Sadly this was about six years ago. The code and the platform it was built on are long gone. I don't know of anyone else who is doing exactly the same thing, th

Sadly this was about six years ago. The code and the platform it was built on are long gone. I don't know of anyone else who is doing exactly the same thing, though Allset Learning in Shanghai (run by a friend and fellow ex-employee of the company I built this thing at) is making graded readers built around similar ideas. Not really the same as an adaptive system, though.