diff --git a/views/directive/editor.jade b/views/directive/editor.jade
index 57a743a81..9e8b974e8 100644
--- a/views/directive/editor.jade
+++ b/views/directive/editor.jade
@@ -70,7 +70,8 @@ div(ng-show='tab === "code"')
                 href='#',
                 ng-click='toggleFullScreen()',
                 title='Toggle fullscreen',
-                ng-class='{ active: fullScreen }'
+                ng-class='{ active: fullScreen }',
+                ng-hide='challengeId'
                 )
                 .full-screen-control
                     .round
@@ -83,4 +84,4 @@ div(ng-show='tab === "code"')
             span Download teacher's guide
 
     h4(ng-if='guide') Guide
-    .guide(ng-bind-html="guide | markdown", ng-if='guide')
\ No newline at end of file
+    .guide(ng-bind-html="guide | markdown", ng-if='guide')