Cost: $0.99 2nd Grade, 3rd Grade, 4th Grade, 5th Grade
This math app allows you to choose not only the operation, but also the number that will be used for drill. If you choose addition by 4s, then only the 4s facts will appear. As you choose the correct answer the frog will hop across the lily pad. Levels continue until too many incorrect answers make the frog fall off the lily pad.