The Spaced Repetition System

The Ebbinghaus forgetting curve shows we forget roughly 70% of new information within 24 hours. Spaced repetition counters this by reviewing a word right before it fades, then spacing the next review further out as your confidence grows.

• Correct answer: Word advances to the next box with a longer interval
• Wrong answer: Word returns to Box 1 for more practice
• Result: You spend less time on words you know. More time building the ones you don't.