for spaced repetition. In this system, your flashcards progress through a series of buckets, with the following rules:
All cards start in bucket 1.
When you recall a card successfully, it moves to the next bucket.
When you fail to recall a card, it goes back to bucket 1.
Importantly, the farther along a card gets, the less frequently it's surfaced for review. We've populated this study guide with a reasonable study interval for each bucket, but you can adjust them by adjusting the durations below.