Spaced Recall
A miniature spaced-repetition engine that shows why retrieving information beats re-reading it — and why spacing the retrievals matters more than total study time.
How to run it
- 1.Read a term, try to answer from memory, then reveal it.
- 2.Mark whether you recalled it; misses come back sooner, hits are pushed further out.
- 3.Come back later — your queue and streak persist in your own browser.
Interactive demonstration
Box 1 of 5 — interval 1 day
Neuroplasticity
Try to answer from memory, then reveal.
How this demonstration works
A small local scheduler tracks a box level per item, in the tradition of the Leitner system. Correct recalls promote an item to a longer interval, misses reset it. State lives only in localStorage on your device and can be reset with one button.
What the science says
Retrieval practice — actively producing an answer — reliably outperforms re-reading for durable retention, and distributing practice across time outperforms massing it into one session. The effect holds across ages and materials, which is why spacing and testing are among the best-supported findings in learning science.
Sources
Sponsor this work
BRAINMATTER is independent and reader-supported. These demos and the Visualizer Studio run entirely in your browser, with no tracking and no sign-up. A one-time sponsorship covers research time, editorial review, and hosting so we can keep publishing without paywalls.