"Let's move away from traditional models (which work well most of the time) and digitalise it all! Change the world for the better, oh and make "some" money on the way."

It's a bit cynical but there's some truth in it. This is the mistake that a lot of startups made in the last edtech 'revolution' - hopefully with YC releasing this edtech list, it means that we've become more educated about the education field, to come up with better tech solutions.