Mastery Arcade is a growing arcade of learning games, powered by real learning science. One pass unlocks every world — and behind the fun, the same proven engine makes what you learn last.
No sign-up · Takes about a minute
Pick a game. Play a few rounds. Behind the fun, one engine is doing the real work — you just play.
Jump into a game built around the facts you want to own. It feels like an arcade, not a worksheet — so you actually come back tomorrow.
Quietly, one engine schedules each fact for the moment you're about to forget it, times your recall for speed, and corrects you the instant you slip.
Recall gets faster and more automatic every session — until you stop calculating and just know it, cold. Months later, not days.
Drilling math facts should feel like saving the world — so we built it that way. Original scores that swell when the villain appears. Neon worlds in real WebGL. A 3·2·1 countdown, a draining life bar, a clock that turns red. The learning science does the heavy lifting underneath — you just feel like a hero.
Twenty problems. A red pen. Done at the bell — and forgotten by dinner.
Suit up, pick your character, and beat the Times Machine before it resets the timeline. 3… 2… 1… go.
Every game has stakes, a story, and a villain to beat — not a progress bar.
Original soundtracks that swell when the boss appears and duck the instant you answer.
Hand-tuned neon, custom characters, and WebGL celebrations built from scratch.
A per-question clock that turns red, a boss life bar that only drops when you're fast and right, and a hard 100% gate to win.
The most fun you'll ever have memorizing something — your brain won't even notice it's working.
Learning it for the first time, or finally nailing what you faked in school — Mastery Arcade meets you where you are.
Build the foundation the fun way — and actually look forward to practice.
The recall speed that wins timed tests, the SAT, and the ACT.
Refresh what slipped away — or finally master what you never learned cold.
Watch them get it, and see exactly what's mastered and what's next.
A growing arcade of learning games, each built on the same proven engine. Times Machine is live now, Worldsong is on the way, and more are in the works — one pass opens all of them.
Times Machine turns times tables, squares, and cubes into a 17-level neon campaign. Every fact you answer lands a hit; every boss is a checkpoint that won't let you pass until you're fast and flawless. It's live now — the flagship of the arcade.
Explore Times Machine →
Learn the countries of the world
Worldsong is a sweeping musical journey through world geography — every country's place on the globe, its shape, its capital, its flag, sung into memory. Same proven engine, a whole new world.
The fun is the disguise. Under every Mastery Arcade game runs one engine — decades of cognitive science, working the whole time. Here's exactly what it's doing while you play.
Memory has a forgetting curve — a fact that's crystal-clear this morning is hazy by next week. Re-encountering it right before you'd forget — at the inflection point of the curve — is when re-learning locks in. FSRS models each fact's difficulty, stability, and retrievability and predicts that moment, per fact, per learner.
The algorithm Anki refined over 30 years · scheduled per factTwo people who both get 7 × 8 right look identical on a worksheet. But one answered in 0.6 seconds and the other in five — the slow one is calculating, the fast one is recognizing. Speed of recall predicts long-term math success, so we time every answer against one threshold — about four seconds — whether you're seven or forty. What changes with the learner is which facts come up next.
Hundreds of CBM-M fluency studiesPassive correction — “the answer was 42” — barely sticks. So on every miss, the answer flashes, vanishes, and you retype it from memory. That's Cover-Copy-Compare, and it fires automatically. Pulling the answer back out beats re-reading it by a wide margin.
40–60% better retention than passive correctionEvery fact climbs a ladder — needs work, getting there, almost, mastered — and only true, fast mastery counts. The boss fight is a hard gate: you win only by answering every fact correctly and fast. No shortcuts, so what you unlock, you own.
17 levels · tables to 15, squares & cubes to 20Spaced repetition, timed retrieval, and Cover-Copy-Compare, together —
Working memory only holds a few things at once. When you have to stop and grind 14 × 13 in the middle of an algebra problem, the real thinking stalls. Automaticity clears the jam — recall becomes instant and effortless, freeing 100% of your mental energy for the actual math. Knowing the squares and cubes cold is a quiet superpower on the SAT & ACT.
Cognitive Load Theory · Sweller, 1988Built on the research: Skinner et al. (1989), Cover-Copy-Compare · Shinn, Curriculum-Based Measurement · Roediger & Karpicke, the testing effect · FSRS / SM-2 spaced repetition.
AI is the most powerful tool we've ever built — and the people who get the most from it are the ones who can still think without it. The basics aren't busywork; they're what frees your mind to do the interesting part. Sharp fundamentals keep you fast, capable, and in the driver's seat.
This isn't nostalgia — it's how you stay a capable human. Mastery Arcade is the gym for it.
My 8-year-old asks to do his times tables now. I genuinely didn't think that sentence was possible.
Jess R.Parent of twoI run it for the last five minutes of class and the whole room is locked in. Their recall speed jumped in a month.
Mr. Alvarez5th-grade teacherI'm 34 and finally know my squares cold — the stuff I faked in high school, I actually have now.
Devin P.Adult learner7 × 8 in 0.6sBeating my own time on the leaderboard is weirdly addictive. Now 7 × 8 is just there — no thinking.
Maya T.7th grader1 game today (Times Machine). Every future game included at your price. Price steps up when the next game ships.
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Whatever you forgot — or never quite learned — a few minutes a day is all it takes. Pick a game, and watch it turn automatic.
