This app provides many options for the user to create screencasts on the iPad. As my first graders get more familiar with the iPads, I envision switching from Educreations to Explain Everything for creating digital artifacts. However, Educreations has a simpler user interface that is better suited for my first graders at this time.
Check out the video below explaining more about the Explain Everything app. It is very reasonably priced for what you can do with it. By far one of my favorite apps.