Khan Academy
We have already wrote about Khan Academy on FrostClick before, highlighting their amazing educational resources and videos ready to get you on the target, and now there is even more. So for all the Know-It-All fans here is the official Khan app for the iPad, one of the best educational offering till date to hit the iOS scene.
Developed by the Khan Academy team, timely volunteers and part-time contributors, the app is a class apart and surely does what only can leave the users imagination in awe.