As a former high school math teacher, this is my favorite math app for my own children (ages 8 and 11). Honestly, there are a lot of secondary students who could benefit from it. I absolutely LOVE it! I was a bit put off by the high price of the extra levels ($4.99), but decided it was worth it for such a great visual understanding of place value. The graphics are super cute and engagine and the interface is intuitive. I also like that I can have separate players. That way I can play through to higher levels without having my kids miss out on the lower ones. :)
Metamorphosis12 about Motion Math: Zoom