I was skimming reddit and someone named Yakari posted in response to “what are your best studying techniques?” They described a studying method where they overlay strips of paper vertically on top of their notes as they study them, periodically adding more strips to obscure more and more of the notes.

I haven’t tried it but it seems pretty genius — I expect it would be effective and easy
to implement, and I hadn’t heard of it before so figured you folks might not have either.

https://www.reddit.com/r/AskReddit/comments/9lskg2/serious_straight_a_students_of_reddit_what_is/e799ia2/