Here's an updated version of my previous video, requested by HackingChinese. It contains the explanation in the video itself, rather than shoving it all in the video description.
For those interested in using a SRS for review, I highly recommend using Anki:
It is open source, and contains a lot of custom decks and plugins made by other users that you can use. Most importantly, it is multi-platform, meaning you can even use it on your phone, and have your study data sync between all machines you have Anki installed on. Get this installed on your phone, and you can study while you do mundane things like ride on a bus, or sit on the toilet. Good times.
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Spaced repetition is a learning technique that incorporates increasing intervals of time between...