“What that extra time does is allow for a more relaxed atmosphere,” [Frank] Corcoran said, after the class was over. “I find that the problem with math education is the sink-or-swim approach. Everything is rapid fire, and the kids who get it first are the ones who are rewarded. So there comes to be a feeling that there are people who can do math and there are people who aren’t math people. I think that extended amount of time gives you the chance as a teacher to explain things, and more time for the kids to sit and digest everything that’s going on–to review, to do things at a much slower pace. It seems counterintuitive but we do things at a slower pace and as a result we get through a lot more. There’s a lot more retention, better understanding of the material. It lets me be a little bit more relaxed. We have time to have games. Kids can ask any questions they want, and if I’m explaining something, I don’t feel pressed for time. I can go back over material and not feel time pressure.” The extra time gave Corcoran the chance to make mathematics meaningful: to let his students see the clear relationship between effort and reward.
–– Frank Corcoran quoted in Outliers by Malcolm Gladwell p 262