There are people saying here that is not worth it. I tend to agree but for different reasons. Flashcards with spaced repetition can help you learn mathy concepts, as Michael Niesel and others have shown. As high_derivative notes, to make the process worthwhile, you need to make the notes yourself in order to internalize chunks that are worthwhile to you. That means your own definitions that you are failing to remembe…
In a more recent article Michael Nielsen and his co-author Andy Matuschak have adjusted their thinking somewhat: https://numinous.productions/ttft/ “One of us has previously asserted (Michael Nielsen, Augmenting Long-Term Memory (2018)) that in spaced-repetition memory systems, users need to make their own cards. The reasoning is informal: users often report dissatisfaction and poor results when working with cards ma…
I'd recommend these cards if they were higher quality than the ones I make if the person using the cards already read a textbook on the topics.