Read the question, try to recall the answer, then press Show Answer (Space).
Grade yourself: Missed it, Not sure, or Got it (1, 2, 3).
Each question has a familiarity score from your past grades. Recent grades count more.
Reorder the queue, or filter by subject, label, or search.
Back up and sync (optional)
Progress is stored in this browser only. Save your ratings to a file to keep or move them, or connect a GitHub Gist of your own to sync across devices.