So much to love about Montessori but no other developer does it as well as these guys. Intuitive, thorough and an easy, beautiful format. So many ways for my 6 year old to practice adding and subtracting large numbers! The reward system doesn't out do the learning games so it's not a distraction which is a plus in my book. Having an opportunity to practice with manipulatives really solidifies any new concepts that come with adding and subtracting large numbers.

Nice maths

This app looks great but just didn't seem to work reliably- I couldn't complete the problems. Very frustrating. Tested on iPhone 5.