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Created by experts, Khan Academy’s library of trusted, standards-aligned practice and lessons covers math K-12 through early college, grammar, science, history, AP®, SAT®, and more. It’s all free for learners and teachers.
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Khan Academy's Mathematics 1 course is built to deliver a comprehensive, illuminating, engaging, and Common Core aligned experience!
Learn about all the sciences, from physics, chemistry and biology, to cosmology and astronomy, across hundreds of videos, articles and practice questions.
Already have an account? Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.
Khan Academy breaks down tough concepts in an easy manner and helps you understand subjects better without having to memorise them. Learn anything you want, at your own pace. 100% Free.
Chemistry archive. The chemistry archive contains legacy chemistry content, and is not being updated with new content. Exercises and mastery mechanics will soon be removed from the chemistry archive. For our most up-to-date, mastery-enabled courses, check out High School Chemistry and AP Chemistry!
