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Pick a deck, start remembering
Every deck here is real: SuperGuide read a real page and pulled out the facts worth keeping. Play one and feel the difference between having read something and knowing it. No account, no instructions, just questions.
Being asked is what makes a fact stick. In the app, FSRS spaced repetition asks each one again the day before you would lose it. This page forgets the deck when you leave; your brain will not, for a while.
Language · Dutch
Dutch kitchen vocabulary that actually sticks
Learn the essential Dutch kitchen words, from het mes to de koelkast, by playing them as a quiz. Free, no sign-up, and spaced repetition makes them stick.
Science · Sleep
How much sleep you need, by age
How much sleep you need at every age, why teenagers cannot wake up, and what a 90-minute sleep cycle is. Play the facts and remember them for good.
Science · Marine life
Octopus facts your brain refuses to forget
Why octopuses have three hearts, blue blood and thinking arms. The best octopus facts as a playable quiz you will actually remember.
Science · Biology
Photosynthesis, explained so it sticks
How photosynthesis works, minus the textbook fog: chlorophyll, light reactions, the Calvin cycle. Play the facts as a quiz and actually remember them.
History · 20th century
The Space Race: the dates worth keeping
Sputnik to Apollo 11: the Space Race's key dates and firsts as a playable quiz. Learn who did what first, and remember it with spaced repetition.
Want a deck on something else? Paste your own text into the free demoand make one in three seconds.