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Khan academy

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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.
https://www.khanacademy.org/login
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Math
Early math review Learn early elementary math—counting, shapes, basic addition and subtraction, and more.
https://www.khanacademy.org/math
SAT Prep
Students will continue to be able to use Khan Academy's Official Digital SAT Prep courses, developed in partnership with College Board. However, our legacy Official SAT Practice experience - which supported students in preparing for the paper-and-pencil...
https://support.khanacademy.org/hc/en-us/articles/17921365165581-Moving-from-Official-SAT-Practice-to-Official-Digital-SAT-Prep-on-Khan-Academy
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Join Khan Academy and access thousands of free courses on math, science, art, programming, and more. Khan Academy is a nonprofit that aims to provide a world-class education for anyone, anywhere. Sign up today and start learning at your own pace.
https://www.khanacademy.org/signup
Entrar
Aprenda Matemática, Artes, Programação de Computadores, Economia, Física, Química, Biologia, Medicina, Finanças, História e muito mais, gratuitamente. A Khan Academy é uma organização sem fins lucrativos com a missão de oferecer ensino de qualidade...
https://pt.khanacademy.org/login
Science
Electromagnetic waves and interference. Geometric optics. Special relativity. Quantum Physics. Discoveries and projects. Review for AP Physics 1 exam. Cosmology and astronomy. Learn about all the sciences, from physics, chemistry and biology, to...
https://www.khanacademy.org/science
About | Khan Academy
A personalized learning resource for all ages. Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science,...
https://www.khanacademy.org/about
Khan Academy
Khan Academy is like a friend who will help you learn anything, any time. I used to fear mathematics, but then I fell in love with it because of Khan Academy. We are a not for profit organisation on a mission to provide world-class education for anyone,...
https://learn.khanacademy.org/learn-anything/
Home - SAT Suite of Assessments | College Board
SAT Practice on Khan Academy® is free, comprehensive, and available to all students. With personalized plans, practice tests and more, Khan Academy is good preparation for any test in the SAT Suite.
https://satsuite.collegeboard.org/
Using the Site - Khan Academy Help Center
How can I find courses that aren't listed in the Course menu?
https://support.khanacademy.org/hc/en-us/sections/200497120-Using-the-Site
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