> I didn’t hear of spaced repetition in school, but isn’t flash cards essentially the same thing? The key part of spaced repetition is the exponential backoff

> I didn’t hear of spaced repetition in school, but isn’t flash cards essentially the same thing? The key part of spaced repetition is the exponential backoff for correctly-remembered items: An extended time between reviews appears to strengthen your memory much more than a short time, and an exponential schedule will let you add a constant number of items per day without the review load growing uncontrollably. If you want to do this with physical flash cards, you can use something like a Leitner box: https://en.wikipedia.org/wiki/Leitner_system https://en.wikipedia.org/wiki/Leitner_system