на мультіплєєрній арені."
 #    track_concepts1: "Track concepts"
-#    track_concepts2a: "learned by each student"
-#    track_concepts2b: "learned by each member"
+    track_concepts2a: "вивчено усіма студентами"
+    track_concepts2b: "вивчено усіма учасниками"
 #    track_concepts3a: "Track levels completed for each student"
 #    track_concepts3b: "Track levels completed for each member"
 #    track_concepts4a: "See your students'"
 #    track_concepts4b: "See your members'"
-#    track_concepts5: "solutions"
+    track_concepts5: "рішення"
 #    track_concepts6a: "Sort students by name or progress"
 #    track_concepts6b: "Sort members by name or progress"
-#    track_concepts7: "Requires invitation"
+    track_concepts7: "Потребує запрошення"
 #    track_concepts8: "to join"
 #    private_require_sub: "Private clans require a subscription to create or join."

@ -1183,11 +1183,11 @@ module.exports = nativeDescription: "Українська", englishDescription:
    rules: "Правила"
    winners: "Переможці"
    league: "Ліга"
-#    red_ai: "Red AI" # "Red AI Wins", at end of multiplayer match playback
-#    blue_ai: "Blue AI"
-#    wins: "Wins" # At end of multiplayer match playback
-#    humans: "Red" # Ladder page display team name
-#    ogres: "Blue"
+    red_ai: "Червоний ШІ" # "Red AI Wins", at end of multiplayer match playback
+    blue_ai: "Синій ШІ"
+    wins: "переміг" # At end of multiplayer match playback
+    humans: "Червоний" # Ladder page display team name
+    ogres: "Синій"

  user:
    stats: "Статистика"
@ -1258,22 +1258,22 @@ module.exports = nativeDescription: "Українська", englishDescription:
    retrying: "Помилка сервера, повторна спроба."
    success: "Успішно оплачено. Дякуємо!"

-#  account_prepaid:
+  account_prepaid:
 #    purchase_code: "Purchase a Subscription Code"
 #    purchase_code1: "Subscription Codes can be redeemed to add premium subscription time to one or more CodeCombat accounts."
 #    purchase_code2: "Each CodeCombat account can only redeem a particular Subscription Code once."
 #    purchase_code3: "Subscription Code months will be added to the end of any existing subscription on the account."
-#    users: "Users"
-#    months: "Months"
-#    purchase_total: "Total"
+    users: "Користувачі"
+    months: "Місяці"
+    purchase_total: "Загалом"
 #    purchase_button: "Submit Purchase"
 #    your_codes: "Your Codes"
 #    redeem_codes: "Redeem a Subscription Code"
 #    prepaid_code: "Prepaid Code"
 #    lookup_code: "Lookup prepaid code"
-#    apply_account: "Apply to your account"
+    apply_account: "Застосувати до свого екаунту"
 #    copy_link: "You can copy the code's link and send it to someone."
-#    quantity: "Quantity"
+    quantity: "Кількіть"
 #    redeemed: "Redeemed"
 #    no_codes: "No codes yet!"

@ -1350,12 +1350,12 @@ module.exports = nativeDescription: "Українська", englishDescription:
    arrays: "Масиви"
    basic_syntax: "Базовий синтаксис"
    boolean_logic: "Булева логіка"
-#    break_statements: "Break Statements"
+    break_statements: "Оператори зупинки"
    classes: "Класи"
-#    continue_statements: "Continue Statements"
+    continue_statements: "Оператори продовження"
    for_loops: "Цикл For"
    functions: "Функції"
-#    graphics: "Graphics"
+    graphics: "Графіка"
    if_statements: "Умовні оператори"
    input_handling: "Обробка введення"
    math_operations: "Математичні операції"
@ -1490,7 +1490,7 @@ module.exports = nativeDescription: "Українська", englishDescription:
    next_photo: "додайте необов’язкове професійне фото."
    next_active: "відзначте що Ви у пошуках пропозицій, щобвідображатися у пошуку."
    example_blog: "Блог"
-    example_personal_site: "Особиста Сторінка"
+    example_personal_site: "Персональний сайт"
    links_header: "Особисті Посилання"
    links_blurb: "Посилання на інші сторінки або профілі, які б ви хотіли вказати. Наприклад: аккаунт на GitHub'і, LinkedIn, або ваш блог. "
    links_name: "Назва посилання"
--- a/app/models/Classroom.coffee
+++ b/app/models/Classroom.coffee
@ -0,0 +1,7 @@
+CocoModel = require './CocoModel'
+schema = require 'schemas/models/classroom.schema'
+
+module.exports = class Classroom extends CocoModel
+  @className: 'Classroom'
+  @schema: schema
+  urlRoot: '/db/classroom'
--- a/app/models/Prepaid.coffee
+++ b/app/models/Prepaid.coffee
@ -12,3 +12,9 @@ module.exports = class Prepaid extends CocoModel
    for redeemer in @get('redeemers')
      return redeemer.date if redeemer.userID is userID
    return null
+    
+  initialize: ->
+    @listenTo @, 'add', ->
+      maxRedeemers = @get('maxRedeemers')
+      if _.isString(maxRedeemers)
+        @set 'maxRedeemers', parseInt(maxRedeemers)
--- a/app/schemas/models/classroom.schema.coffee
+++ b/app/schemas/models/classroom.schema.coffee
@ -0,0 +1,14 @@
+c = require './../schemas'
+
+ClassroomSchema = c.object {title: 'Classroom', required: ['name']}
+c.extendNamedProperties ClassroomSchema  # name first
+
+_.extend ClassroomSchema.properties,
+  members: c.array {title: 'Members'}, c.objectId()
+  ownerID: c.objectId()
+  description: {type: 'string'}
+  code: c.shortString(title: "Unique code to redeem")
+
+c.extendBasicProperties ClassroomSchema, 'Classroom'
+
+module.exports = ClassroomSchema
--- a/app/schemas/models/course.schema.coffee
+++ b/app/schemas/models/course.schema.coffee
@ -8,7 +8,8 @@ _.extend CourseSchema.properties,
  concepts: c.array {title: 'Programming Concepts', uniqueItems: true}, c.concept
  description: {type: 'string'}
  duration: {type: 'number', description: 'Approximate hours of content'}
-  pricePerSeat: {type: 'number', description: 'Price per seat in USD cents.'}
+  pricePerSeat: {type: 'number', description: 'Price per seat in USD cents.'} # deprecated
+  free: { type: 'boolean' }
  screenshot: c.url {title: 'URL', description: 'Link to course screenshot.'}

 c.extendBasicProperties CourseSchema, 'Course'
--- a/app/schemas/models/course_instance.schema.coffee
+++ b/app/schemas/models/course_instance.schema.coffee
@ -1,16 +1,23 @@
 c = require './../schemas'

-CourseInstanceSchema = c.object {title: 'Course Instance'}
+CourseInstanceSchema = c.object {
+  title: 'Course Instance'
+#  required: [
+#    'courseID', 'classroomID', 'members', 'ownerID', 'aceConfig'
+#  ]
+}

 _.extend CourseInstanceSchema.properties,
  courseID: c.objectId()
-  description: {type: 'string'}
+  classroomID: c.objectId()
+  description: {type: 'string'} # deprecated in favor of classrooms?
  members: c.array {title: 'Members'}, c.objectId()
-  name: {type: 'string'}
+  name: {type: 'string'} # deprecated in favor of classrooms?
  ownerID: c.objectId()
-  prepaidID: c.objectId()
+  prepaidID: c.objectId() # deprecated
  aceConfig:
    language: {type: 'string', 'enum': ['python', 'javascript']}
+  hourOfCode: { type: 'boolean' }

 c.extendBasicProperties CourseInstanceSchema, 'CourseInstance'

--- a/app/schemas/models/level_session.coffee
+++ b/app/schemas/models/level_session.coffee
@ -79,15 +79,15 @@ _.extend LevelSessionSchema.properties,
      currentScriptOffset:
        type: 'number'

-    selected:
+    selected:  # Not tracked any more, delete with old level types
      type: [
        'null'
        'string'
      ]
    playing:
-      type: 'boolean'  # Not tracked any more
+      type: 'boolean'  # Not tracked any more, delete with old level types
    frame:
-      type: 'number'  # Not tracked any more
+      type: 'number'  # Not tracked any more, delete with old level types
    thangs:   # ... what is this? Is this used?
      type: 'object'
      additionalProperties:
--- a/app/schemas/models/prepaid.schema.coffee
+++ b/app/schemas/models/prepaid.schema.coffee
@ -10,6 +10,7 @@ PrepaidSchema = c.object({title: 'Prepaid', required: ['creator', 'type']}, {
  code: c.shortString(title: "Unique code to redeem")
  type: { type: 'string' }
  properties: {type: 'object'}
+  exhausted: { type: 'boolean' }
 })

 c.extendBasicProperties(PrepaidSchema, 'prepaid')
--- a/app/schemas/models/user.coffee
+++ b/app/schemas/models/user.coffee
@ -320,6 +320,9 @@ _.extend UserSchema.properties,
    courseID: c.objectId({})
    courseInstanceID: c.objectId({})
  }
+  coursePrepaidID: c.objectId({
+    description: 'Prepaid which has paid for this user\'s course access'
+  })

 c.extendBasicProperties UserSchema, 'user'

--- a/app/styles/admin/analytics.sass
+++ b/app/styles/admin/analytics.sass
@ -14,3 +14,15 @@
    font-size: 70pt
  .description
    font-size: 8pt
+
+  .line-chart-container
+    height: 500px
+    width: 100%
+    .x.axis
+      font-size: 9pt
+      path
+        display: none
+    .y.axis
+      font-size: 9pt
+      path
+        display: none
--- a/app/styles/courses/courses-view.sass
+++ b/app/styles/courses/courses-view.sass
@ -0,0 +1,3 @@
+#courses-view
+  .row
+    margin-top: 40px
--- a/app/styles/courses/courses.sass
+++ b/app/styles/courses/courses.sass
@ -1,85 +0,0 @@
-#courses-view
-
-  .logged_out
-    font-size: 24px
-
-  .signup-button
-    background: red
-    color: white
-    font-size: 18px
-    font-variant: small-caps
-    line-height: 27px
-    text-transform: uppercase
-    margin-right: 20px
-
-  .login-button
-    background: white
-    color: black
-    font-size: 18px
-    font-variant: small-caps
-    line-height: 27px
-    text-transform: uppercase
-
-  .center
-    text-align: center
-
-  .code-input
-    width: 100%
-
-  .course-image
-    width: 100%
-
-  .course-panel
-    margin: 20px
-
-  .faq-blurb
-    font-size: 14px
-
-  .continue-dialog .modal-dialog
-    background-color: white
-    max-width: 400px
-
-    .instruction-label
-      font-size: 14pt
-    .or
-      margin-bottom: 20px
-      font-size: 14pt
-
-  .center
-    text-align: center
-
-  .concepts-container
-    width: 200px
-
-  .contact-container
-    margin-top: 20px
-    text-align: center
-
-  .info-container
-    margin: 0% 10%
-    font-size: 18px
-
-  .monitoring-img-container
-    margin-top: 10px
-
-  .praise-caption
-    font-size: 14px
-
-  .praise-quote
-    font-size: 20px
-    font-style: italic
-
-  .progress-container
-    font-size: 20px
-
-  .img-quote
-    height: 160px
-
-  .popover
-    z-index: 1050
-    min-width: 400px
-
-    h3
-      background: transparent
-      border: 0
-      font-size: 30px
--- a/app/styles/courses/hour-of-code-view.sass
+++ b/app/styles/courses/hour-of-code-view.sass
@ -0,0 +1 @@
+//#hour-of-code-view
--- a/app/styles/courses/student-courses-view.sass
+++ b/app/styles/courses/student-courses-view.sass
@ -0,0 +1 @@
+//#student-courses-view
--- a/app/styles/courses/teacher-courses-view.sass
+++ b/app/styles/courses/teacher-courses-view.sass
@ -0,0 +1,21 @@
+#teacher-courses-view
+  margin-bottom: 50px
+  
+  img.media-object
+    width: 300px
+  
+  #fixed-area
+    position: fixed
+    bottom: 0
+    left: 0
+    right: 0
+    
+    .well
+      margin-bottom: 0
+      padding: 5px
+    
+    .col-sm-5
+      padding-top: 8px
+      
+    .progress
+      margin-bottom: 0
--- a/app/styles/play/level.sass
+++ b/app/styles/play/level.sass
@ -72,7 +72,13 @@ $level-resize-transition-time: 0.5s
    width: 55%
    position: relative
    overflow: hidden
-    @include transition($level-resize-transition-time ease-out)
+    @include transition(all $level-resize-transition-time ease-out, z-index 1.2s linear)
+    z-index: 0
+
+    &.preview-overlay
+      z-index: 20
+      #goals-view
+        visibility: hidden
    
  canvas#webgl-surface
    background-color: #333
--- a/app/styles/play/level/loading.sass
+++ b/app/styles/play/level/loading.sass
@ -8,24 +8,48 @@
  background-position: top $backgroundPosition
  background-size: contain

+$UNVEIL_TIME: 1.2s
+
 #level-loading-view
  width: 100%
  height: 100%
  position: absolute
  z-index: 20
-  $UNVEIL_TIME: 1.2s

  &.unveiled
    pointer-events: none

-  .loading-details
+  &.preview-screen
+    background-color: rgba(0, 0, 0, 0.5)
+
+  .left-wing, .right-wing
+    width: 100%
+    height: 100%
+    position: absolute
+    pointer-events: none
+
+  .left-wing
+    @include wing-background('/images/level/loading_left_wing_1920.jpg', right)
+    @media screen and ( max-width: 1366px )
+      @include wing-background('/images/level/loading_left_wing_1366.jpg', right)
+    left: -50%
+    @include transition(all $UNVEIL_TIME ease)
+
+  .right-wing
+    @include wing-background('/images/level/loading_right_wing_1920.jpg', left)
+    @media screen and ( max-width: 1366px )
+      @include wing-background('/images/level/loading_right_wing_1366.jpg', left)
+    right: -50%
+    @include transition(all $UNVEIL_TIME ease)
+
+  #loading-details
    position: absolute
    top: 86px
-    left: 50%
+    right: 50%
    $WIDTH: 450px
    width: $WIDTH
    height: 450px
-    margin-left: (-$WIDTH / 2)
+    margin-right: (-$WIDTH / 2)
    z-index: 100
    background: transparent url(/images/level/code_editor_background.png) no-repeat
    background-size: 100% 100%
@ -34,9 +58,22 @@
    padding: 80px 80px 40px 80px
    text-align: center
    // http://matthewlein.com/ceaser/  Bounce down a bit, then snap up.
-    @include transition(top $UNVEIL_TIME cubic-bezier(0.285, -0.595, 0.670, -0.600))
+    @include transition($UNVEIL_TIME cubic-bezier(0.285, -0.595, 0.670, -0.600))
    font-family: 'Open Sans Condensed'

+    &.preview
+      top: 0
+      right: 0
+      margin-right: 0
+      width: 45%
+      height: auto
+      pointer-events: all
+      @include transition($UNVEIL_TIME ease-in-out)
+
+      padding: 80px 70px 40px 50px
+      .progress-or-start-container.intro-footer
+        bottom: 30px
+
    .level-loading-goals
      text-align: left

@ -49,12 +86,22 @@
        font-size: 20px
        color: black

+    .intro-doc
+      text-align: left
+      font-size: 16px
+      //overflow-y: scroll  // bad scroll bars
+      overflow: hidden
+
+      img
+        max-width: 100%
+
    .progress-or-start-container
      position: absolute
      bottom: 95px
-      width: 325px
      height: 80px
      left: 48px
+      right: 77px
+      @include transition(bottom $UNVEIL_TIME ease-out)

      .load-progress
        width: 100%
@ -131,21 +178,7 @@
      width: 401px
      color: #666

-  .left-wing, .right-wing
-    width: 100%
-    height: 100%
-    position: absolute
-
-  .left-wing
-    @include wing-background('/images/level/loading_left_wing_1920.jpg', right)
-    @media screen and ( max-width: 1366px )
-      @include wing-background('/images/level/loading_left_wing_1366.jpg', right)
-    left: -50%
-    @include transition(all $UNVEIL_TIME ease)
-
-  .right-wing
-    @include wing-background('/images/level/loading_right_wing_1920.jpg', left)
-    @media screen and ( max-width: 1366px )
-      @include wing-background('/images/level/loading_right_wing_1366.jpg', left)
-    right: -50%
-    @include transition(all $UNVEIL_TIME ease)
+    &.preview #tip-wrapper
+      left: 48px
+      right: 77px
+      width: auto
--- a/app/styles/play/menu/guide-view.sass
+++ b/app/styles/play/menu/guide-view.sass
@ -52,3 +52,14 @@
      border-image: url(/images/level/code_toolbar_submit_button_zazz_pressed.png) 14 20 20 20 fill round
      padding: 2px 0 0 2px
      color: white
+
+#guide-view
+  pre.ace_editor
+    padding: 2px 4px
+    border-radius: 4px
+    background-color: #f9f2f4
+    font-size: 12px
+    font-family: Monaco, Menlo, Ubuntu Mono, Consolas, "source-code-pro", monospace !important
+
+    .ace_cursor, .ace_bracket
+      display: none
--- a/app/templates/about.jade
+++ b/app/templates/about.jade
@ -185,7 +185,7 @@ block content
            p(data-i18n="about.rob_blurb")
              | Codes things and stuff.

-          img(src="/images/pages/about/placeholder.png").img-thumbnail
+          img(src="/images/pages/about/josh_c_small.png").img-thumbnail
          .team_bio
            h4.team_name
              | Josh Callebaut
@ -201,6 +201,6 @@ block content
            h4.team_name
              | Carlos Maia
            p(data-i18n="about.carlos_title")
-              | Region Manager
+              | Region Manager, Brazil
            p(data-i18n="about.carlos_blurb")
-              | CodeCombat Brazil
+              | Celery Man
--- a/app/templates/admin/administer-user-modal.jade
+++ b/app/templates/admin/administer-user-modal.jade
@ -31,7 +31,24 @@ block modal-body-content
        select.form-control#coupon-select
          for couponOption in coupons
            option(value=couponOption.id selected=coupon===couponOption.id)= couponOption.format
+    button#save-changes.btn.btn-primary Save Changes
+    
+  h3 Grant Prepaid for Courses
+  #prepaid-form.form
+    if view.state === 'creating-prepaid'
+      .progress.progress-striped.active
+        .progress-bar(style="width: 100%")
+      
+    else if view.state === 'made-prepaid'
+      .alert.alert-success Prepaid created!
+      
+    else
+      .form-group
+        label Seats
+        input#seats-input.form-control(type="number")
+      .form-group
+        button#add-seats-btn.btn.btn-primary Add Seats
            
 block modal-footer-content
-  button#save-changes.btn.btn-primary Save Changes
+  

--- a/app/templates/admin/analytics.jade
+++ b/app/templates/admin/analytics.jade
@ -2,6 +2,8 @@ extends /templates/base

 block content

+  //- NOTE: do not localize / i18n
+
  if me.isAdmin()
    .container-fluid
      .row
@ -18,6 +20,21 @@ block content
            div.description 30-day Active Users
            div.count= activeUsers[0].monthlyCount

+    h3 KPI 60 days
+    .kpi-recent-chart.line-chart-container
+
+    h3 KPI 300 days
+    .kpi-chart.line-chart-container
+
+    h3 Active Classes 90 days
+    .active-classes-chart.line-chart-container
+
+    h3 Recurring Revenue 90 days
+    .recurring-revenue-chart.line-chart-container
+
+    h3 Active Users 90 days
+    .active-users-chart.line-chart-container
+
    h1 Active Classes
    table.table.table-striped.table-condensed
      tr
--- a/app/templates/courses/course-details.jade
+++ b/app/templates/courses/course-details.jade
@ -32,11 +32,16 @@ block content
    h1(data-i18n="common.loading") Loading...
  else
    h1
-      if courseInstance.get('name')
-        | #{courseInstance.get('name')}
-      else
-        span(data-i18n='courses.unnamed_class')
-      small.spl (#{course.get('name')})
+      | #{course.get('name')}
+      small.spl
+        if courseInstance.get('name')
+          | (#{courseInstance.get('name')})
+        else if view.classroom.get('name')
+          | (#{view.classroom.get('name')})
+        else
+          | (
+          span(data-i18n='courses.unnamed_class')
+          | )
      
    if !view.owner.isNew()
      p
@ -48,18 +53,17 @@ block content
      if courseInstance.get('description')
        each line in courseInstance.get('description').split('\n')
          div= line
-    if adminMode && courseInstance
-      +settings-dialog
-      p
-        button.btn.btn-xs(data-toggle='modal', data-target='#settingsModal', data-i18n="courses.edit_settings")
+    // TODO: migrate these settings to classrooms
+    //if adminMode && courseInstance
+    //  +settings-dialog
+    //  p
+    //    button.btn.btn-xs(data-toggle='modal', data-target='#settingsModal', data-i18n="courses.edit_settings")

    div.well.well-sm(role='tabpanel')
      ul.nav.nav-pills(role='tablist')
        if adminMode
          li.active(role='presentation')
            a(href='#progress', aria-controls='progress', role='tab', data-toggle='tab', data-i18n="courses.progress")
-          li(role='presentation')
-            a(href='#invite', aria-controls='invite', role='tab', data-toggle='tab', data-i18n="courses.add_students")
          li(role='presentation')
            a(href='#levels', aria-controls='levels', role='tab', data-toggle='tab', data-i18n="nav.play")
        else
@ -71,8 +75,6 @@ block content
      if adminMode
        .tab-pane.active#progress(role='tabpanel')
          +progress-tab
-        .tab-pane#invite(role='tabpanel')
-          +invite-tab
        .tab-pane#levels(role='tabpanel')
          +levels-tab
      else
@ -261,28 +263,6 @@ mixin progress-members-popup-started(i, level)
    if adminMode
      strong(data-i18n="clans.view_solution")

-mixin invite-tab
-  p(data-i18n="courses.invite_students")
-  h3(data-i18n="courses.invite_link_header")
-  p(data-i18n="courses.invite_link_p_1")
-  .alert.alert-info
-    strong= document.location.origin + "/courses/students?_ppc=" + view.prepaid.get('code')
-  p(data-i18n="courses.invite_link_p_2")
-  .form
-    .form-group
-      textarea#invite-emails-textarea.form-control
-      .help-block(data-i18n="courses.enter_emails")
-    .form-group
-      button#invite-btn.btn.btn-success(data-i18n="courses.send_invites")
-      #invite-emails-sending-alert.alert.alert-info.hide(data-i18n="common.sending")
-      #invite-emails-success-alert.alert.alert-success.hide(data-i18n="play_level.done")
-
-  if view.prepaid.loaded && pricePerSeat > 0
-    h3 Class Capacity
-    p
-      span.spr(data-i18n="courses.capacity_used")
-      span #{view.prepaid.get('redeemers').length} / #{view.prepaid.get('maxRedeemers')}.
-
 mixin levels-tab
  table.table.table-striped.table-condensed
    thead
--- a/app/templates/courses/courses-view.jade
+++ b/app/templates/courses/courses-view.jade
@ -0,0 +1,12 @@
+extends /templates/base
+
+block content
+
+  h1.text-center Welcome to CodeCombat Courses
+  
+  .row
+    .col-sm-6.text-center
+      a(href="/courses/students").btn.btn-default Students Click Here
+      
+    .col-sm-6.text-center
+      a(href="/courses/teachers").btn.btn-default Teachers Click Here
--- a/app/templates/courses/courses.jade
+++ b/app/templates/courses/courses.jade
@ -1,236 +0,0 @@
-extends /templates/base
-
-block content
-
-  div(style='border-bottom: 1px solid black')
-    span *UNDER CONSTRUCTION, please send feedback to
-    a.spl(href='mailto:team@codecombat.com') team@codecombat.com
-
-  br
-  
-  .hidden-md.hidden-lg
-    .alert.alert-danger Courses not supported on mobile devices.
-      
-  .hidden-xs.hidden-sm
-    if state === 'enrolling'
-      .alert.alert-info Enrolling in course..
-    else if state === 'ppc_logged_out'
-      .alert.alert-danger.logged_out Create account or log in to join this course.
-      button.btn.btn-sm.btn-primary.header-font.signup-button(data-i18n="login.sign_up")
-      button.btn.btn-sm.btn-default.header-font.login-button(data-i18n="login.log_in")
-    else
-      if state === 'unknown_error'
-        .alert.alert-danger.alert-dismissible= stateMessage
-  
-      if hocLandingPage
-        +hoc-landing
-      else
-        if view.courseInstances.size()
-          +course-instance-list
-
-        if studentMode
-          +student-main
-        else 
-          if hocMode
-            +teacher-hoc
-          else
-            +teacher-main
-        .container-fluid
-          - var i = 0
-          while i < courses.length
-            .row
-              +course-block(courses[i], instances)
-              - i++
-              if i < courses.length
-                +course-block(courses[i], instances)
-                - i++
-    
-
-mixin hoc-landing
-  h1.center Welcome to CodeCombat's Hour of Code!
-  br
-  .container-fluid
-    .row
-      .col-md-6.center
-        button.btn.btn-lg.btn-success.btn-student(data-i18n="courses.students_click")
-      .col-md-6.center
-        button.btn.btn-lg.btn-default.btn-teacher(data-i18n="courses.teachers_click")
-        
-mixin course-instance-list
-  h1.center Courses You Are In
-  .row
-    .col-md-10.col-md-offset-1
-      .list-group
-        for courseInstance in view.courseInstances.models
-          - var course = view.courses.get(courseInstance.get('courseID'));
-          .list-group-item
-            .list-group-item-heading
-              h3
-                a(href="/courses/#{course.id}/#{courseInstance.id}")
-                  span.spr #{courseInstance.get('name')}
-                  small (#{course.get('name')})
-              p= courseInstance.get('description')
-
-mixin student-main
-  button.btn.btn-warning.btn-teacher(data-i18n="courses.teachers_click")
-  h1.center(data-i18n="courses.courses_on_coco")
-
-mixin teacher-hoc
-  button.btn.btn-warning.btn-student(data-i18n="courses.students_click")
-  h1.center Welcome to CodeCombat's Hour of Code!
-  p
-    strong How to use CodeCombat with your students:
-    ol
-      li Click the green 'Get FREE course' button below
-      li Follow the enrollment instructions
-      li Add students via the 'Add Students' tab
-  p 
-    span.spr If you have any problems, please email
-    a(href='mailto:team@codecombat.com') team@codecombat.com
-  br
-
-mixin teacher-main
-  button.btn.btn-warning.btn-student(data-i18n="courses.students_click")
-  h1.center(data-i18n="courses.courses_on_coco")
-  .info-container
-    p(data-i18n="courses.designed_to")
-    .container-fluid
-      .row
-        .col-md-6
-          ul
-            li(data-i18n="courses.more_in_less")
-            li(data-i18n="courses.no_experience")
-            li(data-i18n="courses.easy_monitor")
-
-          p(data-i18n="courses.purchase_for_class")
-          p.faq-blurb
-            span.spr(data-i18n="courses.see_the")
-            a.courses-faq(data-i18n="courses.faq")
-            span.spl(data-i18n="courses.more_info")
-        .col-md-6
-          img.img-quote(src="/images/pages/courses/coco_complab.png")
-    p
-      .well.well-sm
-        div.praise-quote "#{praise.quote}"
-        div.praise-caption - #{praise.source}
-
-  //- h1.center(data-i18n="courses.free_trial")
-  //- .info-container
-  //-   p
-  //-     span.spr(data-i18n="teachers.teacher_subs_1")
-  //-     a(href='/teachers/freetrial', data-i18n="teachers.teacher_subs_2")
-  //-     span.spl(data-i18n="courses.get_access")
-
-  h2.center(data-i18n="courses.choose_course")
-
-mixin student-dialog(course)
-  .modal.continue-dialog(id="continueModal#{course.id}")
-    .modal-dialog
-      .modal-header
-        button.close(data-dismiss='modal')
-          span &times;
-        h3.modal-title= course.get('name')
-      .modal-body
-        .container-fluid
-          .row.button-row
-            .col-md-12
-              .well.well-sm
-                p
-                  div.instruction-label(data-i18n="courses.enter_code")
-                .container-fluid
-                  .row.student-dialog-state-row
-                    .col-md-12
-                      if view.state === 'enrolling-by-modal'
-                        .progress.progress-striped.active
-                          .progress-bar(style="width: 100%")
-                      else if view.state === 'unknown_error'
-                        .alert.alert-danger= view.stateMessage
-                  .row
-                    .col-md-8
-                      input.code-input(type='text', data-course-id="#{course.id}", data-i18n="[placeholder]courses.enter_code1", placeholder="Enter unlock code")
-                    .col-md-4
-                      button.btn.btn-success.btn-enroll(data-course-id="#{course.id}", data-i18n="courses.enroll")
-                  if hocMode && course.get('pricePerSeat') === 0 || me.isAdmin()
-                    .row.button-row.center.row-pick-class
-                      .col-md-12
-                        br
-                        div.or(data-i18n="courses.or")
-                    .row.button-row.center
-                      .col-md-12
-                        button.btn.btn-success.btn-lg.btn-hoc-student-continue(data-course-id="#{course.id}") Continue by yourself
-
-mixin teacher-dialog(course)
-  .modal.continue-dialog(id="continueModal#{course.id}")
-    .modal-dialog
-      .modal-header
-        button.close(data-dismiss='modal')
-          span &times;
-        h3.modal-title= course.get('name')
-      .modal-body
-        .container-fluid
-          if enrolledCourses[course.id]
-            .row.button-row.row-pick-class
-              .col-md-12
-                .well.well-sm
-                  p
-                    div.instruction-label(data-i18n="courses.pick_from_classes")
-                  .container-fluid
-                    .row
-                      .col-md-8
-                        select.form-control.select-session(data-course-id="#{course.id}")
-                          each inst in instances
-                            if inst.get('courseID') == course.id
-                              if inst.get('name')
-                                option(value="#{inst.id}")= inst.get('name')
-                              else
-                                option(value="#{inst.id}", data-i18n="courses.unnamed")
-                      .col-md-4
-                        button.btn.btn-success.btn-enter(data-course-id="#{course.id}", data-i18n="courses.enter")
-            .row.button-row.center.row-pick-class
-              .col-md-12
-                div.or(data-i18n="courses.or")
-          .row.button-row.center
-            .col-md-12
-              if course.get('pricePerSeat') === 0 || me.isAdmin()
-                button.btn.btn-success.btn-lg.btn-buy(data-course-id="#{course.id}") Start new class
-              else
-                button.btn.btn-success.btn-lg.btn-buy(data-course-id="#{course.id}", data-i18n="courses.buy_course1")
-
-mixin course-block(course)
-  if studentMode
-    +student-dialog(course)
-  else
-    +teacher-dialog(course)
-  .col-md-6
-    .well.panel.course-panel(class=enrolledCourses[course.id] ? 'panel-success' : 'panel-info')
-      .panel-heading
-        .panel-title 
-          span.spr #{course.get('name')}
-          strong #{enrolledCourses[course.id] ? '[ enrolled ]' : ''}
-      .panel-body
-        .container-fluid
-          .row
-            .col-md-12
-              p
-               img.course-image(src="#{course.get('screenshot')}")
-          .row.button-row
-            .col-md-6
-              strong(data-i18n="courses.topics")
-              ul
-                each concept in course.get('concepts')
-                  li(data-i18n="concepts." + concept)
-              strong
-                span.spr(data-i18n="courses.hours_content")
-                span #{course.get('duration')}
-            .col-md-6.center(style='margin-top: 40px;')
-              if studentMode
-                if enrolledCourses[course.id]
-                  a.btn.btn-lg.btn-success.btn-continue(href="/courses/#{course.id}?student=true", data-i18n="common.continue")
-                else
-                  button.btn.btn-lg.btn-success.btn-continue(data-toggle='modal', data-target="#continueModal#{course.id}", data-i18n="courses.enter") Enter
-              else if enrolledCourses[course.id]
-                button.btn.btn-lg.btn-success.btn-continue(data-toggle='modal', data-target="#continueModal#{course.id}", data-i18n="common.continue")
-              else if course.get('pricePerSeat') === 0 || me.isAdmin()
-                button.btn.btn-lg.btn-success.btn-buy(data-course-id="#{course.id}", data-i18n='courses.get_free')
-              else
-                button.btn.btn-lg.btn-success.btn-buy(data-course-id="#{course.id}", data-i18n='courses.buy_course')
--- a/app/templates/courses/hour-of-code-view.jade
+++ b/app/templates/courses/hour-of-code-view.jade
@ -0,0 +1,11 @@
+extends /templates/base
+
+block content
+  h1.text-center Welcome to CodeCombat's Hour of Code!
+  br
+  .container-fluid
+    .row
+      .col-md-6.text-center
+        button#student-btn.btn.btn-lg.btn-success(data-i18n="courses.students_click")
+      .col-md-6.text-center
+        a.btn.btn-lg.btn-default(data-i18n="courses.teachers_click", href="/courses/teachers?hoc=true")
--- a/app/templates/courses/invite-to-classroom-modal.jade
+++ b/app/templates/courses/invite-to-classroom-modal.jade
@ -0,0 +1,22 @@
+extends /templates/core/modal-base
+
+block modal-header-content
+  h2 Invite Students to Classroom
+  h3= view.classroom.get('name')
+
+block modal-body-content
+  p(data-i18n="courses.invite_students")
+  h3(data-i18n="courses.invite_link_header")
+  p(data-i18n="courses.invite_link_p_1")
+  .alert.alert-info
+    
+    strong= document.location.origin + "/courses/students?_cc=" + view.classroom.get('code')
+  p(data-i18n="courses.invite_link_p_2")
+  .form
+    .form-group
+      textarea#invite-emails-textarea.form-control
+      .help-block(data-i18n="courses.enter_emails")
+    .form-group
+      button#send-invites-btn.btn.btn-success(data-i18n="courses.send_invites")
+      #invite-emails-sending-alert.alert.alert-info.hide(data-i18n="common.sending")
+      #invite-emails-success-alert.alert.alert-success.hide(data-i18n="play_level.done")
--- a/app/templates/courses/purchase-courses-view.jade
+++ b/app/templates/courses/purchase-courses-view.jade
@ -0,0 +1,41 @@
+extends /templates/base
+
+block content
+
+  if view.state === 'purchasing'
+    p.text-center Purchasing...
+    .progress.progress-striped.active
+      .progress-bar(style="width: 100%")
+    
+  else if view.state === 'purchased'
+    p Thank you for your purchase! You can now assign (more) students to paid courses.
+    
+    p.text-center
+      a(href="/courses/teachers") Return to course management.
+      
+  else
+    h3.text-center Purchase Courses for Students
+    
+    if view.state === 'error'
+      .alert.alert-danger= view.stateMessage
+    
+    .form-horizontal
+      .form-group
+        label.col-sm-3.control-label Students
+        .col-sm-6
+          input#students-input.form-control(
+            placeholder='<number of seats>'
+            value=view.numberOfStudents
+            type='number'
+          )
+          .help-block Each student will have access to all courses. 
+          
+      #price-form-group.form-group
+        label.col-sm-3.control-label Price
+        .col-sm-6
+          .form-control-static
+            | #{view.getPriceString()} ($#{view.pricePerStudent.toFixed(2)} per student)
+  
+      .form-group
+        .col-sm-offset-3.col-sm-10
+          button#purchase-btn.btn.btn-primary Purchase
--- a/app/templates/courses/student-courses-view.jade
+++ b/app/templates/courses/student-courses-view.jade
@ -0,0 +1,70 @@
+extends /templates/base
+
+block content
+
+  p To join a class, ask your teacher for an unlock code.
+  
+  #join-classroom-form.form-horizontal
+    .form-group
+      .col-sm-2
+        button#join-class-btn.btn.btn-default.btn-block(disabled=view.state==='enrolling') Join Class
+      .col-sm-6
+        input#classroom-code-input.form-control(
+          placeholder='<enter unlock code here>',
+          value=view.classCode,
+          disabled=view.state==='enrolling')
+        
+    if view.state === 'enrolling'
+      .progress.progress-striped.active
+        .progress-bar(style="width: 100%") Joining class
+      
+    if view.state === 'unknown_error'
+      .alert.alert-danger= view.stateMessage
+    
+    - var justJoinedCourseInstance = view.courseInstances.find(function(ci) { return ci.justJoined; });
+    if justJoinedCourseInstance
+      - var course = view.courses.get(justJoinedCourseInstance.get('courseID'));
+      - var classroom = view.classrooms.get(justJoinedCourseInstance.get('classroomID'));
+      if course && classroom
+        .alert.alert-info
+          span.spr Successfully joined "#{classroom.get('name')}"!
+          a(href="/courses/#{course.id}/#{justJoinedCourseInstance.id}") 
+            strong Click here to start taking "#{course.get('name')}".
+     
+  .panel.panel-default
+    .panel-heading
+      .panel-title My Courses
+      
+    .list-group
+      .list-group-item
+        .row
+          .col-sm-3
+            strong Classroom
+          .col-sm-3
+            strong Course
+      for courseInstance in view.courseInstances.models
+        - var classroom = view.classrooms.get(courseInstance.get('classroomID'))
+        - var course = view.courses.get(courseInstance.get('courseID'))
+        if !(classroom && course)
+          - continue;
+
+        .list-group-item
+          .row
+            .col-sm-3
+              if classroom
+                | #{classroom.get('name')}
+            .col-sm-3
+              if course
+                | #{course.get('name')}
+            .col-sm-6
+              a.btn.btn-default.btn-sm(href="/courses/#{course.id}/#{courseInstance.id}") Enter
+        
+  .panel.panel-default
+    .panel-heading
+      .panel-title My Classes
+    .list-group
+      for classroom in view.classrooms.models
+        .list-group-item
+          .row
+            .col-sm-3= classroom.get('name')
+            .col-sm-9= classroom.get('description')
--- a/app/templates/courses/teacher-courses-view.jade
+++ b/app/templates/courses/teacher-courses-view.jade
@ -0,0 +1,178 @@
+extends /templates/base
+
+block content
+
+  if view.hoc
+    h1 Welcome to Hour of Code!
+    
+    p
+      | Thank you for choosing CodeCombat for your students.
+      span.spr.spl To get your kids started, simply send them to
+      a(href="/hoc") https://codecombat.com/hoc
+      span .
+    
+    p
+      | If you'd like to use our courses system to view their progress:
+    
+    ol
+      li Login/create your account if you have not already.
+      li Create a classroom on this page.
+      li Invite your students to the classroom.
+      
+    p
+      | You can invite your students even if they've already started playing CodeCombat.
+      
+    p
+      span.spr If you have any problems, please email
+      a(href="mailto:team@codecombat.com") team@codecombat.com
+      span .
+  
+  if !me.isAnonymous()
+    ul.nav.nav-tabs(role='tablist')
+      li.active(role='presentation')
+        a(href="#courses-tab-pane" aria-controls="courses" role="tab" data-toggle="tab") Courses
+      li(role='presentation')
+        a(href="#manage-tab-pane" aria-controls="manage" role="tab" data-toggle="tab") Manage
+    
+  .tab-content
+    #courses-tab-pane.tab-pane.well.active
+      h3 Your Courses
+      - var courseInstances = view.courseInstances.sliceWithMembers();
+      
+      if me.isAnonymous()
+        .alert.alert-info
+          strong Please click "Create Account" or "Log In" above to view and manage your courses.
+
+      else if !_.size(courseInstances)
+        .alert.alert-info
+          span.spr You currently have no students assigned to courses.
+          a#manage-tab-link Go to the manage tab to get set up.
+        
+      else
+        table.table
+          tr
+            th Class
+            th Course
+            th Size
+            th
+          for courseInstance in courseInstances
+            tr
+              td
+                - var classroom = view.classrooms.get(courseInstance.get('classroomID'));
+                if classroom
+                  | #{classroom.get('name')}
+              td
+                - var course = view.courses.get(courseInstance.get('courseID'))
+                if course
+                  | #{course.get('name')}
+              td= _.size(courseInstance.get('members'))
+              td
+                a.btn.btn-primary.btn-sm(href='/courses/#{courseInstance.get("courseID")}/#{courseInstance.id}') Enter
+            
+      h3 Available Courses
+      
+      for course in view.courses.models
+        .media
+          .pull-left
+            img.media-object(src=course.get('screenshot'))
+          .media-body
+            h3.media-heading
+              span.spr= course.get('name')
+              if course.get('free')
+                em (free!)
+            p= course.get('description')
+            p
+              strong.spr Concepts:
+              span= (course.get('concepts') || []).join(', ')
+            p
+              strong.spr Length:
+              span #{course.get('duration') || 0} hours
+          
+        
+      
+    #manage-tab-pane.tab-pane.well
+
+      p Create a class and add students to it.
+      
+      - var totalRedeemers = view.prepaids.totalRedeemers();
+      - var totalMaxRedeemers = view.prepaids.totalMaxRedeemers();
+      
+      .text-right
+        span.spr Used paid seats: #{totalRedeemers}/#{totalMaxRedeemers}
+        a.btn.btn-default.btn-xs(href="/courses/purchase") Add
+    
+      for classroom in view.classrooms.models
+        h2= classroom.get('name')
+        
+        - var courseInstances = view.courseInstances.where({classroomID: classroom.id})
+    
+        if classroom.saving || classroom.filling
+          .progress.progress-striped.active
+            .progress-bar(style="width: 100%")
+          
+        else
+          table.table
+            tr
+              th Student
+              for courseInstance in courseInstances
+                th
+                  if courseInstance.course
+                  | #{courseInstance.course.get('name')}
+              
+            if !_.size(classroom.get('members'))
+              tr
+                td(colspan=1+view.courses.size())
+                  em No students in this class yet.
+              
+            for member in classroom.get('members') || []
+              - var user = view.members.get(member);
+              if !user
+                - continue;
+              tr
+                td= user.get('name')
+                for courseInstance in courseInstances
+                  td
+                    if _.contains(courseInstance.get('members'), user.id)
+                      span.glyphicon.glyphicon-ok
+                    else
+                      input.course-instance-membership-checkbox(
+                        type='checkbox'
+                        data-course-instance-id=courseInstance.id
+                        data-user-id=user.id
+                      )
+          
+        button.add-students-btn.btn.btn-sm(data-classroom-id=classroom.id) Add Students
+    
+        hr
+      
+      .row
+        .col-sm-3.col-sm-offset-3
+          button#create-new-class-btn.btn.btn-default.btn-block Create New Class
+        .col-sm-3
+          input#new-classroom-name-input.form-control(placeholder='new class name')
+          
+      #fixed-area
+        .container
+          .row.well
+            if view.state === 'saving-changes'
+              p Saving changes
+              - var total = view.membershipAdditions.originalSize + view.usersToRedeem.originalSize;
+              - var left = view.membershipAdditions.size() + view.usersToRedeem.size();
+              - var pct = Math.max(10, (100 * (total - left) / total)).toFixed(1) + '%';
+              .progress.progress-striped.active
+                .progress-bar(style="width: #{pct}")
+            else
+              - var seatsLeft = totalMaxRedeemers - totalRedeemers - view.usersToRedeem.size();
+              if seatsLeft < 0
+                .alert.alert-danger
+                  span.spr You do not have enough seats to accommodate all students you have selected.
+                  a(href="/courses/purchase") Buy more seats.
+              else
+                .col-sm-2
+                  button#save-changes-btn.btn.btn-primary.btn-block(disabled=!view.numCourseInstancesToAddTo) Save Changes
+                .col-sm-5
+                  | Students to add to courses: #{view.numCourseInstancesToAddTo || 0}
+                .col-sm-5
+                  | Seats to expend: #{view.usersToRedeem.size()} (will have #{seatsLeft} seats left)
+    
+block footer
--- a/app/templates/play/level/level_loading.jade
+++ b/app/templates/play/level/level_loading.jade
@ -2,7 +2,7 @@

 .right-wing

-.loading-details.loading-container
+#loading-details.loading-container

  .level-loading-goals.secret
    .goals-title(data-i18n="play_level.goals") Goals
@ -10,6 +10,8 @@

  .errors

+  .intro-doc
+
  .progress-or-start-container
    button.start-level-button.btn.btn-lg.btn-success.btn-illustrated.header-font.needsclick(data-i18n="play_level.loading_start") Start Level

--- a/app/views/admin/AdministerUserModal.coffee
+++ b/app/views/admin/AdministerUserModal.coffee
@ -1,6 +1,7 @@
 ModalView = require 'views/core/ModalView'
 template = require 'templates/admin/administer-user-modal'
 User = require 'models/User'
+Prepaid = require 'models/Prepaid'

 module.exports = class AdministerUserModal extends ModalView
  id: "administer-user-modal"
@ -9,6 +10,7 @@ module.exports = class AdministerUserModal extends ModalView

  events:
    'click #save-changes': 'onSaveChanges'
+    'click #add-seats-btn': 'onClickAddSeatsButton'

  constructor: (options, @userHandle) ->
    super(options)
@ -58,3 +60,18 @@ module.exports = class AdministerUserModal extends ModalView
    options = {}
    options.success = => @hide()
    @user.patch(options)
+
+  onClickAddSeatsButton: ->
+    maxRedeemers = parseInt(@$('#seats-input').val())
+    return unless maxRedeemers and maxRedeemers > 0
+    prepaid = new Prepaid({
+      maxRedeemers: maxRedeemers
+      type: 'course'
+      creator: @user.id
+    })
+    prepaid.save()
+    @state = 'creating-prepaid'
+    @renderSelectors('#prepaid-form')
+    @listenTo prepaid, 'sync', ->
+      @state = 'made-prepaid'
+      @renderSelectors('#prepaid-form')
--- a/app/views/admin/AnalyticsView.coffee
+++ b/app/views/admin/AnalyticsView.coffee
@ -1,3 +1,5 @@
+require 'vendor/d3'
+d3Utils = require 'core/d3_utils'
 RootView = require 'views/core/RootView'
 template = require 'templates/admin/analytics'
 utils = require 'core/utils'
@ -5,86 +7,11 @@ utils = require 'core/utils'
 module.exports = class AnalyticsView extends RootView
  id: 'admin-analytics-view'
  template: template
+  lineColors: ['red', 'blue', 'green', 'purple', 'goldenrod', 'brown', 'darkcyan']

  constructor: (options) ->
    super options
-
-    @supermodel.addRequestResource('active_classes', {
-      url: '/db/analytics_perday/-/active_classes'
-      method: 'POST'
-      success: (data) =>
-        @activeClassGroups = {}
-        dayEventsMap = {}
-        for activeClass in data
-          dayEventsMap[activeClass.day] ?= {}
-          dayEventsMap[activeClass.day]['Total'] = 0
-          for event, val of activeClass.classes
-            @activeClassGroups[event] = true
-            dayEventsMap[activeClass.day][event] = val
-            dayEventsMap[activeClass.day]['Total'] += val
-        @activeClassGroups = Object.keys(@activeClassGroups)
-        @activeClassGroups.push 'Total'
-        for day of dayEventsMap
-          for event in @activeClassGroups
-            dayEventsMap[day][event] ?= 0
-        @activeClasses = []
-        for day of dayEventsMap
-          data = day: day, groups: []
-          for group in @activeClassGroups
-            data.groups.push(dayEventsMap[day][group] ? 0)
-          @activeClasses.push data
-        @activeClasses.sort (a, b) -> b.day.localeCompare(a.day)
-        @render?()
-    }, 0).load()
-
-    @supermodel.addRequestResource('active_users', {
-      url: '/db/analytics_perday/-/active_users'
-      method: 'POST'
-      success: (data) =>
-        @activeUsers = data
-        @activeUsers.sort (a, b) -> b.day.localeCompare(a.day)
-        @render?()
-    }, 0).load()
-
-    @supermodel.addRequestResource('recurring_revenue', {
-      url: '/db/analytics_perday/-/recurring_revenue'
-      method: 'POST'
-      success: (data) =>
-        @revenueGroups = {}
-        dayGroupCountMap = {}
-        for dailyRevenue in data
-          dayGroupCountMap[dailyRevenue.day] ?= {}
-          dayGroupCountMap[dailyRevenue.day]['Daily'] = 0
-          for group, val of dailyRevenue.groups
-            @revenueGroups[group] = true
-            dayGroupCountMap[dailyRevenue.day][group] = val
-            dayGroupCountMap[dailyRevenue.day]['Daily'] += val
-        @revenueGroups = Object.keys(@revenueGroups)
-        @revenueGroups.push 'Daily'
-        @revenueGroups.push 'Monthly'
-        for day of dayGroupCountMap
-          for group in @revenueGroups
-            dayGroupCountMap[day][group] ?= 0
-        @revenue = []
-        for day of dayGroupCountMap
-          data = day: day, groups: []
-          for group in @revenueGroups
-            data.groups.push(dayGroupCountMap[day][group] ? 0)
-          @revenue.push data
-        @revenue.sort (a, b) -> b.day.localeCompare(a.day)
-        monthlyValues = []
-
-        return unless @revenue.length > 0
-
-        for i in [@revenue.length-1..0]
-          dailyTotal = @revenue[i].groups[@revenue[i].groups.length - 2]
-          monthlyValues.push(dailyTotal)
-          monthlyValues.shift() if monthlyValues.length > 30
-          if monthlyValues.length is 30
-            monthlyIndex = @revenue[i].groups.length - 1
-            @revenue[i].groups[monthlyIndex] = _.reduce(monthlyValues, (s, num) -> s + num)
-        @render?()
-    }, 0).load()
+    @loadData()

  getRenderData: ->
    context = super()
@ -94,3 +21,308 @@ module.exports = class AnalyticsView extends RootView
    context.revenue = @revenue ? []
    context.revenueGroups = @revenueGroups ? {}
    context
+
+  afterRender: ->
+    super()
+    @createLineCharts()
+
+  loadData: ->
+    @supermodel.addRequestResource('active_classes', {
+      url: '/db/analytics_perday/-/active_classes'
+      method: 'POST'
+      success: (data) =>
+        # Organize data by day, then group
+        groupMap = {}
+        dayGroupMap = {}
+        for activeClass in data
+          dayGroupMap[activeClass.day] ?= {}
+          dayGroupMap[activeClass.day]['Total'] = 0
+          for group, val of activeClass.classes
+            groupMap[group] = true
+            dayGroupMap[activeClass.day][group] = val
+            dayGroupMap[activeClass.day]['Total'] += val
+        @activeClassGroups = Object.keys(groupMap)
+        @activeClassGroups.push 'Total'
+        # Build list of active classes, where each entry is a day of individual group values
+        @activeClasses = []
+        for day of dayGroupMap
+          dashedDay = "#{day.substring(0, 4)}-#{day.substring(4, 6)}-#{day.substring(6, 8)}"
+          data = day: dashedDay, groups: []
+          for group in @activeClassGroups
+            data.groups.push(dayGroupMap[day][group] ? 0)
+          @activeClasses.push data
+        @activeClasses.sort (a, b) -> b.day.localeCompare(a.day)
+
+        @updateAllKPIChartData()
+        @updateActiveClassesChartData()
+        @render?()
+    }, 0).load()
+
+    @supermodel.addRequestResource('active_users', {
+      url: '/db/analytics_perday/-/active_users'
+      method: 'POST'
+      success: (data) =>
+        @activeUsers = data.map (a) ->
+          a.day = "#{a.day.substring(0, 4)}-#{a.day.substring(4, 6)}-#{a.day.substring(6, 8)}"
+          a
+        @activeUsers.sort (a, b) -> b.day.localeCompare(a.day)
+
+        @updateAllKPIChartData()
+        @updateActiveUsersChartData()
+        @render?()
+    }, 0).load()
+
+    @supermodel.addRequestResource('recurring_revenue', {
+      url: '/db/analytics_perday/-/recurring_revenue'
+      method: 'POST'
+      success: (data) =>
+        # Organize data by day, then group
+        groupMap = {}
+        dayGroupCountMap = {}
+        for dailyRevenue in data
+          dayGroupCountMap[dailyRevenue.day] ?= {}
+          dayGroupCountMap[dailyRevenue.day]['Daily'] = 0
+          for group, val of dailyRevenue.groups
+            groupMap[group] = true
+            dayGroupCountMap[dailyRevenue.day][group] = val
+            dayGroupCountMap[dailyRevenue.day]['Daily'] += val
+        @revenueGroups = Object.keys(groupMap)
+        @revenueGroups.push 'Daily'
+        # Build list of recurring revenue entries, where each entry is a day of individual group values
+        @revenue = []
+        for day of dayGroupCountMap
+          dashedDay = "#{day.substring(0, 4)}-#{day.substring(4, 6)}-#{day.substring(6, 8)}"
+          data = day: dashedDay, groups: []
+          for group in @revenueGroups
+            data.groups.push(dayGroupCountMap[day][group] ? 0)
+          @revenue.push data
+        @revenue.sort (a, b) -> b.day.localeCompare(a.day)
+
+        return unless @revenue.length > 0
+
+        # Add monthly recurring revenue values
+        @revenueGroups.push 'Monthly'
+        monthlyValues = []
+        for i in [@revenue.length-1..0]
+          dailyTotal = @revenue[i].groups[@revenue[i].groups.length - 1]
+          monthlyValues.push(dailyTotal)
+          monthlyValues.shift() while monthlyValues.length > 30
+          if monthlyValues.length is 30
+            @revenue[i].groups.push(_.reduce(monthlyValues, (s, num) -> s + num))
+
+        @updateAllKPIChartData()
+        @updateRevenueChartData()
+        @render?()
+    }, 0).load()
+
+  createLineChartPoints: (days, data) ->
+    points = []
+    for entry, i in data
+      points.push
+        day: entry.day
+        y: entry.value
+
+    # Trim points preceding days
+    for point, i in points
+      if point.day is days[0]
+        points.splice(0, i)
+        break
+
+    # Ensure points for each day
+    for day, i in days
+      if points.length <= i or points[i].day isnt day
+        prevY = if i > 0 then points[i - 1].y else 0.0
+        points.splice i, 0,
+          y: prevY
+          day: day
+      points[i].x = i
+
+    points.splice(0, points.length - days.length) if points.length > days.length
+    points
+
+  createLineCharts: ->
+    d3Utils.createLineChart('.kpi-recent-chart', @kpiRecentChartLines)
+    d3Utils.createLineChart('.kpi-chart', @kpiChartLines)
+    d3Utils.createLineChart('.active-classes-chart', @activeClassesChartLines)
+    d3Utils.createLineChart('.active-users-chart', @activeUsersChartLines)
+    d3Utils.createLineChart('.recurring-revenue-chart', @revenueChartLines)
+
+  updateAllKPIChartData: ->
+    @kpiRecentChartLines = []
+    @kpiChartLines = []
+    @updateKPIChartData(60, @kpiRecentChartLines)
+    @updateKPIChartData(300, @kpiChartLines)
+
+  updateKPIChartData: (timeframeDays, chartLines) ->
+    days = d3Utils.createContiguousDays(timeframeDays)
+
+    if @activeClasses?.length > 0
+      data = []
+      for entry in @activeClasses
+        data.push
+          day: entry.day
+          value: entry.groups[entry.groups.length - 1]
+      data.reverse()
+      points = @createLineChartPoints(days, data)
+      chartLines.push
+        points: points
+        description: '30-day Active Classes'
+        lineColor: 'blue'
+        strokeWidth: 1
+        min: 0
+        max: _.max(points, 'y').y
+        showYScale: true
+
+    if @revenue?.length > 0
+      data = []
+      for entry in @revenue
+        data.push
+          day: entry.day
+          value: entry.groups[entry.groups.length - 1] / 100000
+      data.reverse()
+      points = @createLineChartPoints(days, data)
+      chartLines.push
+        points: points
+        description: '30-day Recurring Revenue (in thousands)'
+        lineColor: 'green'
+        strokeWidth: 1
+        min: 0
+        max: _.max(points, 'y').y
+        showYScale: true
+
+    if @activeUsers?.length > 0
+      data = []
+      for entry in @activeUsers
+        break unless entry.monthlyCount
+        data.push
+          day: entry.day
+          value: entry.monthlyCount / 1000
+      data.reverse()
+      points = @createLineChartPoints(days, data)
+      chartLines.push
+        points: points
+        description: '30-day Active Users (in thousands)'
+        lineColor: 'red'
+        strokeWidth: 1
+        min: 0
+        max: _.max(points, 'y').y
+        showYScale: true
+
+  updateActiveClassesChartData: ->
+    @activeClassesChartLines = []
+    return unless @activeClasses?.length
+    days = d3Utils.createContiguousDays(90)
+
+    groupDayMap = {}
+    for entry in @activeClasses
+      for count, i in entry.groups
+        groupDayMap[@activeClassGroups[i]] ?= {}
+        groupDayMap[@activeClassGroups[i]][entry.day] ?= 0
+        groupDayMap[@activeClassGroups[i]][entry.day] += count
+
+    lines = []
+    colorIndex = 0
+    totalMax = 0
+    for group, entries of groupDayMap
+      data = []
+      for day, count of entries
+        data.push
+          day: day
+          value: count
+      data.reverse()
+      points = @createLineChartPoints(days, data)
+      @activeClassesChartLines.push
+        points: points
+        description: group.replace('Active classes ', '')
+        lineColor: @lineColors[colorIndex++ % @lineColors.length]
+        strokeWidth: 1
+        min: 0
+        showYScale: group is 'Total'
+      totalMax = _.max(points, 'y').y if group is 'Total'
+    line.max = totalMax for line in @activeClassesChartLines
+
+  updateActiveUsersChartData: ->
+    @activeUsersChartLines = []
+    return unless @activeUsers?.length
+    days = d3Utils.createContiguousDays(90)
+
+    dailyData = []
+    monthlyData = []
+    dausmausData = []
+    colorIndex = 0
+    for entry in @activeUsers
+      dailyData.push
+        day: entry.day
+        value: entry.dailyCount / 1000
+      if entry.monthlyCount
+        monthlyData.push
+          day: entry.day
+          value: entry.monthlyCount / 1000
+        dausmausData.push
+          day: entry.day
+          value: Math.round(entry.dailyCount / entry.monthlyCount * 100)
+    dailyData.reverse()
+    monthlyData.reverse()
+    dausmausData.reverse()
+    dailyPoints = @createLineChartPoints(days, dailyData)
+    monthlyPoints = @createLineChartPoints(days, monthlyData)
+    dausmausPoints = @createLineChartPoints(days, dausmausData)
+    @activeUsersChartLines.push
+      points: dailyPoints
+      description: 'Daily active users (in thousands)'
+      lineColor: @lineColors[colorIndex++ % @lineColors.length]
+      strokeWidth: 1
+      min: 0
+      max: _.max(dailyPoints, 'y').y
+      showYScale: true
+    @activeUsersChartLines.push
+      points: monthlyPoints
+      description: 'Monthly active users (in thousands)'
+      lineColor: @lineColors[colorIndex++ % @lineColors.length]
+      strokeWidth: 1
+      min: 0
+      max: _.max(monthlyPoints, 'y').y
+      showYScale: true
+    @activeUsersChartLines.push
+      points: dausmausPoints
+      description: 'DAUs/MAUs %'
+      lineColor: @lineColors[colorIndex++ % @lineColors.length]
+      strokeWidth: 1
+      min: 0
+      max: _.max(dausmausPoints, 'y').y
+      showYScale: true
+
+  updateRevenueChartData: ->
+    @revenueChartLines = []
+    return unless @revenue?.length
+    days = d3Utils.createContiguousDays(90)
+
+    groupDayMap = {}
+    for entry in @revenue
+      for count, i in entry.groups
+        groupDayMap[@revenueGroups[i]] ?= {}
+        groupDayMap[@revenueGroups[i]][entry.day] ?= 0
+        groupDayMap[@revenueGroups[i]][entry.day] += count
+
+    lines = []
+    colorIndex = 0
+    dailyMax = 0
+    for group, entries of groupDayMap
+      data = []
+      for day, count of entries
+        data.push
+          day: day
+          value: count / 100
+      data.reverse()
+      points = @createLineChartPoints(days, data)
+      @revenueChartLines.push
+        points: points
+        description: group.replace('DRR ', '')
+        lineColor: @lineColors[colorIndex++ % @lineColors.length]
+        strokeWidth: 1
+        min: 0
+        max: _.max(points, 'y').y
+        showYScale: group in ['Daily', 'Monthly']
+      dailyMax = _.max(points, 'y').y if group is 'Daily'
+      for line in @revenueChartLines when line.description isnt 'Monthly'
+        line.max = dailyMax
--- a/app/views/contribute/ArchmageView.coffee
+++ b/app/views/contribute/ArchmageView.coffee
@ -7,6 +7,7 @@ module.exports = class ArchmageView extends ContributeClassView
  contributorClassName: 'archmage'

  contributors: [
+    {id: '547acbb2af18b03c0563fdb3', name: 'David Liu', github: 'trotod'}
    {id: '52ccfc9bd3eb6b5a4100b60d', name: 'Glen De Cauwsemaecker', github: 'GlenDC'}
    {id: '52bfc3ecb7ec628868001297', name: 'Tom Steinbrecher', github: 'TomSteinbrecher'}
    {id: '5272806093680c5817033f73', name: 'Sébastien Moratinos', github: 'smoratinos'}
--- a/app/views/core/CocoView.coffee
+++ b/app/views/core/CocoView.coffee
@ -132,6 +132,7 @@ module.exports = class CocoView extends Backbone.View
    context.translate = $.i18n.t
    context.view = @
    context._ = _
+    context.document = document
    context

  afterRender: ->
--- a/app/views/courses/CourseDetailsView.coffee
+++ b/app/views/courses/CourseDetailsView.coffee
@ -2,6 +2,7 @@ Campaign = require 'models/Campaign'
 CocoCollection = require 'collections/CocoCollection'
 Course = require 'models/Course'
 CourseInstance = require 'models/CourseInstance'
+Classroom = require 'models/Classroom'
 LevelSession = require 'models/LevelSession'
 RootView = require 'views/core/RootView'
 template = require 'templates/courses/course-details'
@ -25,12 +26,12 @@ module.exports = class CourseDetailsView extends RootView
    'click .progress-level-cell': 'onClickProgressLevelCell'
    'mouseenter .progress-level-cell': 'onMouseEnterPoint'
    'mouseleave .progress-level-cell': 'onMouseLeavePoint'
-    'click #invite-btn': 'onClickInviteButton'

  constructor: (options, @courseID, @courseInstanceID) ->
    super options
    @courseID ?= options.courseID
    @courseInstanceID ?= options.courseInstanceID
+    @classroom = new Classroom()
    @adminMode = me.isAdmin()
    @memberSort = 'nameAsc'
    @course = @supermodel.getModel(Course, @courseID) or new Course _id: @courseID
@ -119,6 +120,9 @@ module.exports = class CourseDetailsView extends RootView

  onCourseInstanceSync: ->
    # console.log 'onCourseInstanceSync'
+    if @courseInstance.get('classroomID')
+      @classroom = new Classroom({_id: @courseInstance.get('classroomID')})
+      @supermodel.loadModel @classroom, 'classroom'
    @adminMode = true if @courseInstance.get('ownerID') is me.id and @courseInstance.get('name') isnt 'Single Player'
    @levelSessions = new CocoCollection([], { url: "/db/course_instance/#{@courseInstance.id}/level_sessions", model: LevelSession, comparator:'_id' })
    @listenToOnce @levelSessions, 'sync', @onLevelSessionsSync
@ -261,26 +265,6 @@ module.exports = class CourseDetailsView extends RootView
      viewArgs: [{}, levelSlug]
    }

-  onClickInviteButton: (e) ->
-    emails = @$('#invite-emails-textarea').val()
-    emails = emails.split('\n')
-    emails = _.filter((_.string.trim(email) for email in emails))
-    if not emails.length
-      return
-    url = @courseInstance.url() + '/invite_students'
-    @$('#invite-btn, #invite-emails-textarea').addClass('hide')
-    @$('#invite-emails-sending-alert').removeClass('hide')
-
-    $.ajax({
-      url: url
-      data: {emails: emails}
-      method: 'POST'
-      context: @
-      success: ->
-        @$('#invite-emails-sending-alert').addClass('hide')
-        @$('#invite-emails-success-alert').removeClass('hide')
-    })
-
  onMouseEnterPoint: (e) ->
    $('.progress-popup-container').hide()
    container = $(e.target).find('.progress-popup-container').show()
--- a/app/views/courses/CoursesView.coffee
+++ b/app/views/courses/CoursesView.coffee
@ -1,238 +1,8 @@
 app = require 'core/application'
 AuthModal = require 'views/core/AuthModal'
-CocoCollection = require 'collections/CocoCollection'
-Course = require 'models/Course'
-CourseInstance = require 'models/CourseInstance'
 RootView = require 'views/core/RootView'
-template = require 'templates/courses/courses'
-utils = require 'core/utils'
-
-# TODO: Hour of Code (HoC) integration is a mess
+template = require 'templates/courses/courses-view'

 module.exports = class CoursesView extends RootView
  id: 'courses-view'
  template: template
-
-  events:
-    'click .btn-buy': 'onClickBuy'
-    'click .btn-enroll': 'onClickEnroll'
-    'click .btn-enter': 'onClickEnter'
-    'click .btn-hoc-student-continue': 'onClickHOCStudentContinue'
-    'click .btn-student': 'onClickStudent'
-    'click .btn-teacher': 'onClickTeacher'
-
-  constructor: (options) ->
-    super(options)
-    @setUpHourOfCode()
-    @praise = utils.getCoursePraise()
-    @studentMode = Backbone.history.getFragment()?.indexOf('courses/students') >= 0
-    @courses = new CocoCollection([], { url: "/db/course", model: Course})
-    @supermodel.loadCollection(@courses, 'courses')
-    @courseInstances = new CocoCollection([], { url: "/db/user/#{me.id}/course_instances", model: CourseInstance})
-    @listenToOnce @courseInstances, 'sync', @onCourseInstancesLoaded
-    @supermodel.loadCollection(@courseInstances, 'course_instances')
-    if prepaidCode = utils.getQueryVariable('_ppc', false)
-      if me.isAnonymous()
-        @state = 'ppc_logged_out'
-      else
-        @studentMode = true
-        @courseEnrollByURL(prepaidCode)
-
-  setUpHourOfCode: ->
-    # If we are coming in at /hoc, then we show the landing page.
-    # If we have ?hoc=true (for the step after the landing page), then we show any HoC-specific instructions.
-    # If we haven't tracked this player as an hourOfCode player yet, and it's a new account, we do that now.
-    @hocLandingPage = Backbone.history.getFragment()?.indexOf('hoc') >= 0
-    @hocMode = utils.getQueryVariable('hoc', false)
-    elapsed = new Date() - new Date(me.get('dateCreated'))
-    if not me.get('hourOfCode') and (@hocLandingPage or @hocMode) and elapsed < 5 * 60 * 1000
-      me.set('hourOfCode', true)
-      me.patch()
-      $('body').append($('<img src="https://code.org/api/hour/begin_codecombat.png" style="visibility: hidden;">'))
-      application.tracker?.trackEvent 'Hour of Code Begin'
-    if me.get('hourOfCode') and elapsed < 24 * 60 * 60 * 1000
-      @hocMode = true  # If they really just arrived, make sure we're still in hocMode even if they lost ?hoc=true.
-
-  getRenderData: ->
-    context = super()
-    context.courses = @courses.models ? []
-    context.enrolledCourses = @enrolledCourses ? {}
-    context.hocLandingPage = @hocLandingPage
-    context.hocMode = @hocMode
-    context.instances = @courseInstances.models ? []
-    context.praise = @praise
-    context.state = @state
-    context.stateMessage = @stateMessage
-    context.studentMode = @studentMode
-    context
-
-  afterRender: ->
-    super()
-    @setupCoursesFAQPopover()
-
-  onCourseInstancesLoaded: ->
-    @enrolledCourses = {}
-    @enrolledCourses[courseInstance.get('courseID')] = true for courseInstance in @courseInstances.models
-
-  setupCoursesFAQPopover: ->
-    popoverTitle = "<h3>" + $.i18n.t('courses.faq') + "<button type='button' class='close' onclick='$(&#39;.courses-faq&#39;).popover(&#39;hide&#39;);'>&times;</button></h3>"
-    popoverContent = "<p><strong>" + $.i18n.t('courses.question') + "</strong> " + $.i18n.t('courses.question1') + "</p>"
-    popoverContent += "<p><strong>" + $.i18n.t('courses.answer') + "</strong> " + $.i18n.t('courses.answer1') + "</p>"
-    popoverContent += "<p>" + $.i18n.t('courses.answer2') + "</p>"
-    @$el.find('.courses-faq').popover(
-      animation: true
-      html: true
-      placement: 'top'
-      trigger: 'click'
-      title: popoverTitle
-      content: popoverContent
-      container: @$el
-    ).on 'shown.bs.popover', =>
-      application.tracker?.trackEvent 'Subscription payment methods hover'
-
-  onClickBuy: (e) ->
-    $('.continue-dialog').modal('hide')
-    courseID = $(e.target).data('course-id')
-    route = "/courses/enroll/#{courseID}"
-    viewClass = require 'views/courses/CourseEnrollView'
-    viewArgs = [{}, courseID]
-    navigationEvent = route: route, viewClass: viewClass, viewArgs: viewArgs
-    Backbone.Mediator.publish 'router:navigate', navigationEvent
-
-  onClickEnroll: (e) ->
-    return @openModalView new AuthModal() if me.isAnonymous()
-    courseID = $(e.target).data('course-id')
-    prepaidCode = ($(".code-input[data-course-id=#{courseID}]").val() ? '').trim()
-    @courseEnrollByModal(prepaidCode)
-
-  onClickEnter: (e) ->
-    $('.continue-dialog').modal('hide')
-    courseID = $(e.target).data('course-id')
-    courseInstanceID = $(".select-session[data-course-id=#{courseID}]").val()
-    route = "/courses/#{courseID}/#{courseInstanceID}"
-    viewClass = require 'views/courses/CourseDetailsView'
-    viewArgs = [{}, courseID, courseInstanceID]
-    navigationEvent = route: route, viewClass: viewClass, viewArgs: viewArgs
-    Backbone.Mediator.publish 'router:navigate', navigationEvent
-
-  onClickHOCStudentContinue: (e) ->
-    $('.continue-dialog').modal('hide')
-    if e
-      courseID = $(e.target).data('course-id')
-    else
-      courseID = '560f1a9f22961295f9427742'
-
-    @state = 'enrolling'
-    @stateMessage = undefined
-    @render?()
-
-    # TODO: Copied from CourseEnrollView
-
-    data =
-      name: 'Single Player'
-      seats: 9999
-      courseID: courseID
-      hourOfCode: true
-    jqxhr = $.post('/db/course_instance/-/create', data)
-    jqxhr.done (data, textStatus, jqXHR) =>
-      application.tracker?.trackEvent 'Finished HoC student course creation', {courseID: courseID}
-      # TODO: handle fetch errors
-      me.fetch(cache: false).always =>
-        courseID = courseID
-        route = "/courses/#{courseID}"
-        viewArgs = [{}, courseID]
-        if data?.length > 0
-          courseInstanceID = data[0]._id
-          route += "/#{courseInstanceID}"
-          viewArgs[0].courseInstanceID = courseInstanceID
-        Backbone.Mediator.publish 'router:navigate',
-          route: route
-          viewClass: 'views/courses/CourseDetailsView'
-          viewArgs: viewArgs
-    jqxhr.fail (xhr, textStatus, errorThrown) =>
-      console.error 'Got an error purchasing a course:', textStatus, errorThrown
-      application.tracker?.trackEvent 'Failed HoC student course creation', status: textStatus
-      if xhr.status is 402
-        @state = 'declined'
-        @stateMessage = arguments[2]
-      else
-        @state = 'unknown_error'
-        @stateMessage = "#{xhr.status}: #{xhr.responseText}"
-      @render?()
-
-  onClickStudent: (e) ->
-    if @supermodel.finished() and @hocLandingPage
-      # Automatically enroll in first course
-      @onClickHOCStudentContinue()
-      return
-    route = "/courses/students"
-    route += "?hoc=true" if @hocLandingPage or @hocMode
-    viewClass = require 'views/courses/CoursesView'
-    navigationEvent = route: route, viewClass: viewClass, viewArgs: []
-    Backbone.Mediator.publish 'router:navigate', navigationEvent
-
-  onClickTeacher: (e) ->
-    route = "/courses/teachers"
-    route += "?hoc=true" if @hocLandingPage or @hocMode
-    viewClass = require 'views/courses/CoursesView'
-    navigationEvent = route: route, viewClass: viewClass, viewArgs: []
-    Backbone.Mediator.publish 'router:navigate', navigationEvent
-
-  courseEnrollByURL: (prepaidCode) ->
-    @state = 'enrolling'
-    @render?()
-    $.ajax({
-      method: 'POST'
-      url: '/db/course_instance/-/redeem_prepaid'
-      data: prepaidCode: prepaidCode
-      context: @
-      success: @onRedeemPrepaidSuccess
-      error: (xhr, textStatus, errorThrown) ->
-        console.error 'Got an error redeeming a course prepaid code:', textStatus, errorThrown
-        application.tracker?.trackEvent 'Failed to redeem course prepaid code by url', status: textStatus
-        @state = 'unknown_error'
-        @stateMessage = "Failed to redeem code: #{xhr.responseText}"
-        @render?()
-    })
-      
-  courseEnrollByModal: (prepaidCode) ->
-    @state = 'enrolling-by-modal'
-    @renderSelectors '.student-dialog-state-row'
-    $.ajax({
-      method: 'POST'
-      url: '/db/course_instance/-/redeem_prepaid'
-      data: prepaidCode: prepaidCode
-      context: @
-      success: ->
-        $('.continue-dialog').modal('hide')
-        @onRedeemPrepaidSuccess(arguments...)
-      error: (jqxhr, textStatus, errorThrown) ->
-        application.tracker?.trackEvent 'Failed to redeem course prepaid code by modal', status: textStatus
-        @state = 'unknown_error'
-        if jqxhr.status is 422
-          @stateMessage = 'Please enter a code.'
-        else if jqxhr.status is 404
-          @stateMessage = 'Code not found.'
-        else
-          @stateMessage = "#{jqxhr.responseText}"
-        @renderSelectors '.student-dialog-state-row'
-    })
-    
-  onRedeemPrepaidSuccess: (data, textStatus, jqxhr) ->
-    prepaidID = data[0]?.prepaidID
-    application.tracker?.trackEvent 'Redeemed course prepaid code', {prepaidCode: prepaidID}
-    me.fetch(cache: false).always =>
-      if data?.length > 0 && data[0].courseID && data[0]._id
-        courseID = data[0].courseID
-        courseInstanceID = data[0]._id
-        route = "/courses/#{courseID}/#{courseInstanceID}"
-        viewArgs = [{}, courseID, courseInstanceID]
-        Backbone.Mediator.publish 'router:navigate',
-          route: route
-          viewClass: 'views/courses/CourseDetailsView'
-          viewArgs: viewArgs
-      else
-        @state = 'unknown_error'
-        @stateMessage = "Database error."
-        @render?()
-
--- a/app/views/courses/HourOfCodeView.coffee
+++ b/app/views/courses/HourOfCodeView.coffee
@ -0,0 +1,49 @@
+app = require 'core/application'
+AuthModal = require 'views/core/AuthModal'
+CocoCollection = require 'collections/CocoCollection'
+Course = require 'models/Course'
+CourseInstance = require 'models/CourseInstance'
+RootView = require 'views/core/RootView'
+template = require 'templates/courses/hour-of-code-view'
+utils = require 'core/utils'
+
+
+module.exports = class HourOfCodeView extends RootView
+  id: 'hour-of-code-view'
+  template: template
+  
+  events:
+    'click #student-btn': 'onClickStudentButton'
+
+  constructor: (options) ->
+    super(options)
+    @setUpHourOfCode()
+
+  setUpHourOfCode: ->
+    # If we are coming in at /hoc, then we show the landing page.
+    # If we have ?hoc=true (for the step after the landing page), then we show any HoC-specific instructions.
+    # If we haven't tracked this player as an hourOfCode player yet, and it's a new account, we do that now.
+    @hocLandingPage = true
+    @hocMode = true
+    elapsed = new Date() - new Date(me.get('dateCreated'))
+    if not me.get('hourOfCode') and (@hocLandingPage or @hocMode) and elapsed < 5 * 60 * 1000
+      me.set('hourOfCode', true)
+      me.patch()
+      $('body').append($('<img src="https://code.org/api/hour/begin_codecombat.png" style="visibility: hidden;">'))
+      application.tracker?.trackEvent 'Hour of Code Begin'
+
+  onClickStudentButton: ->
+    @state = 'enrolling'
+    @stateMessage = undefined
+    @render?()
+
+    $.ajax({
+      method: 'POST'
+      url: '/db/course_instance/-/create-for-hoc'
+      context: @
+      success: (data) ->
+        application.tracker?.trackEvent 'Finished HoC student course creation', {courseID: data.courseID}
+        app.router.navigate("/courses/#{data.courseID}/#{data._id}", {
+          trigger: true
+        })
+    })
--- a/app/views/courses/InviteToClassroomModal.coffee
+++ b/app/views/courses/InviteToClassroomModal.coffee
@ -0,0 +1,32 @@
+ModalView = require 'views/core/ModalView'
+template = require 'templates/courses/invite-to-classroom-modal'
+
+module.exports = class InviteToClassroomModal extends ModalView
+  id: 'invite-to-classroom-modal'
+  template: template
+  
+  events:
+    'click #send-invites-btn': 'onClickSendInvitesButton'
+
+  initialize: (options) ->
+    @classroom = options.classroom
+
+  onClickSendInvitesButton: ->
+    emails = @$('#invite-emails-textarea').val()
+    emails = emails.split('\n')
+    emails = _.filter((_.string.trim(email) for email in emails))
+    if not emails.length
+      return
+    url = @classroom.url() + '/invite-members'
+    @$('#send-invites-btn, #invite-emails-textarea').addClass('hide')
+    @$('#invite-emails-sending-alert').removeClass('hide')
+
+    $.ajax({
+      url: url
+      data: {emails: emails}
+      method: 'POST'
+      context: @
+      success: ->
+        @$('#invite-emails-sending-alert').addClass('hide')
+        @$('#invite-emails-success-alert').removeClass('hide')
+    })
--- a/app/views/courses/PurchaseCoursesView.coffee
+++ b/app/views/courses/PurchaseCoursesView.coffee
@ -0,0 +1,85 @@
+app = require 'core/application'
+AuthModal = require 'views/core/AuthModal'
+CocoCollection = require 'collections/CocoCollection'
+Course = require 'models/Course'
+RootView = require 'views/core/RootView'
+stripeHandler = require 'core/services/stripe'
+template = require 'templates/courses/purchase-courses-view'
+utils = require 'core/utils'
+
+module.exports = class PurchaseCoursesView extends RootView
+  id: 'purchase-courses-view'
+  template: template
+  numberOfStudents: 30
+  pricePerStudent: 4
+  
+  initialize: (options) ->
+    @listenTo stripeHandler, 'received-token', @onStripeReceivedToken
+    super(options)
+  
+  events:
+    'input #students-input': 'onInputStudentsInput'
+    'click #purchase-btn': 'onClickPurchaseButton'
+
+  getPriceString: -> '$' + (@getPrice()).toFixed(2)
+  getPrice: -> @pricePerStudent * @numberOfStudents
+
+  onInputStudentsInput: ->
+    @numberOfStudents = parseInt(@$('#students-input').val()) or 0
+    @updatePrice()
+
+  updatePrice: ->
+    @renderSelectors '#price-form-group'
+
+  onClickPurchaseButton: ->
+    return @openModalView new AuthModal() if me.isAnonymous()
+    if @numberOfStudents < 1 or not _.isFinite(@numberOfStudents)
+      alert("Please enter the maximum number of students needed for your class.")
+      return
+
+    @state = undefined
+    @stateMessage = undefined
+    @render()
+
+    # Show Stripe handler
+    application.tracker?.trackEvent 'Started course prepaid purchase', {
+      price: @pricePerStudent, students: @pricePerStudent}
+    stripeHandler.open
+      amount: @price
+      description: "Full course access for #{@numberOfStudents} students"
+      bitcoin: true
+      alipay: if me.get('country') is 'china' or (me.get('preferredLanguage') or 'en-US')[...2] is 'zh' then true else 'auto'
+
+  onStripeReceivedToken: (e) ->
+    @state = 'purchasing'
+    @render?()
+    console.log 'e', e
+    
+    data =
+      maxRedeemers: @numberOfStudents
+      type: 'course'
+      stripe:
+        token: e.token.id
+        timestamp: new Date().getTime()
+      
+    $.ajax({
+      url: '/db/prepaid/-/purchase',
+      data: data,
+      method: 'POST',
+      context: @
+      success: ->
+        application.tracker?.trackEvent 'Finished course prepaid purchase', {price: @pricePerStudent, seats: @numberOfStudents}
+        @state = 'purchased'
+        @render?()
+        
+      error: (jqxhr, textStatus, errorThrown) ->
+        application.tracker?.trackEvent 'Failed course prepaid purchase', status: textStatus
+        if jqxhr.status is 402
+          @state = 'error'
+          @stateMessage = arguments[2]
+        else
+          @state = 'error'
+          @stateMessage = "#{jqxhr.status}: #{jqxhr.responseText}"
+        @render?()
+    })
+
--- a/app/views/courses/StudentCoursesView.coffee
+++ b/app/views/courses/StudentCoursesView.coffee
@ -0,0 +1,93 @@
+app = require 'core/application'
+AuthModal = require 'views/core/AuthModal'
+CocoCollection = require 'collections/CocoCollection'
+Course = require 'models/Course'
+Classroom = require 'models/Classroom'
+User = require 'models/User'
+CourseInstance = require 'models/CourseInstance'
+RootView = require 'views/core/RootView'
+template = require 'templates/courses/student-courses-view'
+utils = require 'core/utils'
+
+# TODO: Implement join class
+# TODO: Implement course instance links
+
+module.exports = class StudentCoursesView extends RootView
+  id: 'student-courses-view'
+  template: template
+
+  events:
+    'click #join-class-btn': 'onClickJoinClassButton'
+
+  constructor: (options) ->
+    super(options)
+    @courseInstances = new CocoCollection([], { url: "/db/user/#{me.id}/course_instances", model: CourseInstance})
+    @courseInstances.comparator = (ci) -> return ci.get('classroomID') + ci.get('courseID')
+    @supermodel.loadCollection(@courseInstances, 'course_instances')
+    @classrooms = new CocoCollection([], { url: "/db/classroom", model: Classroom })
+    @supermodel.loadCollection(@classrooms, 'classrooms', { data: {memberID: me.id} })
+    @courses = new CocoCollection([], { url: "/db/course", model: Course})
+    @supermodel.loadCollection(@courses, 'courses')
+      
+  onLoaded: ->
+    if (@classCode = utils.getQueryVariable('_cc', false)) and not me.isAnonymous()
+      @joinClass()
+    super()
+
+  onClickJoinClassButton: (e) ->
+    return @openModalView new AuthModal() if me.isAnonymous()
+    @classCode = @$('#classroom-code-input').val()
+    @joinClass()
+
+  joinClass: () ->
+    @state = 'enrolling'
+    @renderSelectors '#join-classroom-form'
+    $.ajax({
+      method: 'POST'
+      url: '/db/classroom/-/members'
+      data: code: @classCode
+      context: @
+      success: @onJoinClassroomSuccess
+      error: (jqxhr, textStatus, errorThrown) ->
+        application.tracker?.trackEvent 'Failed to join classroom with code', status: textStatus
+        @state = 'unknown_error'
+        if jqxhr.status is 422
+          @stateMessage = 'Please enter a code.'
+        else if jqxhr.status is 404
+          @stateMessage = 'Code not found.'
+        else
+          @stateMessage = "#{jqxhr.responseText}"
+        @renderSelectors '#join-classroom-form'
+    })
+
+  onJoinClassroomSuccess: (data, textStatus, jqxhr) ->
+    classroom = new Classroom(data)
+    application.tracker?.trackEvent 'Joined classroom', {
+      classroomID: classroom.id, 
+      classroomName: classroom.get('name')
+      ownerID: classroom.get('ownerID')
+    }
+    @classrooms.add(classroom)
+    @render()
+    
+    classroomCourseInstances = new CocoCollection([], { url: "/db/course_instance", model: CourseInstance })
+    classroomCourseInstances.fetch({ data: {classroomID: classroom.id} })
+    @listenToOnce classroomCourseInstances, 'sync', ->
+      
+      # join any course instances in the classroom which are free to join
+      jqxhrs = []
+      for courseInstance in classroomCourseInstances.models
+        course = @courses.get(courseInstance.get('courseID'))
+        if course.get('free')
+          jqxhrs.push $.ajax({
+            method: 'POST'
+            url: _.result(courseInstance, 'url') + '/members'
+            data: { userID: me.id }
+            context: @
+            success: (data) ->
+              @courseInstances.add(data)
+              @courseInstances.get(data._id).justJoined = true
+          })
+      $.when(jqxhrs...).done =>
+        @state = ''
+        @render()
--- a/app/views/courses/TeacherCoursesView.coffee
+++ b/app/views/courses/TeacherCoursesView.coffee
@ -0,0 +1,204 @@
+app = require 'core/application'
+AuthModal = require 'views/core/AuthModal'
+CocoCollection = require 'collections/CocoCollection'
+CocoModel = require 'models/CocoModel'
+Course = require 'models/Course'
+Classroom = require 'models/Classroom'
+User = require 'models/User'
+Prepaid = require 'models/Prepaid'
+CourseInstance = require 'models/CourseInstance'
+RootView = require 'views/core/RootView'
+template = require 'templates/courses/teacher-courses-view'
+utils = require 'core/utils'
+InviteToClassroomModal = require 'views/courses/InviteToClassroomModal' 
+
+module.exports = class TeacherCoursesView extends RootView
+  id: 'teacher-courses-view'
+  template: template
+  
+  events:
+    'click #create-new-class-btn': 'onClickCreateNewclassButton'
+    'click .add-students-btn': 'onClickAddStudentsButton'
+    'click .course-instance-membership-checkbox': 'onClickCourseInstanceMembershipCheckbox'
+    'click #save-changes-btn': 'onClickSaveChangesButton'
+    'click #manage-tab-link': 'onClickManageTabLink'
+
+  constructor: (options) ->
+    super(options)
+    @courses = new CocoCollection([], { url: "/db/course", model: Course})
+    @supermodel.loadCollection(@courses, 'courses')
+    @classrooms = new CocoCollection([], { url: "/db/classroom", model: Classroom })
+    @classrooms.comparator = '_id'
+    @listenToOnce @classrooms, 'sync', @onceClassroomsSync
+    @supermodel.loadCollection(@classrooms, 'classrooms', {data: {ownerID: me.id}})
+    @courseInstances = new CocoCollection([], { url: "/db/course_instance", model: CourseInstance })
+    @courseInstances.comparator = 'courseID'
+    @courseInstances.sliceWithMembers = -> return @filter (courseInstance) -> _.size(courseInstance.get('members')) and courseInstance.get('classroomID')
+    @supermodel.loadCollection(@courseInstances, 'course_instances', {data: {ownerID: me.id}})
+    @members = new CocoCollection([], { model: User })
+    @prepaids = new CocoCollection([], { url: "/db/prepaid", model: Prepaid })
+    sum = (numbers) -> _.reduce(numbers, (a, b) -> a + b)
+    @prepaids.totalMaxRedeemers = -> sum((prepaid.get('maxRedeemers') for prepaid in @models)) or 0
+    @prepaids.totalRedeemers = -> sum((_.size(prepaid.get('redeemers')) for prepaid in @models)) or 0
+    @prepaids.comparator = '_id'
+    @supermodel.loadCollection(@prepaids, 'prepaids', {data: {creator: me.id}})
+    @listenTo @members, 'sync', @renderManageTab
+    @usersToRedeem = new CocoCollection([], { model: User })
+    @hoc = utils.getQueryVariable('hoc')
+    @
+
+  onceClassroomsSync: ->
+    for classroom in @classrooms.models
+      @members.fetch({
+        remove: false
+        url: "/db/classroom/#{classroom.id}/members"
+      })
+
+  onClickCreateNewclassButton: ->
+    name = @$('#new-classroom-name-input').val()
+    return unless name
+    classroom = new Classroom({ name: name })
+    classroom.save()
+    @classrooms.add(classroom)
+    classroom.saving = true
+    @renderManageTab()
+    @listenTo classroom, 'sync', ->
+      classroom.saving = false
+      @fillMissingCourseInstances()
+      
+  renderManageTab: ->
+    isActive = @$('#manage-tab-pane').hasClass('active')
+    @renderSelectors('#manage-tab-pane')
+    @$('#manage-tab-pane').toggleClass('active', isActive)
+
+  onClickAddStudentsButton: (e) ->
+    classroomID = $(e.target).data('classroom-id')
+    classroom = @classrooms.get(classroomID)
+    modal = new InviteToClassroomModal({classroom: classroom})
+    @openModalView(modal)
+    
+  onLoaded: ->
+    super()
+    @linkCourseIntancesToCourses()
+    @fillMissingCourseInstances()
+
+  linkCourseIntancesToCourses: ->
+    for courseInstance in @courseInstances.models
+      courseInstance.course = @courses.get(courseInstance.get('courseID'))
+    
+  fillMissingCourseInstances: ->
+    # TODO: Give teachers control over which courses are enabled for a given class.
+    # Add/remove course instances and columns in the view to match.
+    for classroom in @classrooms.models
+      classroom.filling = false
+      for course in @courses.models
+        courseInstance = @courseInstances.findWhere({classroomID: classroom.id, courseID: course.id})
+        if not courseInstance
+          classroom.filling = true
+          courseInstance = new CourseInstance({
+            classroomID: classroom.id
+            courseID: course.id
+          })
+          # TODO: figure out a better way to get around triggering validation errors for properties
+          # that the server will end up filling in, like an empty members array, ownerID
+          courseInstance.save(null, {validate: false})
+          courseInstance.course = course
+          @courseInstances.add(courseInstance)
+          @listenToOnce courseInstance, 'sync', @fillMissingCourseInstances
+          @renderManageTab()
+          return
+    @renderManageTab()
+
+  onClickCourseInstanceMembershipCheckbox: ->
+    usersToRedeem = {}
+    checkedBoxes = @$('.course-instance-membership-checkbox:checked')
+    _.each checkedBoxes, (el) =>
+      $el = $(el)
+      userID = $el.data('user-id')
+      return if usersToRedeem[userID]
+      user = @members.get(userID)
+      return if user.get('coursePrepaidID')
+      courseInstanceID = $el.data('course-instance-id')
+      courseInstance = @courseInstances.get(courseInstanceID)
+      return if courseInstance.course.get('free')
+      usersToRedeem[userID] = user
+
+    @usersToRedeem = new CocoCollection(_.values(usersToRedeem), {model: User})
+    @numCourseInstancesToAddTo = checkedBoxes.length
+    @renderSelectors '#fixed-area'
+    
+  onClickSaveChangesButton: ->
+    @$('.course-instance-membership-checkbox').attr('disabled', true)
+    checkedBoxes = @$('.course-instance-membership-checkbox:checked')
+    raw = _.map checkedBoxes, (el) =>
+      $el = $(el)
+      userID = $el.data('user-id')
+      courseInstanceID = $el.data('course-instance-id')
+      courseInstance = @courseInstances.get(courseInstanceID)
+      return {
+        courseInstance: courseInstance
+        userID: userID
+      }
+    @membershipAdditions = new CocoCollection(raw, { model: User }) # TODO: Allow collections not to have models defined?
+    @membershipAdditions.originalSize = @membershipAdditions.size()
+    @usersToRedeem.originalSize = @usersToRedeem.size()
+    @state = 'saving-changes'
+    @renderSelectors '#fixed-area'
+    @redeemUsers()
+    
+  redeemUsers: ->
+    if not @usersToRedeem.size()
+      @addMemberships()
+      return
+    
+    user = @usersToRedeem.first()
+    prepaid = @prepaids.find (prepaid) -> prepaid.openSpots()
+    $.ajax({
+      method: 'POST'
+      url: _.result(prepaid, 'url') + '/redeemers'
+      data: { userID: user.id }
+      context: @
+      success: ->
+        @usersToRedeem.remove(user)
+        @renderSelectors '#fixed-area'
+        @redeemUsers()
+      error: (jqxhr, textStatus, errorThrown) ->
+        if jqxhr.status is 402
+          @state = 'error'
+          @stateMessage = arguments[2]
+        else
+          @state = 'error'
+          @stateMessage = "#{jqxhr.status}: #{jqxhr.responseText}"
+        @renderSelectors '#fixed-area'
+    })
+
+  addMemberships: ->
+    if not @membershipAdditions.size()
+      @renderSelectors '#fixed-area'
+      document.location.reload()
+      return
+      
+    membershipAddition = @membershipAdditions.first()
+    courseInstance = membershipAddition.get('courseInstance')
+    userID = membershipAddition.get('userID')
+    $.ajax({
+      method: 'POST'
+      url: _.result(courseInstance, 'url') + '/members'
+      data: { userID: userID }
+      context: @
+      success: ->
+        @membershipAdditions.remove(membershipAddition)
+        @renderSelectors '#fixed-area'
+        @addMemberships()
+      error: (jqxhr, textStatus, errorThrown) ->
+        if jqxhr.status is 402
+          @state = 'error'
+          @stateMessage = arguments[2]
+        else
+          @state = 'error'
+          @stateMessage = "#{jqxhr.status}: #{jqxhr.responseText}"
+        @renderSelectors '#fixed-area'
+    })
+
+  onClickManageTabLink: ->
+    @$('.nav-tabs a[href="#manage-tab-pane"]').tab('show')
--- a/app/views/play/level/LevelLoadingView.coffee
+++ b/app/views/play/level/LevelLoadingView.coffee
@ -14,6 +14,7 @@ module.exports = class LevelLoadingView extends CocoView

  subscriptions:
    'level:loaded': 'onLevelLoaded'  # If Level loads after level loading view.
+    'level:session-loaded': 'onSessionLoaded'
    'level:subscription-required': 'onSubscriptionRequired'  # If they'd need a subscription to start playing.
    'level:course-membership-required': 'onCourseMembershipRequired'  # If they'd need a subscription to start playing.
    'subscribe-modal:subscribed': 'onSubscribed'
@ -44,6 +45,14 @@ module.exports = class LevelLoadingView extends CocoView

  onLevelLoaded: (e) ->
    @level = e.level
+    @prepareGoals()
+    @prepareTip()
+    @prepareIntro()
+
+  onSessionLoaded: (e) ->
+    @session = e.session if e.session.get('creator') is me.id
+
+  prepareGoals: ->
    goalContainer = @$el.find('.level-loading-goals')
    goalList = goalContainer.find('ul')
    goalCount = 0
@ -55,57 +64,121 @@ module.exports = class LevelLoadingView extends CocoView
      goalContainer.removeClass('secret')
      if goalCount is 1
        goalContainer.find('.panel-heading').text $.i18n.t 'play_level.goal'  # Not plural
+
+  prepareTip: ->
    tip = @$el.find('.tip')
    if @level.get('loadingTip')
      loadingTip = utils.i18n @level.attributes, 'loadingTip'
      tip.text(loadingTip)
    tip.removeClass('secret')

+  prepareIntro: ->
+    @docs = @level.get('documentation') ? {}
+    specific = @docs.specificArticles or []
+    @intro = _.find specific, name: 'Intro'
+
  showReady: ->
    return if @shownReady
    @shownReady = true
-    _.delay @finishShowingReady, 1500  # Let any blocking JS hog the main thread before we show that we're done.
+    _.delay @finishShowingReady, 100  # Let any blocking JS hog the main thread before we show that we're done.

  finishShowingReady: =>
    return if @destroyed
-    if @options.autoUnveil
+    showIntro = @getQueryVariable('intro')
+    autoUnveil = not showIntro and (@options.autoUnveil or @session?.get('state').complete)
+    if autoUnveil
      @startUnveiling()
-      @unveil()
+      @unveil true
    else
      @playSound 'level_loaded', 0.75  # old: loading_ready
      @$el.find('.progress').hide()
      @$el.find('.start-level-button').show()
+      @unveil false

  startUnveiling: (e) ->
    @playSound 'menu-button-click'
+    @unveiling = true
    Backbone.Mediator.publish 'level:loading-view-unveiling', {}
    _.delay @onClickStartLevel, 1000  # If they never mouse-up for the click (or a modal shows up and interrupts the click), do it anyway.

  onClickStartLevel: (e) =>
    return if @destroyed
-    @unveil()
+    @unveil true

  onEnterPressed: (e) ->
-    return unless @shownReady and not @$el.hasClass 'unveiled'
+    return unless @shownReady and not @unveiled
    @startUnveiling()
    @onClickStartLevel()

-  unveil: ->
-    return if @$el.hasClass 'unveiled'
-    @$el.addClass 'unveiled'
-    loadingDetails = @$el.find('.loading-details')
-    duration = parseFloat loadingDetails.css 'transition-duration'
-    loadingDetails.css 'top', -loadingDetails.outerHeight(true)
+  unveil: (full) ->
+    return if @destroyed or @unveiled
+    @unveiled = full
+    @$loadingDetails = @$el.find('#loading-details')
+    duration = parseFloat(@$loadingDetails.css 'transition-duration') * 1000
+    unless @$el.hasClass 'unveiled'
+      @$el.addClass 'unveiled'
+      @unveilWings duration
+    if full
+      @unveilLoadingFull()
+      _.delay @onUnveilEnded, duration
+    else
+      @unveilLoadingPreview duration
+
+  unveilLoadingFull: ->
+    # Get rid of the loading details screen entirely--the level is totally ready.
+    unless @unveiling
+      Backbone.Mediator.publish 'level:loading-view-unveiling', {}
+      @unveiling = true
+    if @$el.hasClass 'preview-screen'
+      @$loadingDetails.css 'right', -@$loadingDetails.outerWidth(true)
+    else
+      @$loadingDetails.css 'top', -@$loadingDetails.outerHeight(true)
+    @$el.removeClass 'preview-screen'
+    $('#canvas-wrapper').removeClass 'preview-overlay'
+
+  unveilLoadingPreview: (duration) ->
+    # Move the loading details screen over the code editor to preview the level.
+    return if @$el.hasClass 'preview-screen'
+    $('#canvas-wrapper').addClass 'preview-overlay'
+    @$el.addClass('preview-screen')
+    @$loadingDetails.addClass('preview')
+    @resize()
+    @onWindowResize = _.debounce @onWindowResize, 700  # Wait a bit for other views to resize before we resize
+    $(window).on 'resize', @onWindowResize
+    if @intro
+      @$el.find('.progress-or-start-container').addClass('intro-footer')
+      @$el.find('#tip-wrapper').remove()
+      _.delay @unveilIntro, duration
+
+  resize: ->
+    maxHeight = $('#page-container').outerHeight(true)
+    minHeight = $('#code-area').outerHeight(true)
+    @$el.css height: maxHeight
+    @$loadingDetails.css minHeight: minHeight, maxHeight: maxHeight
+    $intro = @$el.find('.intro-doc')
+    $intro.css maxHeight: minHeight - $intro.offset().top - @$el.find('.progress-or-start-container').outerHeight() - 30 - 20
+
+  unveilWings: (duration) ->
+    @playSound 'loading-view-unveil', 0.5
    @$el.find('.left-wing').css left: '-100%', backgroundPosition: 'right -400px top 0'
    @$el.find('.right-wing').css right: '-100%', backgroundPosition: 'left -400px top 0'
-    @playSound 'loading-view-unveil', 0.5
-    _.delay @onUnveilEnded, duration * 1000
-    $('#level-footer-background').detach().appendTo('#page-container').slideDown(duration * 1000)
+    $('#level-footer-background').detach().appendTo('#page-container').slideDown(duration)
+
+  unveilIntro: =>
+    return if @destroyed or not @intro or @unveiled
+    html = marked utils.filterMarkdownCodeLanguages(utils.i18n(@intro, 'body'))
+    @$el.find('.intro-doc').html html
+    @resize()

  onUnveilEnded: =>
    return if @destroyed
    Backbone.Mediator.publish 'level:loading-view-unveiled', view: @

+  onWindowResize: (e) =>
+    return if @destroyed
+    @$loadingDetails.css transition: 'none'
+    @resize()
+
  onSubscriptionRequired: (e) ->
    @$el.find('.level-loading-goals, .tip, .load-progress').hide()
    @$el.find('.subscription-required').show()
@ -120,3 +193,7 @@ module.exports = class LevelLoadingView extends CocoView

  onSubscribed: ->
    document.location.reload()
+
+  destroy: ->
+    $(window).off 'resize', @onWindowResize
+    super()
--- a/app/views/play/level/PlayLevelView.coffee
+++ b/app/views/play/level/PlayLevelView.coffee
@ -155,7 +155,7 @@ module.exports = class PlayLevelView extends RootView
  afterRender: ->
    super()
    window.onPlayLevelViewLoaded? @  # still a hack
-    @insertSubView @loadingView = new LevelLoadingView autoUnveil: @options.autoUnveil or @observing, level: @levelLoader?.level ? @level  # May not have @level loaded yet
+    @insertSubView @loadingView = new LevelLoadingView autoUnveil: @options.autoUnveil or @observing, level: @levelLoader?.level ? @level, session: @levelLoader?.session ? @session  # May not have @level loaded yet
    @$el.find('#level-done-button').hide()
    $('body').addClass('is-playing')
    $('body').bind('touchmove', false) if @isIPadApp()
@ -177,7 +177,6 @@ module.exports = class PlayLevelView extends RootView
    @initVolume()
    @listenTo(@session, 'change:multiplayer', @onMultiplayerChanged)

-    @originalSessionState = $.extend(true, {}, @session.get('state'))
    @register()
    @controlBar.setBus(@bus)
    @initScriptManager()
@ -341,14 +340,16 @@ module.exports = class PlayLevelView extends RootView
    if window.currentModal and not window.currentModal.destroyed and window.currentModal.constructor isnt VictoryModal
      return Backbone.Mediator.subscribeOnce 'modal:closed', @onLevelStarted, @
    @surface.showLevel()
-    if @isEditorPreview or @observing
+    Backbone.Mediator.publish 'level:set-time', time: 0
+    if (@isEditorPreview or @observing) and not @getQueryVariable('intro')
      @loadingView.startUnveiling()
-      @loadingView.unveil()
+      @loadingView.unveil true

  onLoadingViewUnveiling: (e) ->
-    @restoreSessionState()
+    @selectHero()

  onLoadingViewUnveiled: (e) ->
+    Backbone.Mediator.publish 'level:set-playing', playing: true
    @loadingView.$el.remove()
    @removeSubView @loadingView
    @loadingView = null
@ -372,21 +373,11 @@ module.exports = class PlayLevelView extends RootView
    @ambientSound = createjs.Sound.play src, loop: -1, volume: 0.1
    createjs.Tween.get(@ambientSound).to({volume: 1.0}, 10000)

-  restoreSessionState: ->
-    return if @alreadyLoadedState
-    @alreadyLoadedState = true
-    state = @originalSessionState
-    if not @level or @level.get('type', true) in ['hero', 'hero-ladder', 'hero-coop', 'course', 'course-ladder']
-      Backbone.Mediator.publish 'level:suppress-selection-sounds', suppress: true
-      Backbone.Mediator.publish 'tome:select-primary-sprite', {}
-      Backbone.Mediator.publish 'level:suppress-selection-sounds', suppress: false
-      @surface.focusOnHero()
-      Backbone.Mediator.publish 'level:set-time', time: 0
-      Backbone.Mediator.publish 'level:set-playing', playing: true
-    else
-      if state.selected
-        # TODO: Should also restore selected spell here by saving spellName
-        Backbone.Mediator.publish 'level:select-sprite', thangID: state.selected, spellName: null
+  selectHero: ->
+    Backbone.Mediator.publish 'level:suppress-selection-sounds', suppress: true
+    Backbone.Mediator.publish 'tome:select-primary-sprite', {}
+    Backbone.Mediator.publish 'level:suppress-selection-sounds', suppress: false
+    @surface.focusOnHero()

  # callbacks

--- a/app/views/play/level/tome/SpellPaletteEntryView.coffee
+++ b/app/views/play/level/tome/SpellPaletteEntryView.coffee
@ -3,7 +3,7 @@ template = require 'templates/play/level/tome/spell_palette_entry'
 {me} = require 'core/auth'
 filters = require 'lib/image_filter'
 DocFormatter = require './DocFormatter'
-SpellView = require 'views/play/level/tome/SpellView'
+utils = require 'core/utils'

 module.exports = class SpellPaletteEntryView extends CocoView
  tagName: 'div'  # Could also try <code> instead of <div>, but would need to adjust colors
@ -59,26 +59,8 @@ module.exports = class SpellPaletteEntryView extends CocoView
      @aceEditors = []
      aceEditors = @aceEditors
      popover?.$tip?.find('.docs-ace').each ->
-        contents = $(@).text()
-        editor = ace.edit @
-        editor.setOptions maxLines: Infinity
-        editor.setReadOnly true
-        editor.setTheme 'ace/theme/textmate'
-        editor.setShowPrintMargin false
-        editor.setShowFoldWidgets false
-        editor.setHighlightActiveLine false
-        editor.setHighlightActiveLine false
-        editor.setBehavioursEnabled false
-        editor.renderer.setShowGutter false
-        editor.setValue contents
-        editor.clearSelection()
-        session = editor.getSession()
-        session.setUseWorker false
-        session.setMode SpellView.editModes[codeLanguage]
-        session.setWrapLimitRange null
-        session.setUseWrapMode true
-        session.setNewLineMode 'unix'
-        aceEditors.push editor
+        aceEditor = utils.initializeACE @, codeLanguage
+        aceEditors.push aceEditor

  onMouseEnter: (e) ->
    # Make sure the doc has the updated Thang so it can regenerate its prop value
--- a/app/views/play/level/tome/SpellView.coffee
+++ b/app/views/play/level/tome/SpellView.coffee
@ -9,6 +9,7 @@ SpellDebugView = require './SpellDebugView'
 SpellToolbarView = require './SpellToolbarView'
 LevelComponent = require 'models/LevelComponent'
 UserCodeProblem = require 'models/UserCodeProblem'
+utils = require 'core/utils'

 module.exports = class SpellView extends CocoView
  id: 'spell-view'
@ -18,14 +19,6 @@ module.exports = class SpellView extends CocoView
  eventsSuppressed: true
  writable: true

-  @editModes:
-    'javascript': 'ace/mode/javascript'
-    'coffeescript': 'ace/mode/coffee'
-    'python': 'ace/mode/python'
-    'clojure': 'ace/mode/clojure'
-    'lua': 'ace/mode/lua'
-    'io': 'ace/mode/text'
-
  keyBindings:
    'default': null
    'vim': 'ace/keyboard/vim'
@ -93,7 +86,7 @@ module.exports = class SpellView extends CocoView
    @aceSession = @ace.getSession()
    @aceDoc = @aceSession.getDocument()
    @aceSession.setUseWorker false
-    @aceSession.setMode SpellView.editModes[@spell.language]
+    @aceSession.setMode utils.aceEditModes[@spell.language]
    @aceSession.setWrapLimitRange null
    @aceSession.setUseWrapMode true
    @aceSession.setNewLineMode 'unix'
@ -479,7 +472,7 @@ module.exports = class SpellView extends CocoView

    # window.zatannaInstance = @zatanna  # For debugging. Make sure to not leave active when committing.
    # window.snippetEntries = snippetEntries
-    lang = SpellView.editModes[e.language].substr 'ace/mode/'.length
+    lang = utils.aceEditModes[e.language].substr 'ace/mode/'.length
    @zatanna.addSnippets snippetEntries, lang
    @editorLang = lang

@ -1138,8 +1131,8 @@ module.exports = class SpellView extends CocoView

  onChangeLanguage: (e) ->
    return unless @spell.canWrite()
-    @aceSession.setMode SpellView.editModes[e.language]
-    @zatanna?.set 'language', SpellView.editModes[e.language].substr('ace/mode/')
+    @aceSession.setMode utils.aceEditModes[e.language]
+    @zatanna?.set 'language', utils.aceEditModes[e.language].substr('ace/mode/')
    wasDefault = @getSource() is @spell.originalSource
    @spell.setLanguage e.language
    @reloadCode true if wasDefault
--- a/app/views/play/menu/GuideView.coffee
+++ b/app/views/play/menu/GuideView.coffee
@ -4,8 +4,6 @@ Article = require 'models/Article'
 SubscribeModal = require 'views/core/SubscribeModal'
 utils = require 'core/utils'

-# let's implement this once we have the docs database schema set up
-
 module.exports = class LevelGuideView extends CocoView
  template: template
  id: 'guide-view'
@ -41,10 +39,10 @@ module.exports = class LevelGuideView extends CocoView
    @docs = specific.concat(general)
    @docs = $.extend(true, [], @docs)
    @docs = [@docs[0]] if @firstOnly and @docs[0]
-    doc.html = marked(@filterCodeLanguages(utils.i18n(doc, 'body'))) for doc in @docs
+    doc.html = marked(utils.filterMarkdownCodeLanguages(utils.i18n(doc, 'body'))) for doc in @docs
    doc.name = (utils.i18n doc, 'name') for doc in @docs
    doc.slug = _.string.slugify(doc.name) for doc in @docs
-    super()
+    super options

  destroy: ->
    if @vimeoListenerAttached
@ -52,6 +50,7 @@ module.exports = class LevelGuideView extends CocoView
        window.removeEventListener('message', @onMessageReceived, false)
      else
        window.detachEvent('onmessage', @onMessageReceived, false)
+    oldEditor.destroy() for oldEditor in @aceEditors ? []
    super()

  getRenderData: ->
@ -70,13 +69,17 @@ module.exports = class LevelGuideView extends CocoView
      @$el.find('.nav-tabs li:first').addClass('active')
      @$el.find('.tab-content .tab-pane:first').addClass('active')
      @$el.find('.nav-tabs a').click(@clickTab)
+    @configureACEEditors()
    @playSound 'guide-open'

-  filterCodeLanguages: (text) ->
-    currentLanguage = me.get('aceConfig')?.language or 'python'
-    excludedLanguages = _.without ['javascript', 'python', 'coffeescript', 'clojure', 'lua', 'io'], currentLanguage
-    exclusionRegex = new RegExp "```(#{excludedLanguages.join('|')})\n[^`]+```\n?", 'gm'
-    text.replace exclusionRegex, ''
+  configureACEEditors: ->
+    oldEditor.destroy() for oldEditor in @aceEditors ? []
+    @aceEditors = []
+    aceEditors = @aceEditors
+    codeLanguage = me.get('aceConfig')?.language or 'python'
+    @$el.find('pre').each ->
+      aceEditor = utils.initializeACE @, codeLanguage
+      aceEditors.push aceEditor

  clickSubscribe: (e) ->
    level = @levelSlug # Save ref to level slug
--- a/package.json
+++ b/package.json
@ -37,6 +37,8 @@
    "brunch": "brunch",
    "bower": "bower",
    "dev": "brunch watch --server",
+    "nodemon": "nodemon",
+    "jasmine-node": "jasmine-node",
    "multicore": "coffee multicore.coffee",
    "nodemon": "nodemon"
  },
--- a/scripts/analytics/mongodb/queries/insertPerDayAnalytics.js
+++ b/scripts/analytics/mongodb/queries/insertPerDayAnalytics.js
@ -642,7 +642,13 @@ function getRecurringRevenueCounts(startDay) {
  var cursor = db.payments.find({_id: {$gte: startObj}});
  while (cursor.hasNext()) {
    var doc = cursor.next();
-    var day = doc._id.getTimestamp().toISOString().substring(0, 10);
+    var day;
+    if (doc.created) {
+      day = doc.created.substring(0, 10);
+    }
+    else {
+      day = doc._id.getTimestamp().toISOString().substring(0, 10);
+    }

    if (doc.service === 'ios' || doc.service === 'bitcoin') continue;

--- a/scripts/mongodb/migrations/2015-11-10-course-correction.js
+++ b/scripts/mongodb/migrations/2015-11-10-course-correction.js
@ -0,0 +1,34 @@
+var counts = {
+  hasClassroom: 0,
+  isOwn: 0,
+  migrated: 0
+};
+
+// script for generating codes
+// JSON.stringify(_.unique(_.map(_.range(1000), function() { return _.sample("abcdefghijklmnopqrstuvwxyz0123456789", 8).join('') })))
+var codes = 
+db.course.instances.find().forEach(function(courseInstance) {
+  if(courseInstance.classroomID) {
+    counts.hasClassroom += 1;
+    return;
+  }
+  if(courseInstance.ownerID && courseInstance.members && courseInstance.ownerID.equals(courseInstance.members[0]) && courseInstance.members.length === 1) {
+    counts.isOwn += 1;
+    return;
+  }
+
+  var id = ObjectId();
+
+  var newClassroom = {
+    members: courseInstance.members,
+    ownerID: courseInstance.ownerID,
+    description: courseInstance.description,
+    name: courseInstance.name,
+    code: codes.pop(),
+    _id: id
+  };
+  print('migrating', JSON.stringify(newClassroom, null, '\t'));
+  db.classrooms.save(newClassroom);
+  courseInstance.classroomID = id;
+  db.course.instances.save(courseInstance);
+});
--- a/server/classrooms/Classroom.coffee
+++ b/server/classrooms/Classroom.coffee
@ -0,0 +1,42 @@
+mongoose = require 'mongoose'
+log = require 'winston'
+config = require '../../server_config'
+plugins = require '../plugins/plugins'
+User = require '../users/User'
+jsonSchema = require '../../app/schemas/models/classroom.schema'
+
+ClassroomSchema = new mongoose.Schema {}, {strict: false, minimize: false, read:config.mongo.readpref}
+
+ClassroomSchema.statics.privateProperties = []
+ClassroomSchema.statics.editableProperties = [
+  'description'
+  'name'
+]
+
+ClassroomSchema.statics.generateNewCode = (done) ->
+  tryCode = ->
+    code = _.sample("abcdefghijklmnopqrstuvwxyz0123456789", 8).join('')
+    Classroom.findOne code: code, (err, classroom) ->
+      return done() if err
+      return done(code) unless classroom
+      tryCode()
+  tryCode()
+
+#ClassroomSchema.plugin plugins.NamedPlugin
+
+ClassroomSchema.pre('save', (next) ->
+  return next() if @get('code')
+  Classroom.generateNewCode (code) =>
+    @set 'code', code
+    next()
+)
+
+ClassroomSchema.methods.isOwner = (userID) ->
+  return userID.equals(@get('ownerID'))
+  
+ClassroomSchema.methods.isMember = (userID) ->
+  return _.any @get('members') or [], (memberID) -> userID.equals(memberID)
+
+ClassroomSchema.statics.jsonSchema = jsonSchema
+
+module.exports = Classroom = mongoose.model 'classroom', ClassroomSchema, 'classrooms'
--- a/server/classrooms/classroom_handler.coffee
+++ b/server/classrooms/classroom_handler.coffee
@ -0,0 +1,110 @@
+async = require 'async'
+mongoose = require 'mongoose'
+Handler = require '../commons/Handler'
+Classroom = require './Classroom'
+User = require '../users/User'
+sendwithus = require '../sendwithus'
+utils = require '../lib/utils'
+UserHandler = require '../users/user_handler'
+
+ClassroomHandler = class ClassroomHandler extends Handler
+  modelClass: Classroom
+  jsonSchema: require '../../app/schemas/models/classroom.schema'
+  allowedMethods: ['GET', 'POST', 'PUT', 'DELETE']
+
+  hasAccess: (req) ->
+    return false unless req.user
+    return true if req.method is 'GET'
+    req.method in @allowedMethods or req.user?.isAdmin()
+
+  hasAccessToDocument: (req, document, method=null) ->
+    return false unless document?
+    return true if req.user?.isAdmin()
+    return true if document.get('ownerID')?.equals req.user?._id
+    isGet = (method or req.method).toLowerCase() is 'get'
+    isMember = _.any(document.get('members') or [], (memberID) -> memberID.equals(req.user.get('_id')))
+    return true if isGet and isMember
+    false
+
+  makeNewInstance: (req) ->
+    instance = super(req)
+    instance.set 'ownerID', req.user._id
+    instance.set 'members', []
+    instance
+
+  getByRelationship: (req, res, args...) ->
+    method = req.method.toLowerCase()
+    return @inviteStudents(req, res, args[0]) if args[1] is 'invite-members'
+    return @joinClassroomAPI(req, res, args[0]) if method is 'post' and args[1] is 'members'
+    return @getMembersAPI(req, res, args[0]) if args[1] is 'members'
+    super(arguments...)
+
+  getMembersAPI: (req, res, classroomID) ->
+    Classroom.findById classroomID, (err, classroom) =>
+      return @sendDatabaseError(res, err) if err
+      return @sendNotFoundError(res) unless classroom
+      memberIDs = classroom.get('members') ? []
+      User.find {_id: {$in: memberIDs}}, (err, users) =>
+        return @sendDatabaseError(res, err) if err
+        cleandocs = (UserHandler.formatEntity(req, doc) for doc in users)
+        @sendSuccess(res, cleandocs)
+
+  joinClassroomAPI: (req, res, classroomID) ->
+    return @sendBadInputError(res, 'Need an object with a code') unless req.body?.code
+    Classroom.findOne {code: req.body.code}, (err, classroom) =>
+      return @sendDatabaseError(res, err) if err
+      return @sendNotFoundError(res) if not classroom
+      members = _.clone(classroom.get('members'))
+      if _.any(members, (memberID) -> memberID.equals(req.user.get('_id')))
+        return @sendSuccess(res, @formatEntity(req, classroom))
+      update = { $push: { members : req.user.get('_id')}}
+      classroom.update update, (err) =>
+        return @sendDatabaseError(res, err) if err
+        members.push req.user.get('_id')
+        classroom.set('members', members)
+        return @sendSuccess(res, @formatEntity(req, classroom))
+      
+  formatEntity: (req, doc) ->
+    if req.user?.isAdmin() or req.user?.get('_id').equals(doc.get('ownerID'))
+      return doc.toObject()
+    return _.omit(doc.toObject(), 'code')
+
+  inviteStudents: (req, res, classroomID) ->
+    if not req.body.emails
+      return @sendBadInputError(res, 'Emails not included')
+      
+    Classroom.findById classroomID, (err, classroom) =>
+      return @sendDatabaseError(res, err) if err
+      return @sendNotFoundError(res) unless classroom
+      return @sendForbiddenError(res) unless classroom.get('ownerID').equals(req.user.get('_id'))
+
+      for email in req.body.emails
+        context =
+          email_id: sendwithus.templates.course_invite_email
+          recipient:
+            address: email
+          email_data:
+            class_name: classroom.get('name')
+            # TODO: join_link
+            join_link: "https://codecombat.com/courses/students?_cc=" + classroom.get('code')
+        sendwithus.api.send context, _.noop
+      return @sendSuccess(res, {})
+      
+  get: (req, res) ->
+    if ownerID = req.query.ownerID
+      return @sendForbiddenError(res) unless req.user and (req.user.isAdmin() or ownerID is req.user.id)
+      return @sendBadInputError(res, 'Bad ownerID') unless utils.isID ownerID
+      Classroom.find {ownerID: mongoose.Types.ObjectId(ownerID)}, (err, classrooms) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendSuccess(res, (@formatEntity(req, classroom) for classroom in classrooms))
+    else if memberID = req.query.memberID
+      return @sendForbiddenError(res) unless req.user and (req.user.isAdmin() or memberID is req.user.id)
+      return @sendBadInputError(res, 'Bad memberID') unless utils.isID memberID
+      Classroom.find {members: mongoose.Types.ObjectId(memberID)}, (err, classrooms) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendSuccess(res, (@formatEntity(req, classroom) for classroom in classrooms))
+    else
+      super(arguments...)
+
+
+module.exports = new ClassroomHandler()
--- a/server/commons/mapping.coffee
+++ b/server/commons/mapping.coffee
@ -8,6 +8,7 @@ module.exports.handlers =
  'article': 'articles/article_handler'
  'campaign': 'campaigns/campaign_handler'
  'clan': 'clans/clan_handler'
+  'classroom': 'classrooms/classroom_handler'
  'course': 'courses/course_handler'
  'course_instance': 'courses/course_instance_handler'
  'level': 'levels/level_handler'
--- a/server/courses/CourseInstance.coffee
+++ b/server/courses/CourseInstance.coffee
@ -3,15 +3,24 @@ config = require '../../server_config'
 plugins = require '../plugins/plugins'
 jsonSchema = require '../../app/schemas/models/course_instance.schema'

-CourseInstanceSchema = new mongoose.Schema {}, {strict: false, minimize: false, read:config.mongo.readpref}
+CourseInstanceSchema = new mongoose.Schema {
+  ownerID: mongoose.Schema.Types.ObjectId
+  courseID: mongoose.Schema.Types.ObjectId
+  classroomID: mongoose.Schema.Types.ObjectId
+  prepaidID: mongoose.Schema.Types.ObjectId
+  members: [mongoose.Schema.Types.ObjectId]
+}, {strict: false, minimize: false, read:config.mongo.readpref}

 CourseInstanceSchema.statics.privateProperties = []
 CourseInstanceSchema.statics.editableProperties = [
  'description'
-  'members'
  'name'
  'aceConfig'
 ]
+CourseInstanceSchema.statics.postEditableProperties = [
+  'courseID'
+  'classroomID'
+]

 CourseInstanceSchema.statics.jsonSchema = jsonSchema

--- a/server/courses/course_instance_handler.coffee
+++ b/server/courses/course_instance_handler.coffee
@ -1,6 +1,7 @@
 async = require 'async'
 Handler = require '../commons/Handler'
 Campaign = require '../campaigns/Campaign'
+Classroom = require '../classrooms/Classroom'
 Course = require './Course'
 CourseInstance = require './CourseInstance'
 LevelSession = require '../levels/sessions/LevelSession'
@ -11,6 +12,7 @@ User = require '../users/User'
 UserHandler = require '../users/user_handler'
 utils = require '../../app/core/utils'
 sendwithus = require '../sendwithus'
+mongoose = require 'mongoose'

 CourseInstanceHandler = class CourseInstanceHandler extends Handler
  modelClass: CourseInstance
@ -30,63 +32,83 @@ CourseInstanceHandler = class CourseInstanceHandler extends Handler

  getByRelationship: (req, res, args...) ->
    relationship = args[1]
-    return @createAPI(req, res) if relationship is 'create'
+    return @createHOCAPI(req, res) if relationship is 'create-for-hoc'
    return @getLevelSessionsAPI(req, res, args[0]) if args[1] is 'level_sessions'
+    return @addMember(req, res, args[0]) if req.method is 'POST' and args[1] is 'members'
    return @getMembersAPI(req, res, args[0]) if args[1] is 'members'
    return @inviteStudents(req, res, args[0]) if relationship is 'invite_students'
    return @redeemPrepaidCodeAPI(req, res) if args[1] is 'redeem_prepaid'
    super arguments...

-  createAPI: (req, res) ->
+  createHOCAPI: (req, res) ->
    return @sendUnauthorizedError(res) if not req.user?
-    return @sendUnauthorizedError(res) if req.user.isAnonymous() and not (req.body.hourOfCode and req.body.courseID is '560f1a9f22961295f9427742')
+    courseID = mongoose.Types.ObjectId('560f1a9f22961295f9427742')
+    CourseInstance.findOne { courseID: courseID, ownerID: req.user.get('_id'), hourOfCode: true }, (err, courseInstance) =>
+      return @sendDatabaseError(res, err) if err
+      if courseInstance
+        console.log 'already made a course instance'
+      return @sendSuccess(res, courseInstance) if courseInstance
+      console.log 'making a new course instance'
+      courseInstance = new CourseInstance({
+        courseID: courseID
+        members: [req.user.get('_id')]
+        name: 'Single Player'
+        ownerID: req.user.get('_id')
+        aceConfig: { language: 'python' }
+        hourOfCode: true
+      })
+      courseInstance.save (err, courseInstance) =>
+        return @sendDatabaseError(res, err) if err
+        @sendCreated(res, courseInstance)
    
-    # Required Input
-    seats = req.body.seats
-    unless seats > 0
-      @logError(req.user, 'Course create API missing required seats count')
-      return @sendBadInputError(res, 'Missing required seats count')
-    # Optional - unspecified means create instances for all courses
-    courseID = req.body.courseID
-    # Optional
-    name = req.body.name
-    aceConfig = req.body.aceConfig or {}
-    # Optional - as long as course(s) are all free
-    stripeToken = req.body.stripe?.token
-
-    query = if courseID? then {_id: courseID} else {}
-    Course.find query, (err, courses) =>
-      if err
-        @logError(user, "Find courses error: #{JSON.stringify(err)}")
-        return done(err)
-
-      PrepaidHandler.purchasePrepaidCourse req.user, courses, seats, new Date().getTime(), stripeToken, (err, prepaid) =>
-        if err
-          @logError(req.user, err)
-          return @sendBadInputError(res, err) if err is 'Missing required Stripe token'
-          return @sendDatabaseError(res, err)
-
-        courseInstances = []
-        makeCreateInstanceFn = (course, name, prepaid, aceConfig) =>
-          (done) =>
-            @createInstance req, course, name, prepaid, aceConfig, (err, newInstance)=>
-              courseInstances.push newInstance unless err
-              done(err)
-        tasks = (makeCreateInstanceFn(course, name, prepaid, aceConfig) for course in courses)
-        async.parallel tasks, (err, results) =>
+  addMember: (req, res, courseInstanceID) ->
+    userID = req.body.userID
+    return @sendBadInputError(res, 'Input must be a MongoDB ID') unless utils.isID(userID)
+    CourseInstance.findById courseInstanceID, (err, courseInstance) =>
+      return @sendDatabaseError(res, err) if err
+      return @sendNotFoundError(res, 'Course instance not found') unless courseInstance
+      Classroom.findById courseInstance.get('classroomID'), (err, classroom) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendNotFoundError(res, 'Classroom referenced by course instance not found') unless classroom
+        return @sendForbiddenError(res) unless _.any(classroom.get('members'), (memberID) -> memberID.toString() is userID)
+        ownsCourseInstance = courseInstance.get('ownerID').equals(req.user.get('_id'))
+        addingSelf = userID is req.user.id
+        return @sendForbiddenError(res) unless ownsCourseInstance or addingSelf
+        alreadyInCourseInstance = _.any courseInstance.get('members') or [], (memberID) -> memberID.toString() is userID
+        return @sendSuccess(res, @formatEntity(req, courseInstance)) if alreadyInCourseInstance
+        Prepaid.find({ 'redeemers.userID': mongoose.Types.ObjectId(userID) }).count (err, userIsPrepaid) =>
          return @sendDatabaseError(res, err) if err
-          @sendCreated(res, courseInstances)
+          Course.findById courseInstance.get('courseID'), (err, course) =>
+            return @sendDatabaseError(res, err) if err
+            return @sendNotFoundError(res, 'Course referenced by course instance not found') unless course
+            if not (course.get('free') or userIsPrepaid)
+              return @sendPaymentRequiredError(res, 'Cannot add this user to a course instance until they are added to a prepaid')
+            members = courseInstance.get('members')
+            members.push(userID)
+            courseInstance.set('members', members)
+            courseInstance.save (err, courseInstance) =>
+              return @sendDatabaseError(res, err) if err
+              @sendSuccess(res, @formatEntity(req, courseInstance))
    
-  createInstance: (req, course, name, prepaid, aceConfig, done) =>
-    courseInstance = new CourseInstance
-      courseID: course.get('_id')
-      members: [req.user.get('_id')]
-      name: name
+  post: (req, res) ->
+    return @sendBadInputError(res, 'No classroomID') unless req.body.classroomID
+    return @sendBadInputError(res, 'No courseID') unless req.body.courseID
+    Classroom.findById req.body.classroomID, (err, classroom) =>
+      return @sendDatabaseError(res, err) if err
+      return @sendNotFoundError(res, 'Classroom not found') unless classroom
+      return @sendForbiddenError(res) unless classroom.get('ownerID').equals(req.user.get('_id'))
+      Course.findById req.body.courseID, (err, course) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendNotFoundError(res, 'Course not found') unless course
+        super(req, res)
+  
+  makeNewInstance: (req) ->
+    doc = new CourseInstance({
+      members: []
      ownerID: req.user.get('_id')
-      prepaidID: prepaid.get('_id')
-      aceConfig: aceConfig
-    courseInstance.save (err, newInstance) =>
-      done(err, newInstance)
+    })
+    doc.set('aceConfig', {}) # constructor will ignore empty objects
+    return doc

  getLevelSessionsAPI: (req, res, courseInstanceID) ->
    CourseInstance.findById courseInstanceID, (err, courseInstance) =>
@ -182,4 +204,28 @@ CourseInstanceHandler = class CourseInstanceHandler extends Handler
            return @sendDatabaseError(res, err) if err
            @sendSuccess(res, courseInstances)

+  get: (req, res) ->
+    if ownerID = req.query.ownerID
+      return @sendForbiddenError(res) unless req.user and (req.user.isAdmin() or ownerID is req.user.id)
+      return @sendBadInputError(res, 'Bad ownerID') unless utils.isID ownerID
+      CourseInstance.find {ownerID: mongoose.Types.ObjectId(ownerID)}, (err, courseInstances) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendSuccess(res, (@formatEntity(req, courseInstance) for courseInstance in courseInstances))
+    else if memberID = req.query.memberID
+      return @sendForbiddenError(res) unless req.user and (req.user.isAdmin() or memberID is req.user.id)
+      return @sendBadInputError(res, 'Bad memberID') unless utils.isID memberID
+      CourseInstance.find {members: mongoose.Types.ObjectId(memberID)}, (err, courseInstances) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendSuccess(res, (@formatEntity(req, courseInstance) for courseInstance in courseInstances))
+    else if classroomID = req.query.classroomID
+      return @sendForbiddenError(res) unless req.user
+      return @sendBadInputError(res, 'Bad memberID') unless utils.isID classroomID
+      Classroom.findById classroomID, (err, classroom) =>
+        return @sendForbiddenError(res) unless classroom.isMember(req.user._id) or classroom.isOwner(req.user._id)
+        CourseInstance.find {classroomID: mongoose.Types.ObjectId(classroomID)}, (err, courseInstances) =>
+          return @sendDatabaseError(res, err) if err
+          return @sendSuccess(res, (@formatEntity(req, courseInstance) for courseInstance in courseInstances))
+    else
+      super(arguments...)
+
 module.exports = new CourseInstanceHandler()
--- a/server/prepaids/Prepaid.coffee
+++ b/server/prepaids/Prepaid.coffee
@ -1,8 +1,11 @@
 mongoose = require 'mongoose'
 config = require '../../server_config'
-PrepaidSchema = new mongoose.Schema {}, {strict: false, minimize: false,read:config.mongo.readpref}
+PrepaidSchema = new mongoose.Schema {
+  creator: mongoose.Schema.Types.ObjectId
+}, {strict: false, minimize: false,read:config.mongo.readpref}

 PrepaidSchema.index({code: 1}, { unique: true })
+PrepaidSchema.index({'redeemers.userID': 1})

 PrepaidSchema.statics.generateNewCode = (done) ->
  tryCode = ->
@ -13,4 +16,21 @@ PrepaidSchema.statics.generateNewCode = (done) ->
      tryCode()
  tryCode()
  
+PrepaidSchema.pre('save', (next) ->
+  @set('exhausted', @get('maxRedeemers') <= _.size(@get('redeemers')))
+  if not @get('code')
+    Prepaid.generateNewCode (code) =>
+      @set('code', code)
+      next()
+  else
+    next()
+)
+
+PrepaidSchema.post 'init', (doc) ->
+  doc.set('maxRedeemers', parseInt(doc.get('maxRedeemers')))
+
+PrepaidSchema.statics.postEditableProperties = [
+  'creator', 'maxRedeemers', 'type'
+]
+
 module.exports = Prepaid = mongoose.model('prepaid', PrepaidSchema)
--- a/server/prepaids/prepaid_handler.coffee
+++ b/server/prepaids/prepaid_handler.coffee
@ -2,12 +2,16 @@ Course = require '../courses/Course'
 Handler = require '../commons/Handler'
 hipchat = require '../hipchat'
 Prepaid = require './Prepaid'
+User = require '../users/User'
 StripeUtils = require '../lib/stripe_utils'
 utils = require '../../app/core/utils'
+mongoose = require 'mongoose'

 # TODO: Should this happen on a save() call instead of a prepaid/-/create post?
 # TODO: Probably a better way to create a unique 8 charactor string property using db voodoo

+cutoffID = mongoose.Types.ObjectId('5642877accc6494a01cc6bfe')
+
 PrepaidHandler = class PrepaidHandler extends Handler
  modelClass: Prepaid
  jsonSchema: require '../../app/schemas/models/prepaid.schema'
@ -26,6 +30,7 @@ PrepaidHandler = class PrepaidHandler extends Handler
    return @getPrepaidAPI(req, res, args[2]) if relationship is 'code'
    return @createPrepaidAPI(req, res) if relationship is 'create'
    return @purchasePrepaidAPI(req, res) if relationship is 'purchase'
+    return @postRedeemerAPI(req, res, args[0]) if relationship is 'redeemers'
    super arguments...

  getPrepaidAPI: (req, res, code) ->
@ -44,7 +49,7 @@ PrepaidHandler = class PrepaidHandler extends Handler
  createPrepaidAPI: (req, res) ->
    return @sendForbiddenError(res) unless @hasAccess(req)
    return @sendForbiddenError(res) unless req.body.type in ['course', 'subscription','terminal_subscription']
-    return @sendForbiddenError(res) unless req.body.maxRedeemers > 0
+    return @sendForbiddenError(res) unless parseInt(req.body.maxRedeemers) > 0

    properties = {}
    type = req.body.type
@ -61,6 +66,44 @@ PrepaidHandler = class PrepaidHandler extends Handler
      return @sendDatabaseError(res, err) if err
      @sendSuccess(res, prepaid.toObject())

+  postRedeemerAPI: (req, res, prepaidID) ->
+    return @sendForbiddenError(res) if prepaidID.toString() < cutoffID.toString()
+    return @sendMethodNotAllowed(res, 'You may only POST redeemers.') if req.method isnt 'POST'
+    return @sendBadInputError(res, 'Need an object with a userID') unless req.body?.userID
+    Prepaid.findById(prepaidID).exec (err, prepaid) =>
+      return @sendDatabaseError(res, err) if err
+      return @sendNotFoundError(res) if not prepaid
+      return @sendForbiddenError(res) if prepaid.get('creator').toString() isnt req.user.id
+      return @sendForbiddenError(res) if _.size(prepaid.get('redeemers')) >= prepaid.get('maxRedeemers')
+      return @sendForbiddenError(res) unless prepaid.get('type') is 'course'
+      User.findById(req.body.userID).exec (err, user) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendNotFoundError(res, 'User for given ID not found') if not user
+        userID = user.get('_id')
+#        Prepaid.count {'redeemers.userID': userID}, (err, count) =>
+#          return @sendDatabaseError(res, err) if err
+#          return @sendSuccess(res, @formatEntity(req, prepaid)) if count
+
+        query =
+          _id: prepaid.get('_id')
+          'redeemers.userID': { $ne: req.user.get('_id') }
+          $where: "this.redeemers.length < #{prepaid.get('maxRedeemers')}"
+        update = { $push: { redeemers : { date: new Date(), userID: userID } }}
+        Prepaid.update query, update, (err, nMatched) =>
+          return @sendDatabaseError(res, err) if err
+          if nMatched is 0
+            @logError(req.user, "POST prepaid redeemer lost race on maxRedeemers")
+            return @sendForbiddenError(res)
+            
+          user.set('coursePrepaidID', prepaid.get('_id'))
+          user.save (err, user) =>
+            return @sendDatabaseError(res, err) if err
+            # return prepaid with new redeemer added locally
+            redeemers = _.clone(prepaid.get('redeemers') or [])
+            redeemers.push({ date: new Date(), userID: userID })
+            prepaid.set('redeemers', redeemers)
+            @sendSuccess(res, @formatEntity(req, prepaid))      
+
  createPrepaid: (user, type, maxRedeemers, properties, done) ->
    Prepaid.generateNewCode (code) =>
      return done('Database error.') unless code
@ -68,7 +111,7 @@ PrepaidHandler = class PrepaidHandler extends Handler
        creator: user._id
        type: type
        code: code
-        maxRedeemers: maxRedeemers
+        maxRedeemers: parseInt(maxRedeemers)
        properties: properties
        redeemers: []

@ -97,40 +140,30 @@ PrepaidHandler = class PrepaidHandler extends Handler
        @sendSuccess(res, prepaid.toObject())

    else if req.body.type is 'course'
-      courseID = req.body.courseID
-
      maxRedeemers = parseInt(req.body.maxRedeemers)
      timestamp = req.body.stripe?.timestamp
      token = req.body.stripe?.token

      return @sendBadInputError(res) unless isNaN(maxRedeemers) is false and maxRedeemers > 0

-      query = if courseID? then {_id: courseID} else {}
-      Course.find query, (err, courses) =>
-        if err
-          @logError(user, "Find courses error: #{JSON.stringify(err)}")
-          return done(err)
-
-        @purchasePrepaidCourse req.user, courses, maxRedeemers, timestamp, token, (err, prepaid) =>
-          # TODO: this badinput detection is fragile, in course instance handler as well
-          return @sendBadInputError(res, err) if err is 'Missing required Stripe token'
-          return @sendDatabaseError(res, err) if err
-          @sendSuccess(res, prepaid.toObject())
+      @purchasePrepaidCourse req.user, maxRedeemers, timestamp, token, (err, prepaid) =>
+        # TODO: this badinput detection is fragile, in course instance handler as well
+        return @sendBadInputError(res, err) if err is 'Missing required Stripe token'
+        return @sendDatabaseError(res, err) if err
+        @sendSuccess(res, prepaid.toObject())
    else
      @sendForbiddenError(res)

-  purchasePrepaidCourse: (user, courses, maxRedeemers, timestamp, token, done) ->
+  purchasePrepaidCourse: (user, maxRedeemers, timestamp, token, done) ->
    type = 'course'

-    courseIDs = (c.get('_id') for c in courses)
-    coursePrices = (c.get('pricePerSeat') for c in courses)
-    amount = utils.getCourseBundlePrice(coursePrices, maxRedeemers)
+    amount = maxRedeemers * 400
    if amount > 0 and not (token or user.isAdmin())
      @logError(user, "Purchase prepaid courses missing required Stripe token #{amount}")
      return done('Missing required Stripe token')

    if amount is 0 or user.isAdmin()
-      @createPrepaid(user, type, maxRedeemers, courseIDs: courseIDs, done)
+      @createPrepaid(user, type, maxRedeemers, {}, done)

    else
      StripeUtils.getCustomer user, token, (err, customer) =>
@ -142,10 +175,8 @@ PrepaidHandler = class PrepaidHandler extends Handler
          type: type
          userID: user.id
          timestamp: parseInt(timestamp)
-          description: if courses.length is 1 then courses[0].get('name') else 'All Courses'
          maxRedeemers: maxRedeemers
          productID: "prepaid #{type}"
-          courseIDs: courseIDs

        StripeUtils.createCharge user, amount, metadata, (err, charge) =>
          if err
@ -156,9 +187,9 @@ PrepaidHandler = class PrepaidHandler extends Handler
            if err
              @logError(user, "createPayment error: #{JSON.stringify(err)}")
              return done(err)
-            msg = "Prepaid code purchased: #{type} seats=#{maxRedeemers} courseIDs=#{courseIDs} #{user.get('email')}"
+            msg = "Prepaid code purchased: #{type} seats=#{maxRedeemers} #{user.get('email')}"
            hipchat.sendHipChatMessage msg, ['tower']
-            @createPrepaid(user, type, maxRedeemers, courseIDs: courseIDs, done)
+            @createPrepaid(user, type, maxRedeemers, {}, done)

  purchasePrepaidTerminalSubscription: (user, description, maxRedeemers, months, timestamp, token, done) ->
    type = 'terminal_subscription'
@ -195,7 +226,7 @@ PrepaidHandler = class PrepaidHandler extends Handler
              creator: user._id
              type: type
              code: code
-              maxRedeemers: maxRedeemers
+              maxRedeemers: parseInt(maxRedeemers)
              redeemers: []
              properties:
                months: months
@ -205,4 +236,25 @@ PrepaidHandler = class PrepaidHandler extends Handler
              hipchat.sendHipChatMessage msg, ['tower']
              return done(null, prepaid)

+
+  get: (req, res) ->
+    if creator = req.query.creator
+      return @sendForbiddenError(res) unless req.user and (req.user.isAdmin() or creator is req.user.id)
+      return @sendBadInputError(res, 'Bad creator') unless utils.isID creator
+      q = {
+        _id: {$gt: cutoffID}
+        creator: mongoose.Types.ObjectId(creator),
+        type: 'course'
+      }
+      Prepaid.find q, (err, prepaids) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendSuccess(res, (@formatEntity(req, prepaid) for prepaid in prepaids))
+    else
+      super(arguments...)
+
+  makeNewInstance: (req) ->
+    prepaid = super(req)
+    prepaid.set('redeemers', [])
+    return prepaid
+      
 module.exports = new PrepaidHandler()
--- a/test/server/common.coffee
+++ b/test/server/common.coffee
@ -32,6 +32,7 @@ models_path = [
  '../../server/articles/Article'
  '../../server/campaigns/Campaign'
  '../../server/clans/Clan'
+  '../../server/classrooms/Classroom'
  '../../server/courses/Course'
  '../../server/courses/CourseInstance'
  '../../server/levels/Level'
@ -163,8 +164,6 @@ GLOBAL.purchasePrepaid = (type, properties, maxRedeemers, token, done) ->
  options.json.stripe.token = token if token?
  if type is 'terminal_subscription'
    options.json.months = properties.months
-  else if type is 'course'
-    options.json.courseID = properties.courseID if properties?.courseID
  request.post options, done

 GLOBAL.subscribeWithPrepaid = (ppc, done) =>
--- a/test/server/functional/classrooms.spec.coffee
+++ b/test/server/functional/classrooms.spec.coffee
@ -0,0 +1,149 @@
+config = require '../../../server_config'
+require '../common'
+utils = require '../../../app/core/utils' # Must come after require /common
+mongoose = require 'mongoose'
+
+classroomsURL = getURL('/db/classroom')
+
+describe 'GET /db/classroom?ownerID=:id', ->
+  it 'clears database users and classrooms', (done) ->
+    clearModels [User, Classroom], (err) ->
+      throw err if err
+      done()
+      
+  it 'returns an array of classrooms with the given owner', (done) ->
+    loginNewUser (user1) ->
+      new Classroom({name: 'Classroom 1', ownerID: user1.get('_id') }).save (err, classroom) ->
+        expect(err).toBeNull()
+        loginNewUser (user2) ->
+          new Classroom({name: 'Classroom 2', ownerID: user2.get('_id') }).save (err, classroom) ->
+            expect(err).toBeNull()
+            url = getURL('/db/classroom?ownerID='+user2.id)
+            request.get { uri: url, json: true }, (err, res, body) ->
+              expect(res.statusCode).toBe(200)
+              expect(body.length).toBe(1)
+              expect(body[0].name).toBe('Classroom 2')
+              done()
+              
+  it 'returns 403 when a non-admin tries to get classrooms for another user', (done) ->
+    loginNewUser (user1) ->
+      loginNewUser (user2) ->
+        url = getURL('/db/classroom?ownerID='+user1.id)
+        request.get { uri: url }, (err, res, body) ->
+          expect(res.statusCode).toBe(403)
+          done()
+  
+
+describe 'GET /db/classroom/:id', ->
+  it 'clears database users and classrooms', (done) ->
+    clearModels [User, Classroom], (err) ->
+      throw err if err
+      done()
+
+  it 'returns the classroom for the given id', (done) ->
+    loginNewUser (user1) ->
+      data = { name: 'Classroom 1' }
+      request.post {uri: classroomsURL, json: data }, (err, res, body) ->
+        expect(res.statusCode).toBe(200)
+        classroomID = body._id
+        request.get {uri: classroomsURL + '/'  + body._id }, (err, res, body) ->
+          expect(res.statusCode).toBe(200)
+          expect(body._id).toBe(classroomID = body._id)
+          done()
+
+describe 'POST /db/classroom', ->
+  
+  it 'clears database users and classrooms', (done) ->
+    clearModels [User, Classroom], (err) ->
+      throw err if err
+      done()
+
+  it 'creates a new classroom for the given user', (done) ->
+    loginNewUser (user1) ->
+      data = { name: 'Classroom 1' }
+      request.post {uri: classroomsURL, json: data }, (err, res, body) ->
+        expect(res.statusCode).toBe(200)
+        expect(body.name).toBe('Classroom 1')
+        expect(body.members.length).toBe(0)
+        expect(body.ownerID).toBe(user1.id)
+        done()
+        
+  it 'does not work for anonymous users', (done) ->
+    logoutUser ->
+      data = { name: 'Classroom 2' }
+      request.post {uri: classroomsURL, json: data }, (err, res, body) ->
+        expect(res.statusCode).toBe(401)
+        done()
+        
+        
+describe 'PUT /db/classroom', ->
+
+  it 'clears database users and classrooms', (done) ->
+    clearModels [User, Classroom], (err) ->
+      throw err if err
+      done()
+
+  it 'edits name and description', (done) ->
+    loginNewUser (user1) ->
+      data = { name: 'Classroom 2' }
+      request.post {uri: classroomsURL, json: data }, (err, res, body) ->
+        expect(res.statusCode).toBe(200)
+        data = { name: 'Classroom 3', description: 'New Description' }
+        url = classroomsURL + '/' + body._id
+        request.put { uri: url, json: data }, (err, res, body) ->
+          expect(body.name).toBe('Classroom 3')
+          expect(body.description).toBe('New Description')
+          done()
+          
+  it 'is not allowed if you are just a member', (done) ->
+    loginNewUser (user1) ->
+      data = { name: 'Classroom 4' }
+      request.post {uri: classroomsURL, json: data }, (err, res, body) ->
+        expect(res.statusCode).toBe(200)
+        classroomCode = body.code
+        loginNewUser (user2) ->
+          url = getURL("/db/classroom/~/members")
+          data = { code: classroomCode }
+          request.post { uri: url, json: data }, (err, res, body) ->
+            expect(res.statusCode).toBe(200)
+            url = classroomsURL + '/' + body._id
+            request.put { uri: url, json: data }, (err, res, body) ->
+              expect(res.statusCode).toBe(403)
+              done()
+            
+describe 'POST /db/classroom/:id/members', ->
+
+  it 'clears database users and classrooms', (done) ->
+    clearModels [User, Classroom], (err) ->
+      throw err if err
+      done()
+
+  it 'adds the signed in user to the list of members in the classroom', (done) ->
+    loginNewUser (user1) ->
+      data = { name: 'Classroom 5' }
+      request.post {uri: classroomsURL, json: data }, (err, res, body) ->
+        classroomCode = body.code
+        classroomID = body._id
+        expect(res.statusCode).toBe(200)
+        loginNewUser (user2) ->
+          url = getURL("/db/classroom/~/members")
+          data = { code: classroomCode }
+          request.post { uri: url, json: data }, (err, res, body) ->
+            expect(res.statusCode).toBe(200)
+            Classroom.findById classroomID, (err, classroom) ->
+              expect(classroom.get('members').length).toBe(1)
+              done()
+
+
+describe 'POST /db/classroom/:id/invite-members', ->
+
+  it 'takes a list of emails and sends invites', (done) ->
+    loginNewUser (user1) ->
+      data = { name: 'Classroom 6' }
+      request.post {uri: classroomsURL, json: data }, (err, res, body) ->
+        expect(res.statusCode).toBe(200)
+        url = classroomsURL + '/' + body._id + '/invite-members'
+        data = { emails: ['test@test.com'] }
+        request.post { uri: url, json: data }, (err, res, body) ->
+          expect(res.statusCode).toBe(200)
+          done()
--- a/test/server/functional/course_instance.spec.coffee
+++ b/test/server/functional/course_instance.spec.coffee
@ -2,353 +2,158 @@ async = require 'async'
 config = require '../../../server_config'
 require '../common'
 stripe = require('stripe')(config.stripe.secretKey)
+init = require '../init'

-# TODO: add permissiosn tests
+describe 'POST /db/course_instance', ->

-describe 'CourseInstance', ->
-  courseInstanceCreateURL = getURL('/db/course_instance/-/create')
-  courseInstanceRedeemURL = getURL('/db/course_instance/-/redeem_prepaid')
-  userURL = getURL('/db/user')
+  beforeEach (done) -> clearModels([CourseInstance, Course, User, Classroom], done)
+  beforeEach (done) -> loginJoe (@joe) => done()
+  beforeEach init.course()
+  beforeEach init.classroom()
  
-  createCourseInstances = (user, courseID, seats, token, done) ->
-    name = createName 'course instance '
-    requestBody =
-      courseID: courseID
-      name: name
-      seats: seats
-      stripe:
-        token: token
-    request.post {uri: courseInstanceCreateURL, json: requestBody }, (err, res) ->
-      expect(err).toBeNull()
-      expect(res.statusCode).toBe(201)
-      CourseInstance.find {name: name}, (err, courseInstances) ->
-        expect(err).toBeNull()
-
-        makeCourseInstanceVerifyFn = (courseInstance) ->
-          (done) ->
-            expect(courseInstance.get('name')).toEqual(name)
-            expect(courseInstance.get('ownerID')).toEqual(user.get('_id'))
-            expect(courseInstance.get('members')).toContain(user.get('_id'))
-            query = {$and: [{creator: user.get('_id')}]}
-            query.$and.push {'properties.courseIDs': {$in: [courseID]}} if courseID
-            Prepaid.find query, (err, prepaids) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(prepaids?.length).toEqual(1)
-              return done() unless prepaids?.length > 0
-              expect(prepaids[0].get('type')).toEqual('course')
-              expect(prepaids[0].get('maxRedeemers')).toEqual(seats) if seats
-
-              # TODO: verify Payment
-
-              done(err)
-
-        tasks = []
-        for courseInstance in courseInstances
-          tasks.push makeCourseInstanceVerifyFn(courseInstance)
-        async.parallel tasks, (err) =>
-          return done(err) if err
-          done(err, courseInstances)
-
-  it 'Clear database', (done) ->
-    clearModels [User, Course, CourseInstance, Prepaid], (err) ->
-      throw err if err
+  it 'creates a CourseInstance', (done) ->
+    test = @
+    url = getURL('/db/course_instance')
+    data = {
+      name: 'Some Name'
+      courseID: test.course.id
+      classroomID: test.classroom.id
+    }
+    request.post {uri: url, json: data}, (err, res, body) ->
+      expect(res.statusCode).toBe(200)
+      expect(body.classroomID).toBeDefined()
      done()
      
-  describe 'Single courses', ->
-    it 'Create for free course 1 seat', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 0, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourseInstances user1, course.get('_id'), 1, token.id, (err, courseInstances) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(courseInstances.length).toEqual(1)
-              done()
+  it 'returns 404 if the Course does not exist', (done) ->
+    test = @
+    url = getURL('/db/course_instance')
+    data = {
+      name: 'Some Name'
+      courseID: '123456789012345678901234'
+      classroomID: test.classroom.id
+    }
+    request.post {uri: url, json: data}, (err, res, body) ->
+      expect(res.statusCode).toBe(404)
+      done()

-    it 'Create for free course no seats', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 0, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            name = createName 'course instance '
-            requestBody =
-              courseID: course.get('_id')
-              name: createName('course instance ')
-            request.post {uri: courseInstanceCreateURL, json: requestBody }, (err, res) ->
-              expect(err).toBeNull()
-              expect(res.statusCode).toBe(422)
-              done()
+  it 'returns 404 if the Classroom does not exist', (done) ->
+    test = @
+    url = getURL('/db/course_instance')
+    data = {
+      name: 'Some Name'
+      courseID: test.course.id
+      classroomID: '123456789012345678901234'
+    }
+    request.post {uri: url, json: data}, (err, res, body) ->
+      expect(res.statusCode).toBe(404)
+      done()
      
-    it 'Create for free course no token', (done) ->
-      loginNewUser (user1) ->
-        createCourse 0, (err, course) ->
-          expect(err).toBeNull()
-          return done(err) if err
-          createCourseInstances user1, course.get('_id'), 2, null, (err, courseInstances) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            expect(courseInstances.length).toEqual(1)
-            done()
+  it 'return 403 if the logged in user does not own the Classroom', (done) ->
+    test = @
+    loginSam ->
+      url = getURL('/db/course_instance')
+      data = {
+        name: 'Some Name'
+        courseID: test.course.id
+        classroomID: test.classroom.id
+      }
+      request.post {uri: url, json: data}, (err, res, body) ->
+        expect(res.statusCode).toBe(403)
+        done()
      
-    it 'Create for paid course 1 seat', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 7000, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourseInstances user1, course.get('_id'), 1, token.id, (err, courseInstances) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(courseInstances.length).toEqual(1)
-              Prepaid.findById courseInstances[0].get('prepaidID'), (err, prepaid) ->
-                expect(err).toBeNull()
-                return done(err) if err
-                expect(prepaid.get('maxRedeemers')).toEqual(1)
-                expect(prepaid.get('properties')?.courseIDs).toEqual([course.get('_id')])
-                done()
      
-    it 'Create for paid course 50 seats', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 7000, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourseInstances user1, course.get('_id'), 50, token.id, (err, courseInstances) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(courseInstances.length).toEqual(1)
-              Prepaid.findById courseInstances[0].get('prepaidID'), (err, prepaid) ->
-                expect(err).toBeNull()
-                return done(err) if err
-                expect(prepaid.get('maxRedeemers')).toEqual(50)
-                expect(prepaid.get('properties')?.courseIDs).toEqual([course.get('_id')])
-                done()
+describe 'POST /db/course_instance/:id/members', ->
  
-    it 'Create for paid course no token', (done) ->
-      loginNewUser (user1) ->
-        createCourse 7000, (err, course) ->
-          expect(err).toBeNull()
-          return done(err) if err
-          name = createName 'course instance '
-          requestBody =
-            courseID: course.get('_id')
-            name: createName('course instance ')
-            seats: 1
-          request.post {uri: courseInstanceCreateURL, json: requestBody }, (err, res) ->
-            expect(err).toBeNull()
-            expect(res.statusCode).toBe(422)
-            done()
+  beforeEach (done) -> clearModels([CourseInstance, Course, User, Classroom, Prepaid], done)
+  beforeEach (done) -> loginJoe (@joe) => done()
+  beforeEach init.course({free: true})
+  beforeEach init.classroom()
+  beforeEach init.courseInstance()
+  beforeEach init.user()
+  beforeEach init.prepaid()
  
-    it 'Create for paid course -1 seats', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 7000, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            name = createName 'course instance '
-            requestBody =
-              courseID: course.get('_id')
-              name: createName('course instance ')
-              seats: -1
-            request.post {uri: courseInstanceCreateURL, json: requestBody }, (err, res) ->
-              expect(err).toBeNull()
-              expect(res.statusCode).toBe(422)
-              done()
+  it 'adds a member to the given CourseInstance', (done) ->
+    async.eachSeries([
      
-  describe 'All Courses', ->
-    it 'Create for 50 seats', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 7000, (err, course1) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourse 7000, (err, course2) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              createCourseInstances user1, null, 50, token.id, (err, courseInstances) ->
-                expect(err).toBeNull()
-                return done(err) if err
-                Course.find {}, (err, courses) ->
-                  expect(err).toBeNull()
-                  return done(err) if err
-                  expect(courseInstances.length).toEqual(courses.length)
-                  Prepaid.find creator: user1.get('_id'), (err, prepaids) ->
-                    expect(err).toBeNull()
-                    return done(err) if err
-                    expect(prepaids.length).toEqual(1)
-                    return done('no prepaids found') unless prepaids?.length > 0
-                    prepaid = prepaids[0]
-                    expect(prepaid.get('maxRedeemers')).toEqual(50)
-                    expect(prepaid.get('properties')?.courseIDs?.length).toEqual(courses.length)
-                    done()
+      addTestUserToClassroom,
+      (test, cb) ->
+        url = getURL("/db/course_instance/#{test.courseInstance.id}/members")
+        request.post {uri: url, json: {userID: test.user.id}}, (err, res, body) ->
+          expect(res.statusCode).toBe(200)
+          expect(body.members.length).toBe(1)
+          expect(body.members[0]).toBe(test.user.id)
+          cb()
          
-  describe 'Invite to course', ->
-    it 'takes a list of emails and sends invites', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 0, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourseInstances user1, course.get('_id'), 1, token.id, (err, courseInstances) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(courseInstances.length).toEqual(1)
-              inviteStudentsURL = getURL("/db/course_instance/#{courseInstances[0]._id}/invite_students")
-              requestBody = {
-                emails: ['test@test.com']
-              }
-              request.post { uri: inviteStudentsURL, json: requestBody }, (err, res) ->
-                expect(err).toBeNull()
-                expect(res.statusCode).toBe(200)
-                done()
+    ], makeTestIterator(@), done)
      
-  describe 'Redeem prepaid code', ->
    
-    it 'Redeem prepaid code for an instance of max 2', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 0, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourseInstances user1, course.get('_id'), 2, token.id, (err, courseInstances) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(courseInstances.length).toEqual(1)
-              Prepaid.findById courseInstances[0].get('prepaidID'), (err, prepaid) ->
-                expect(err).toBeNull()
-                return done(err) if err
-                loginNewUser (user2) ->
-                  request.post {uri: courseInstanceRedeemURL, json: {prepaidCode: prepaid.get('code')} }, (err, res) ->
-                    expect(err).toBeNull()
-                    expect(res.statusCode).toBe(200)
+  it 'return 403 if the member is not in the classroom', (done) ->
+    async.eachSeries([
      
-                    # Check prepaid
-                    Prepaid.findById prepaid.id, (err, prepaid) ->
-                      expect(err).toBeNull()
-                      return done(err) if err
-                      expect(prepaid.get('redeemers')?.length).toEqual(1)
-                      expect(prepaid.get('redeemers')[0].date).toBeLessThan(new Date())
-                      expect(prepaid.get('redeemers')[0].userID).toEqual(user2.get('_id'))
+      (test, cb) ->
+        url = getURL("/db/course_instance/#{test.courseInstance.id}/members")
+        request.post {uri: url, json: {userID: test.user.id}}, (err, res) ->
+          expect(res.statusCode).toBe(403)
+          cb()
          
-                      # Check course instance
-                      CourseInstance.findById courseInstances[0].id, (err, courseInstance) ->
-                        expect(err).toBeNull()
-                        return done(err) if err
-                        members = courseInstance.get('members')
-                        expect(members?.length).toEqual(2)
-                        # TODO: must be a better way to check membership
-                        usersFound = 0
-                        for memberID in members
-                          usersFound++ if memberID.equals(user1.get('_id'))
-                          usersFound++ if memberID.equals(user2.get('_id'))
-                        expect(usersFound).toEqual(2)
-                        done()
+    ], makeTestIterator(@), done)
    
-    it 'Redeem full prepaid code for on instance of max 1', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 0, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourseInstances user1, course.get('_id'), 1, token.id, (err, courseInstances) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(courseInstances.length).toEqual(1)
-              Prepaid.findById courseInstances[0].get('prepaidID'), (err, prepaid) ->
-                expect(err).toBeNull()
-                return done(err) if err
-                loginNewUser (user2) ->
-                  request.post {uri: courseInstanceRedeemURL, json: {prepaidCode: prepaid.get('code')} }, (err, res) ->
-                    expect(err).toBeNull()
-                    expect(res.statusCode).toBe(200)
-                    loginNewUser (user3) ->
-                      request.post {uri: courseInstanceRedeemURL, json: {prepaidCode: prepaid.get('code')} }, (err, res) ->
-                        expect(err).toBeNull()
-                        expect(res.statusCode).toBe(403)
-                        done()
    
-    it 'Redeem 50 count course prepaid codes 51 times, in parallel', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        seatCount = 50
-        loginNewUser (user1) ->
-          createCourse 0, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourseInstances user1, course.get('_id'), seatCount, token.id, (err, courseInstances) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(courseInstances.length).toEqual(1)
-              Prepaid.findById courseInstances[0].get('prepaidID'), (err, prepaid) ->
-                expect(err).toBeNull()
-                return done(err) if err
+  it 'returns 403 if the user does not own the course instance and is not adding self', (done) ->
+    async.eachSeries([

-                forbiddenResults = 0
-                makeRedeemCall = ->
-                  (callback) ->
-                    loginNewUser (user2) ->
-                      request.post {uri: courseInstanceRedeemURL, json: {prepaidCode: prepaid.get('code')} }, (err, res) ->
-                        expect(err).toBeNull()
-                        if res.statusCode is 403
-                          forbiddenResults++
-                        else
-                          expect(res.statusCode).toBe(200)
-                        callback err
-                tasks = (makeRedeemCall() for i in [1..seatCount+1])
-                async.parallel tasks, (err, results) ->
-                  expect(err?).toEqual(false)
-                  expect(forbiddenResults).toEqual(1)
-                  Prepaid.findById courseInstances[0].get('prepaidID'), (err, prepaid) ->
-                    expect(err).toBeNull()
-                    return done(err) if err
-                    expect(prepaid.get('redeemers')?.length).toEqual(prepaid.get('maxRedeemers'))
-                    done()
+      addTestUserToClassroom,
+      (test, cb) ->
+        loginSam ->
+          url = getURL("/db/course_instance/#{test.courseInstance.id}/members")
+          request.post {uri: url, json: {userID: test.user.id}}, (err, res, body) ->
+            expect(res.statusCode).toBe(403)
+            cb()
+
+    ], makeTestIterator(@), done)
+    
+  it 'returns 200 if the user is a member of the classroom and is adding self', ->
+
+  it 'return 402 if the course is not free and the user is not in a prepaid', (done) ->
+    async.eachSeries([
+      
+      addTestUserToClassroom,
+      makeTestCourseNotFree,
+      (test, cb) ->
+        url = getURL("/db/course_instance/#{test.courseInstance.id}/members")
+        request.post {uri: url, json: {userID: test.user.id}}, (err, res) ->
+          expect(res.statusCode).toBe(402)
+          cb()
+          
+    ], makeTestIterator(@), done)
+          
+    
+  it 'works if the course is not free and the user is in a prepaid', (done) ->
+    async.eachSeries([
+    
+      addTestUserToClassroom,
+      makeTestCourseNotFree,
+      addTestUserToPrepaid,
+      (test, cb) ->
+        url = getURL("/db/course_instance/#{test.courseInstance.id}/members")
+        request.post {uri: url, json: {userID: test.user.id}}, (err, res) ->
+          expect(res.statusCode).toBe(200)
+          cb()
+          
+    ], makeTestIterator(@), done)
+    
+    
+  makeTestCourseNotFree = (test, cb) ->
+    test.course.set('free', false)
+    test.course.save cb
+        
+  addTestUserToClassroom = (test, cb) ->
+    test.classroom.set('members', [test.user.get('_id')])
+    test.classroom.save cb
+
+  addTestUserToPrepaid = (test, cb) ->
+    test.prepaid.set('redeemers', [{userID: test.user.get('_id')}])
+    test.prepaid.save cb
+
+makeTestIterator = (testObject) -> (func, callback) -> func(testObject, callback)
  
-    it 'Redeem prepaid code twice', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 0, (err, course) ->
-            expect(err).toBeNull()
-            return done(err) if err
-            createCourseInstances user1, course.get('_id'), 2, token.id, (err, courseInstances) ->
-              expect(err).toBeNull()
-              return done(err) if err
-              expect(courseInstances.length).toEqual(1)
-              Prepaid.findById courseInstances[0].get('prepaidID'), (err, prepaid) ->
-                expect(err).toBeNull()
-                return done(err) if err
-                loginNewUser (user2) ->
-                  # Redeem once
-                  request.post {uri: courseInstanceRedeemURL, json: {prepaidCode: prepaid.get('code')} }, (err, res) ->
-                    expect(err).toBeNull()
-                    expect(res.statusCode).toBe(200)
-                    # Redeem twice
-                    request.post {uri: courseInstanceRedeemURL, json: {prepaidCode: prepaid.get('code')} }, (err, res) ->
-                      expect(err).toBeNull()
-                      expect(res.statusCode).toBe(200)
-                      done()
--- a/test/server/functional/prepaid.spec.coffee
+++ b/test/server/functional/prepaid.spec.coffee
@ -19,7 +19,6 @@ describe '/db/prepaid', ->
    expect(prepaid.type).toEqual('course')
    expect(prepaid.maxRedeemers).toBeGreaterThan(0)
    expect(prepaid.code).toMatch(/^\w{8}$/)
-    expect(prepaid.properties?.courseIDs?.length).toBeGreaterThan(0)
    done()

  verifySubscriptionPrepaid = (user, prepaid, done) ->
@ -35,6 +34,94 @@ describe '/db/prepaid', ->
      throw err if err
      done()
      
+  describe 'POST /db/prepaid/<id>/redeemers', ->
+
+    it 'adds a given user to the redeemers property', (done) ->
+      loginNewUser (user1) ->
+        prepaid = new Prepaid({
+          maxRedeemers: 1,
+          redeemers: [],
+          creator: user1.get('_id')
+          code: 0
+        })
+        prepaid.save (err, prepaid) ->
+          otherUser = new User()
+          otherUser.save (err, otherUser) ->
+            url = getURL("/db/prepaid/#{prepaid.id}/redeemers")
+            redeemer = { userID: otherUser.id }
+            request.post {uri: url, json: redeemer }, (err, res, body) ->
+              expect(body.redeemers.length).toBe(1)
+              expect(res.statusCode).toBe(200)
+              prepaid = Prepaid.findById body._id, (err, prepaid) ->
+                expect(err).toBeNull()
+                expect(prepaid.get('redeemers').length).toBe(1)
+                User.findById  otherUser.id, (err, user) ->
+                  expect(user.get('coursePrepaidID').equals(prepaid.get('_id'))).toBe(true)
+                  done()
+              
+    it 'does not allow more redeemers than maxRedeemers', (done) ->
+      loginNewUser (user1) ->
+        prepaid = new Prepaid({
+          maxRedeemers: 0,
+          redeemers: [],
+          creator: user1.get('_id')
+          code: 1
+        })
+        prepaid.save (err, prepaid) ->
+          otherUser = new User()
+          otherUser.save (err, otherUser) ->
+            url = getURL("/db/prepaid/#{prepaid.id}/redeemers")
+            redeemer = { userID: otherUser.id }
+            request.post {uri: url, json: redeemer }, (err, res, body) ->
+              expect(res.statusCode).toBe(403)
+              done()
+
+    it 'only allows the owner of the prepaid to add redeemers', (done) ->
+      loginNewUser (user1) ->
+        prepaid = new Prepaid({
+          maxRedeemers: 1000,
+          redeemers: [],
+          creator: user1.get('_id')
+          code: 2
+        })
+        prepaid.save (err, prepaid) ->
+          loginNewUser (user2) ->
+            otherUser = new User()
+            otherUser.save (err, otherUser) ->
+              url = getURL("/db/prepaid/#{prepaid.id}/redeemers")
+              redeemer = { userID: otherUser.id }
+              request.post {uri: url, json: redeemer }, (err, res, body) ->
+                expect(res.statusCode).toBe(403)
+                done()
+            
+    it 'is idempotent across prepaids collection', (done) ->
+      loginNewUser (user1) ->
+        otherUser = new User()
+        otherUser.save (err, otherUser) ->
+          prepaid1 = new Prepaid({
+            redeemers: [{userID: otherUser.get('_id')}],
+            code: 3
+          })
+          prepaid1.save (err, prepaid1) ->
+            prepaid2 = new Prepaid({
+              maxRedeemers: 10,
+              redeemers: [],
+              creator: user1.get('_id')
+              code: 4
+            })
+            prepaid2.save (err, prepaid2) ->
+              url = getURL("/db/prepaid/#{prepaid2.id}/redeemers")
+              redeemer = { userID: otherUser.id }
+              request.post {uri: url, json: redeemer }, (err, res, body) ->
+                expect(res.statusCode).toBe(200)
+                expect(body.redeemers.length).toBe(0)
+                done()
+
+  it 'Clear database', (done) ->
+    clearModels [Course, CourseInstance, Payment, Prepaid, User], (err) ->
+      throw err if err
+      done()
+
  it 'Anonymous creates prepaid code', (done) ->
    createPrepaid 'subscription', 1, 0, (err, res, body) ->
      expect(err).toBeNull()
@ -141,67 +228,35 @@ describe '/db/prepaid', ->
            done() unless found

  describe 'Purchase course', ->
-    it 'Standard user purchases a prepaid for one course, 0 seats', (done) ->
+    it 'Standard user purchases a prepaid for 0 seats', (done) ->
      stripe.tokens.create {
        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
      }, (err, token) ->
        loginNewUser (user1) ->
-          createCourse 700, (err, course) ->
+          purchasePrepaid 'course', {}, 0, token.id, (err, res, prepaid) ->
            expect(err).toBeNull()
-            purchasePrepaid 'course', courseID: course.id, 0, token.id, (err, res, prepaid) ->
-              expect(err).toBeNull()
-              expect(res.statusCode).toBe(422)
-              done()
-    it 'Standard user purchases a prepaid for one course, 1 seat', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 700, (err, course) ->
-            expect(err).toBeNull()
-            purchasePrepaid 'course', courseID: course.id, 1, token.id, (err, res, prepaid) ->
-              expect(err).toBeNull()
-              expect(res.statusCode).toBe(200)
-              verifyCoursePrepaid(user1, prepaid, done)
-    it 'Standard user purchases a prepaid for one course, 3 seats', (done) ->
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user1) ->
-          createCourse 700, (err, course) ->
-            expect(err).toBeNull()
-            purchasePrepaid 'course', courseID: course.id, 3, token.id, (err, res, prepaid) ->
-              expect(err).toBeNull()
-              expect(res.statusCode).toBe(200)
-              verifyCoursePrepaid(user1, prepaid, done)
-    it 'Standard user purchases a prepaid for all courses, 10 seats', (done) ->
-      clearModels [Course, CourseInstance, Payment, Prepaid, User], (err) ->
-        throw err if err
-        stripe.tokens.create {
-          card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-        }, (err, token) ->
-          loginNewUser (user1) ->
-            createCourse 700, (err, course) ->
-              expect(err).toBeNull()
-              createCourse 700, (err, course) ->
-                expect(err).toBeNull()
-                purchasePrepaid 'course', null, 10, token.id, (err, res, prepaid) ->
-                  expect(err).toBeNull()
-                  expect(res.statusCode).toBe(200)
-                  expect(prepaid.properties?.courseIDs?.length).toEqual(2)
-                  verifyCoursePrepaid(user1, prepaid, done)
+            expect(res.statusCode).toBe(422)
+            done()
            
-    it 'Standard user purchases a prepaid course for 3', (done) ->
+    it 'Standard user purchases a prepaid for 1 seat', (done) ->
      stripe.tokens.create {
        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
      }, (err, token) ->
        loginNewUser (user1) ->
-          createCourse 700, (err, course) ->
+          purchasePrepaid 'course', {}, 1, token.id, (err, res, prepaid) ->
            expect(err).toBeNull()
-            purchasePrepaid 'course', courseID: course.id, 3, token.id, (err, res, prepaid) ->
-              expect(err).toBeNull()
-              expect(res.statusCode).toBe(200)
-              done()
+            expect(res.statusCode).toBe(200)
+            verifyCoursePrepaid(user1, prepaid, done)
+
+    it 'Standard user purchases a prepaid for 3 seats', (done) ->
+      stripe.tokens.create {
+        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
+      }, (err, token) ->
+        loginNewUser (user1) ->
+          purchasePrepaid 'course', {}, 3, token.id, (err, res, prepaid) ->
+            expect(err).toBeNull()
+            expect(res.statusCode).toBe(200)
+            verifyCoursePrepaid(user1, prepaid, done)
            
  describe 'Purchase terminal_subscription', ->
    it 'Anonymous submits a prepaid purchase', (done) ->
@ -306,6 +361,7 @@ describe '/db/prepaid', ->
                joeCode = prepaid.code
                expect(prepaid.creator).toBeDefined()
                expect(prepaid.maxRedeemers).toEqual(3)
+                expect(prepaid.exhausted).toBe(false)
                expect(prepaid.properties).toBeDefined()
                expect(prepaid.properties.months).toEqual(3)
                done()
@ -464,47 +520,47 @@ describe '/db/prepaid', ->
          expect(res.statusCode).not.toEqual(200)
          done()

-    it 'Test a bunch of people trying to redeem at once', (done) ->
-      doRedeem = (userX, code, testnum, retry, fnDone) =>
-        loginUser userX, () =>
-          endDate = new moment().add(3, 'months').toISOString().substring(0, 10)
-          subscribeWithPrepaid code, (err, res, result) ->
-            if err
-              return fnDone(err)
-
-            expect(err).toBeNull()
-            expect(result).toBeDefined()
-            if result.stripe
-              expect(result.stripe).toBeDefined()
-              expect(result.stripe.free).toEqual(endDate)
-              expect(result?.purchased?.gems).toEqual(10500)
-              return fnDone(null, {status: "ok", msg: "Redeemed " + retry})
-            else
-              return fnDone(null, {status: 'error', msg: "Redeem attempt Error #{result} (#{userX.id})" + retry })
-
-      redeemPrepaidFn = (code, testnum) =>
-        (fnDone) =>
-          loginNewUser (user1) =>
-            doRedeem(user1, code, testnum, 0, fnDone)
-
-      stripe.tokens.create {
-        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
-      }, (err, token) ->
-        loginNewUser (user) =>
-          codeRedeemers = 50
-          codeMonths = 3
-          redeemers = 51
-          purchasePrepaid 'terminal_subscription', months: codeMonths, codeRedeemers, token.id, (err, res, prepaid) ->
-            expect(err).toBeNull()
-            expect(prepaid).toBeDefined()
-            expect(prepaid.code).toBeDefined()
-            tasks = (redeemPrepaidFn(prepaid.code, i) for i in [0...redeemers])
-            async.parallel tasks, (err, results) =>
-              redeemed = 0
-              error = 0
-              for result in results
-                redeemed += 1 if result.status is 'ok'
-                error += 1 if result.status is 'error'
-              expect(redeemed).toEqual(codeRedeemers)
-              expect(error).toEqual(redeemers - codeRedeemers)
-              done()
+#    it 'Test a bunch of people trying to redeem at once', (done) ->
+#      doRedeem = (userX, code, testnum, retry, fnDone) =>
+#        loginUser userX, () =>
+#          endDate = new moment().add(3, 'months').toISOString().substring(0, 10)
+#          subscribeWithPrepaid code, (err, res, result) ->
+#            if err
+#              return fnDone(err)
+#
+#            expect(err).toBeNull()
+#            expect(result).toBeDefined()
+#            if result.stripe
+#              expect(result.stripe).toBeDefined()
+#              expect(result.stripe.free).toEqual(endDate)
+#              expect(result?.purchased?.gems).toEqual(10500)
+#              return fnDone(null, {status: "ok", msg: "Redeemed " + retry})
+#            else
+#              return fnDone(null, {status: 'error', msg: "Redeem attempt Error #{result} (#{userX.id})" + retry })
+#
+#      redeemPrepaidFn = (code, testnum) =>
+#        (fnDone) =>
+#          loginNewUser (user1) =>
+#            doRedeem(user1, code, testnum, 0, fnDone)
+#
+#      stripe.tokens.create {
+#        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
+#      }, (err, token) ->
+#        loginNewUser (user) =>
+#          codeRedeemers = 50
+#          codeMonths = 3
+#          redeemers = 51
+#          purchasePrepaid 'terminal_subscription', months: codeMonths, codeRedeemers, token.id, (err, res, prepaid) ->
+#            expect(err).toBeNull()
+#            expect(prepaid).toBeDefined()
+#            expect(prepaid.code).toBeDefined()
+#            tasks = (redeemPrepaidFn(prepaid.code, i) for i in [0...redeemers])
+#            async.parallel tasks, (err, results) =>
+#              redeemed = 0
+#              error = 0
+#              for result in results
+#                redeemed += 1 if result.status is 'ok'
+#                error += 1 if result.status is 'error'
+#              expect(redeemed).toEqual(codeRedeemers)
+#              expect(error).toEqual(redeemers - codeRedeemers)
+#              done()
--- a/test/server/init.coffee
+++ b/test/server/init.coffee
@ -0,0 +1,86 @@
+
+module.exports.course = (properties) ->
+  properties ?= {}
+  _.defaults(properties, {
+    name: 'Unnamed course'
+    campaignID: ObjectId("55b29efd1cd6abe8ce07db0d")
+    concepts: ['basic_syntax', 'arguments', 'while_loops', 'strings', 'variables']
+    description: "Learn basic syntax, while loops, and the CodeCombat environment."
+    screenshot: "/images/pages/courses/101_info.png"
+  })
+  
+  return (done) ->
+    test = @
+    course = new Course(properties)
+    course.save (err, course) ->
+      expect(err).toBeNull()
+      test.course = course
+      done()
+
+      
+module.exports.classroom = (givenProperties) ->
+  return (done) ->
+    properties = _.defaults({}, givenProperties, {
+      name: 'Unnamed classroom'
+    })
+    test = @
+    url = getURL('/db/classroom')
+    request.post {uri: url, json: properties}, (err, res, body) ->
+      expect(res.statusCode).toBe(200)
+      Classroom.findById body._id, (err, classroom) ->
+        expect(err).toBeNull()
+        expect(classroom).toBeTruthy()
+        test.classroom = classroom
+        done()
+        
+        
+module.exports.courseInstance = (givenProperties) ->
+  return (done) ->
+    properties = _.defaults({}, givenProperties, {
+      name: 'Unnamed course instance'
+    })
+    test = @
+    url = getURL('/db/course_instance')
+    properties.courseID ?= test.course.id
+    properties.classroomID ?= test.classroom.id
+    request.post {uri: url, json: properties}, (err, res, body) ->
+      expect(res.statusCode).toBe(200)
+      CourseInstance.findById body._id, (err, courseInstance) ->
+        expect(err).toBeNull()
+        expect(courseInstance).toBeTruthy()
+        test.courseInstance = courseInstance
+        done()
+        
+        
+module.exports.user = (givenOptions) ->
+  return (done) ->
+    options = _.defaults({}, givenOptions, {
+      setTo: 'user',
+      properties: {
+        name: 'User'+_.uniqueId()
+      }
+    })
+    test = @
+    user = new User(options.properties)
+    user.save (err, user) ->
+      expect(err).toBeNull()
+      test[options.setTo] = user
+      done()
+      
+      
+module.exports.prepaid = (givenOptions) ->
+  return (done) ->
+    options = _.defaults({}, givenOptions, {
+      setTo: 'prepaid',
+      properties: {
+        type: 'course'
+        maxRedeemers: 10
+        redeemers: []
+      }
+    })
+    test = @
+    prepaid = new Prepaid(options.properties)
+    prepaid.save (err, prepaid) ->
+      expect(err).toBeNull()
+      test[options.setTo] = prepaid
+      done()