You'll notice the pages of this wiki (on the left hand side) are the Common Core Standards. We have attempted to align iPad apps with each standard. There will be overlap - one app may meet more than one standard. Please leave comments, suggest apps, or share your experiences in the discussion tab of the appropriate page.
Very easy to understand-- I may go back and check to see what other graphics he has available. It actually applies to PC's too, but the graphics would look just a little different.