Review Queue
Reading a concept once and getting it right once is not the same as knowing it. Memory fades on a predictable curve — unless you retrieve the fact again just as you’re about to forget it. That’s spaced repetition, the most evidence-backed study technique there is, and this page runs it for you automatically.
Whenever you miss a quiz question anywhere on the site, that concept lands here. It comes back tomorrow, then in 3 days, a week, 3 weeks, 2 months — each correct recall pushing it further out, each miss pulling it back. Do a little every day and the whole course moves into long-term memory.
Everything here lives in your browser (localStorage) — no account, no sync, no tracking. Clearing site data resets it. The schedule is a 5-box Leitner system: a correct recall promotes a card to the next interval; a miss sends it back to the start. Two minutes of review a day beats an hour of cramming once a week.
Nothing in the queue yet? Go answer some quizzes — the pattern drill, the diagnostic, or any chapter’s checks. Getting things wrong is how the queue fills, and the queue is how you stop getting them wrong.