This has fascinating implications for elementary education. It replicates a lot of what homeschooling shows us about how kids learn. And if you're paying attention, you can hear someone say, again, how teaching methods and learning are currently based on hypothesis rather than fact. In other words, our educational system doesn't know how kids learn and doesn't know the best way to teach. Good to keep in mind if your children are complaining about how much school sucks. Very good to keep in mind if you are a homeschooling parent given to occasional doubt, or fear you kids aren't learning enough. 

Daphne Koller: What We're Learning From Online Education
However, I think its also important to remember that what free online education teaches us about how humans learn, is teaching us how humans learn when they are freely motivated. No one should make the mistake of conflating free motivation with compulsory institutional education.