Brownie Points is an excellent free iPad app for Math grades K-7th. This app uses an incentive based learning system to help students w/ their basic Math skills in areas such as: addition, multiplication, algebra, geometry, etc. When a student finishes their lessons they earn "brownie points" that allows to unlock and play pre approved apps/games. Best of all Brownie Points tracks all students progress and is aligned to Common Core Standards.
I highly recommend checking out Brownie Points by clicking here!!!
Below is a brief demo video...
Introduction to Brownie Points from Brownie Points on Vimeo.
For my Pinterest board on Educational iOS Apps click here.