diff --git a/app/templates/admin/analytics.jade b/app/templates/admin/analytics.jade
index f00cdf5b4..24aa6da86 100644
--- a/app/templates/admin/analytics.jade
+++ b/app/templates/admin/analytics.jade
@@ -28,6 +28,11 @@ block content
 
     h3 Active Classes 90 days
     .small Active class: 12+ students in a classroom, with 6+ who played in last 30 days.
+    .small Paid student: user.coursePrepaidID set and prepaid.properties.trialRequestID NOT set
+    .small Trial student: user.coursePrepaidID set and prepaid.properties.trialRequestID set
+    .small Paid class: at least one paid student in the classroom
+    .small Trial class: not paid, at least one trial student in classroom
+    .small Free class: not paid, not trial
     .active-classes-chart.line-chart-container
 
     h3 Recurring Revenue 90 days
diff --git a/scripts/analytics/mongodb/queries/insertAnalyticsActiveClasses.js b/scripts/analytics/mongodb/queries/insertAnalyticsActiveClasses.js
index 75a857cf3..b1a5401cd 100644
--- a/scripts/analytics/mongodb/queries/insertAnalyticsActiveClasses.js
+++ b/scripts/analytics/mongodb/queries/insertAnalyticsActiveClasses.js
@@ -58,7 +58,7 @@ function getActiveClassCounts(startDay) {
 
   // Classrooms
   // paid: at least one paid member
-  // free trial: not paid, at least one trial member
+  // trial: not paid, at least one trial member
   // free: not paid, not free trial
   // user.coursePrepaidID set means access to paid courses
   // prepaid.properties.trialRequestID means access was via trial