Learn it, then prove it

Remember what you study.

Read a short lesson, then answer with 2 choices, then 3, then 4. Topics come back on later days, so what you learn today is still there next month.

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The method

Four steps, every topic

  1. Learn

    A short lesson for each topic, with an example and one idea to remember.

  2. Test yourself

    Answer one question about it, starting with just 2 choices.

  3. Climb

    Each correct answer adds a choice, up to 4. A miss takes one away.

  4. Keep it

    Learned topics come back on later days. Remember them then and they're mastered.

See it in action

How a topic climbs the ladder

A one-minute walkthrough with a sample topic. It doesn't touch any progress.

Step 1 of 6

Learn

Every topic starts with a short lesson and one idea to remember.

Rivers and lakesNext: 2 choices

The Amazon

The Amazon is the longest river in South America. It rises in the Andes of Peru and flows east across Brazil to the Atlantic.

It carries more water than any other river on Earth.

Remember thisThe Amazon: South America's longest river, and the river carrying the most water.
  1. 2 choices (current)
  2. 3 choices
  3. 4 choices
  4. Learned
  5. Mastered
  6. Long-term

Step 1 of 6: Learn. Every topic starts with a short lesson and one idea to remember.

Popular sets

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What you get

Start free. Go further when you're ready.

Free

  • Fully free sets, complete: Spanish for Beginners, AI Basics and AI Advanced
  • About half the topics of every other official set
  • Learn, Review and Test modes with spaced reviews
  • Flashcards and written recall on every topic you can open
Start learning

Learner plan

  • Every topic of every official study set
  • Including the full certification and exam-prep sets
  • New official sets as the library grows
See plans

Creator plan

  • Everything in Learner
  • Build your own study sets, by hand or with AI help
  • Share them privately with the people you invite
  • Submit a set to the Community Library: a moderator reviews it before it's listed
How Create works

Pick a topic. Learn it. Prove it.

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