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A thousand lessons, four languages, and sims that make it real

Over 1,000 lessons across languages, AP exams, and K-12, with interactive sims that let you see how a concept works.

Every course and lesson is free on every plan. Depth and AI features are what the paid plans add.

Spanish, French, Latin, and Mandarin from A1 to B2, with conversation practice built in.

SAT and ACT diagnostics map your score to skills, so your practice hits what costs you points.

Take a concept apart in the Lab and watch it respond, instead of just reading about it.

Build vocabulary with etymology and context, then let spaced repetition keep it fresh.

Lessons connect to your decks and your Assistant, so review and help are always one step away.

The rest of the platform

Slate is free to start, with no credit card. Set up your first deck, lesson, or study block in a couple of minutes.