I'm torn about this, I left public schools at 12 and followed a radical form of homeschooling which is extremely similar to this system. I even had friends that were in schools like these. I gained an amazing liberal arts education, much better than most do in highschool. However I am a technical mind at heart, I love reading philosophy now but my degree in mathematics sucked because of so much that I should have learned in highschool I didn't get. This also leads to huge practical problems in getting into college. While letting kids cultivate their own interests is great, I also feel that kids need to be pushed on subjects they might not pursue individually. This is an area I think on a lot and I can't really say that I have completely come to a decision on how I feel about this. If you're interested in the homeschooling portion look up unschooling. Sorry I'm on my phone, that's why I didn't go looking for links. Feel free to ask questions and I can try to give you my perspective.