http://en.wikipedia.org/wiki/Montessori_education Now there is a lot of discussions on how this approach can be translated to touch devices because moving things in the real world is something important in the approach. But most of Montessori people thinks that it is just another tool that can be useful (I think that too - it is just another tool) and there are certified Montessori teachers (I'm not) that are doing apps, and a lot of teachers told me that they love my apps