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If you're looking for a great math app, look no further. Screenchomp is a great free app that lets you and your students create and share their own Khan Academy-style tutorials. You can have students create help videos for each other, send your own help videos to students even on the weekends, or use it as a powerful formative assessment tool. This pack comes with two helpful worksheets to help you start organizing students into math video groups, and a video tutorial that will walk you through the basics of the app.