What is Khan Academy?
Khan Academy is a nonprofit learning site with thousands of short video lessons and practice exercises. It covers math from arithmetic to calculus, plus physics, chemistry, biology, economics, computer programming, history and test prep.
You can watch every video and read every article without an account. Creating a free account only adds progress tracking, mastery points and teacher assignments, which are optional.
Key features
- Thousands of short video lessons by subject and grade
- Practice exercises with hints and step-by-step solutions
- Courses from early math to college-level topics
- Available in dozens of languages
Pros
- Run by a nonprofit, no ads and no paywall
- Clear explanations that build step by step
- Huge range of subjects in one place
Cons
- Progress tracking needs a free account
- Some advanced topics are covered only briefly
Best for
Ratings and reviews
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Khan Academy FAQ
Is Khan Academy free?
Khan Academy is completely free. It is a nonprofit funded by donations, so there are no paid plans, ads or trials.
Do I need an account to use Khan Academy?
No. Khan Academy works without signing up, so you can open khanacademy.org and start using it right away.
What are some alternatives to Khan Academy?
Similar free tools that also work without an account include Desmos, GeoGebra, Wolfram Alpha, PhET Simulations, Purdue OWL and ZoteroBib.