Measure thinking, not output. 31 simulations where the performance IS the assessment.
Daily games engineered from cognitive-science research. Retrieval practice, spacing, interleaving, and the generation effect — packaged as play.
Eleven games in the daily rotation. Complete any of them to advance your streak. The Crucible is optional — and harder.
Guess the vocabulary word from a single passage clue. Five tries. Today's puzzle has been solved by 4,821 players.
Play today's puzzle →5 questions, 60 seconds. Don't break it.
One question — beat the community.
20 vocab cards — speed matters.
5 hard questions. Earn a badge.
Today's career — check your fit.
Defeat enemies with recall.
Pure hard-mode. Questions sharpened to a fine edge. Real growth lives here — if you survive it.
Teach to learn deeper.
Surprise rewards await.
Mistakes become insight.
Head-to-head formats, study-group streaks, and weekly tournaments. Invite a friend, a parent, or the whole community.
Head-to-head, fastest wins.
Can your parents beat you?
Team streaks with friends.
8-player single-elimination. 3 rounds. Winner claims the week's crown.
How well do you know yourself?
Two games built directly from peer-reviewed cognitive-science findings. Rigorously tested against our own diagnostic benchmark.
Type your answer first, then choose from the options. Producing beats recognizing — every time.
The most immersive STEM simulation in the portfolio. Seed alien ecosystems, observe collapse, make predictions, and discover why systems survive or fail.
Our free adaptive diagnostic maps your knowledge across any exam in under ten minutes. Your daily game rotation personalizes from the results.
Take the free diagnostic