Of all the apps out there that can be used to create tutorials or explanations, I have found that Doceri is my favorite. There are a lot out there like Screen Chomp, Edmodo, Explain Everything, and more, but Doceri is my favorite free app because you can save creations to the camera roll. Since we did a lot of posting on Kidblog, this was especially important to us.
I created a few different Doceri Centers for math to let my students show me different skills. They are differentiated, so be sure to check that out if you download the centers below.
Here is an example of a video one of my students created:
Here are the free Doceri Centers. Enjoy!
Place Value Center
Number Line Center