Spaced repetition is a learnin technique that is usually performed with flashcards. Newly introduced and more difficult flashcards are shown more frequently while older and less difficult flashcards are shown less frequently in order to exploit the psychological spacing effect. The use of spaced repetition has been shown to increase rate of learning.
This repository consists of individual decks that can be imported to Anki. Anki is multiplatform (Web, Androi, iOS, Windows, Linux, Mac) software that works just as flash cards, but much easier to setup!
You can download it on https://apps.ankiweb.net/
Then just download wanted deck from this repo to Anki a start learning!