The Two-Sigma Problem

Last week on the podcast, we talked about direct instruction and blooms to Sigma problem. This idea that this psychologist, the Christian psychologist bloomed was trying to find good ways of improving education. He found that the best thing that you could do is tutoring, one-to-one individualized tutoring. It's a big effect problem because in education research, if you look at randomized controlled trials,. most of them, are cos0.