Years ago I wrote a series of educational iOS apps for kids: http://www.tommyteaches.com/ http://www.tommyteaches.com/ After a few years of Apple --for no goo

Years ago I wrote a series of educational iOS apps for kids: http://www.tommyteaches.com/ http://www.tommyteaches.com/ After a few years of Apple --for no good reason at all-- forcing code rewrites and maintenance I could no longer justify keeping these apps on the App Store, so they are now gone. Anyhow, the Tommy Teaches apps used a combination of spaced repetition, genetic solvers and other software witchcraft to improve the rate of learning. I mostly developed these out of personal need, when one of my kids was having trouble with a few letters of the alphabet (I forget how old he was, very young obviously). I downloaded a few apps to try and solve the problem only to discover they really didn't know how to teach a kid anything. The simple example being that they would keep repeating letters he had absolutely no problems with and gave the trouble letters equal treatment. Tommy Teaches worked extremely well. Our local schools asked me to develop a version for Special Needs kids, something I started to do but ultimately could not complete due to Apple making it impossible to make money to fund such development (which, I learned, is very expensive). Just a quick note/anecdote to say spaced repetition, perhaps along with other techniques can work very well if applied to a domain that might benefit from the approach.