3 ms·
The Leitner system is a good mechanism for spaced repetition: https://en.wikipedia.org/wiki/Leitner_system https://en.wikipedia.org/wiki/Leitner_system
by kamiro 6y ago
The Leitner system is a good mechanism for spaced repetition: https://en.wikipedia.org/wiki/Leitner_system https://en.wikipedia.org/wiki/Leitner_system