Lots of really useful apps for the classroom. I especially like the common core app.
My favorite FREE app for making 10! I'm calling it a must have for first grade common core math! Make 10+ (and the kids LOVE it!)
I had no idea this existed - what a great data tracker! Can be used with common core or any other standards; teachers can upload and share common assessments, and there's now an Edmodo app for seamless integration.