Spend an afternoon brushing up on statistics. Discover how the Krebs cycle works. Learn about the fundamentals of music notation. Or, if you’re feeling particularly adventurous, learn how fire-stick farming changed the landscape of Australia. It doesn't matter if you are a student, teacher, homeschooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get a leg up in earthly biology—Khan Academy's materials and resources are available to you completely free of charge.
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Quizzes and unit tests are here! Save time as you prep for a test or catch up in class. When you take a quiz or unit test, you'll get personalized recommendations on what to study next. Quizzes and unit tests are currently available in math and science, and we'll be adding them for more topics soon!
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(For our Indian learners, we have aligned math and science content on our app to NCERT/CBSE curriculum. Study more effectively for your 6-to-12-grade math classes with our quizzes and unit tests. After each assessment, you’ll get personalized recommendations on exercises to focus on, related videos, and step-by-step hints. You’ll also build a strong foundation for your boards, CAT, GMAT, IIT-JEE, and other exams.)
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