Images Of Change (Free): Natural disasters, a warming climate, and human activities are rapidly altering the face of our planet. NASA’s Images of Change app lets you take a close-up view of many of these changes in an exciting and hands-on format.
Hopscotch is a coding app for older children (upper elementary and older) that teaches iPad coding language. One of their taglines is "Anybody can code." This app is proof of that! Available FREE from iTunes.