I agree on your critique of the growth mindset. It's hard to teach. I meant more that we're looking at small differences in innate ability and deciding that we've accomplished as much as we can.

I strongly disagree with that. We do not have a research-and outcome-backed educational system. Teachers wildly vary in quality and approach and get very little feedback in order to improve.

I firmly believe a person born of average intellect should be able to master calculus. Most don't.

From Patrick Collison's Questions:

> Is Bloom's "Two Sigma" phenomenon real? If so, what do we do about it?

> Educational psychologist Benjamin Bloom found that one-on-one tutoring using mastery learning led to a two sigma(!) improvement in student performance. The results were replicated. He asks in his paper that identified the "2 Sigma Problem": how do we achieve these results in conditions more practical (i.e., more scalable) than one-to-one tutoring?