Study tools
Free, open right away on a phone, and no sign-up. Built for real classes, but they work for anyone learning.
Calc 2 practice
Integration techniques, series, differential equations. Fresh problems, computer-checked answers and worked steps for every miss.
Study Maker
Paste notes or load a reading. Get a study guide, flashcards, a quiz and a match game. Share a set with a class as one link.
Learn by age
Games picked for 3 to 6, 7 to 10, 11 to 14 and 15 and up. First words, chess from the first move, typing and maps.
Polyglot
Your first five words in a minute, plus any word in 49 languages.
Soak
A whole classic book in five short lessons.
Keyflow
Type faster for every essay. A calm typing game.
World Hunt
Hear a language, find it on a real globe.
Chess Path
From your first move to 13,000 real puzzles.
Nothing here needs an account. Progress is saved in your own browser.