It is a pretty well known fact that if you give kids one-on-one tutoring from experts, they outperform classroom-educated students by an absurd two standard deviations. The effect size is absolutely mind-boggling, and a damning brand of indictment against the entire modern education system. The problem is that this stuff clearly doesn’t scale, for two reasons; first of all there isn’t enough experts to go around, as it would require a large chunk of the adult population to be experts dedi...