Do not hide teacher note for small screens, add close link

app/styles/home.sass

@@ -126,11 +126,13 @@
     top: 400px
     width: 380px
     z-index: 1
+    
+    .glyphicon-remove:hover
+      text-decoration: none
+      
     .btn
       margin: 10px 0
     
-    @media screen and ( max-width: 1000px )
-      display: none
     
     @media screen and ( max-height: 800px )
       top: 200px

app/templates/home-view.jade

@@ -42,6 +42,7 @@ block outer_content
   if view.withTeacherNote
     .style-flat
       .bg-navy
+        a#close-teacher-note-link.glyphicon.glyphicon-remove.pull-right
         h3 Teachers!
         h4 Want the most engaging way to teach programming at your school?
         .text-center

app/views/HomeView.coffee

@@ -7,6 +7,7 @@ module.exports = class HomeView extends RootView
 
   events:
     'click #play-button': 'onClickPlayButton'
+    'click #close-teacher-note-link': 'onClickCloseTeacherNoteLink'
 
   constructor: (options={}) ->
     super()
@@ -56,3 +57,6 @@ module.exports = class HomeView extends RootView
 
   isNewPlayer: ->
     not me.get('stats')?.gamesCompleted and not me.get('heroConfig')
+
+  onClickCloseTeacherNoteLink: ->
+    @$('.style-flat').addClass('hide')