Recently, we have had multiple reports of errors with the Screencastify app for Chromebooks. As a result, we have removed Screencastify from student Chromebook profiles and replaced it with Nimbus. Nimbus allows students to record screencasts with or without the web camera window. Nimbus also allows you to capture and annotate screenshots.
For more information about Nimbus, please see the blog post from earlier this year reviewing Nimbus.
As a reminder, we do not push apps for teacher profiles so if you would like apps available, you need to install them from the Chrome web store.
Thanks!