It's great for math, for example. It's spacing + testing effect: https://en.wikipedia.org/wiki/Testing_effect https://en.wikipedia.org/wiki/Testing_effect Sup

It's great for math, for example. It's spacing + testing effect: https://en.wikipedia.org/wiki/Testing_effect https://en.wikipedia.org/wiki/Testing_effect Suppose you can solve some problem or prove some theorem today. Then you try to do it again next week, next month and so on. It's very different from rote memorization.