NumberShire is an excellent Web based/iOS app game for grades K-2nd learning Math. NumberShire takes place in a fun animated Renaissance-style period where student play through mini games and complete quests to earn rewards and learn different concepts of Math. The class version tracks student data and the game is aligned to Common Core Standards.
I highly recommend checking out NumberShire by clicking here!!!
For a more detailed review check out Edshelf.
For my Pinterest board on Game Based Learning click here.