Interactive learning for every level, from kindergarten to doctorate

How it works

1. Pick a subject

   Browse subjects, units and chapters, filtered to your grade levels.

2. Study the chapter

   Work through short pages with interactive quizzes, charts, boards and audio.

3. Practise and get graded

   Practise as often as you like, then take the graded assessment and see instant feedback.

What you get

• An AI tutor that knows the chapter

  Ask questions in chat while you read. It answers in the context of that lesson, in your language.

• Lessons you can touch

  Interactive quizzes, live charts, simulations and draggable graph boards, inside the lesson itself.

• Practice that marks itself

  Unlimited practice with instant feedback, then a graded assessment when you feel ready.

• A plan you control

  Build a study plan from any chapters, set your own order and pace, and tick off what is done.

• Progress and badges

  Track finished chapters and scores, and earn achievement badges as you go.

• Five languages

  The whole interface, and the AI tutor, work in English, Spanish, French, Vietnamese and Chinese.

Built for every level

Every chapter is tagged with the grades it suits: kindergarten through grade 12, and on to undergraduate, graduate and doctorate level.

Questions

Does it cost anything?

Creating an account and using the lessons is free. Your school or institution manages the content.

Which grades is it for?

From kindergarten through grade 12, and on to undergraduate, graduate and doctorate level. You choose your grades and the app filters to them.

Do I need to install anything?

No. It runs in your browser on a laptop, tablet or phone, and it remembers where you left off.