New: The free coding aptitude test is here. No account needed.

Ask Codey. He's seen this bug before.

Codey the Sr. Developer is the mentor behind the whole platform: access the programming glossary, decks you can drill as flash cards or a memory game, and review the cheat sheets from the classroom. Codey will guide you through your development journey. Ask him anything from any page.
Free account, no sales call. Every paid feature has a sample you can try.
Learn it by playing it
Three games, all drawn from the glossary, so what you play is what the decks teach. Every one has a free way to play.
Memory

Turn tiles to pair each term with its meaning, in as few turns as you can.
Every level free to play
TermStack

Guess the glossary term, a letter at a time. Green, yellow and red tell you how close you are.
Every length free to play
CodeWord

Crossword puzzles where every answer is a term and every clue is its definition.
Every puzzle free to play
Straight from the classroom
These cheat sheets are your visual guide to learning. Every cheat sheet, at every level, is FREE to read.
Three ways to work a deck
Every deck is free to play, at every level, no account needed. A free account keeps track for you: your daily streak, your game stats, and your level in each subject.
Flash cards
Term on the front, definition and a snippet on the back. Grade yourself and Codey keeps the misses.
Memory match
Terms and meanings face down. Pick the categories, levels and how many pairs, then match them in as few turns as you can.
Glossary
Every definition in one list. Reading is open to anyone; searching needs a free account.