Khan Academy is a nonprofit providing a free, world-class education for anyone, anywhere. Our interactive practice problems, articles, and videos help students succeed in math, biology, chemistry, physics, history, economics, finance, grammar, and many other topics.
Khan Academy provides teachers with data on how their students are doing so they can identify gaps in learning and provide tailored instruction. We also offer free personalized SAT and LSAT practice in partnership with the College Board and the Law School Admission Council.
Our resources have been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy each month.
Want to extend your learning beyond YouTube? Practice what you've just discovered for free: www.khanacademy.org
Shared 19 hours ago
1.7K views
Shared 2 days ago
2.2K views
Shared 1 week ago
4.9K views
Shared 1 week ago
1.9K views
Shared 1 week ago
1.6K views
Shared 2 weeks ago
6K views
Shared 2 weeks ago
4.7K views
Shared 3 weeks ago
6.8K views
Shared 4 weeks ago
11K views
Shared 1 month ago
5.9K views
Shared 1 month ago
2.9K views
Shared 1 month ago
1.1K views
Shared 1 month ago
1.2K views
Shared 1 month ago
1.2K views
Shared 1 month ago
1.3K views
Shared 1 month ago
1.9K views
Shared 1 month ago
6.4K views
Shared 2 months ago
12K views
Shared 3 months ago
6.8K views
Shared 3 months ago
4.9K views
Shared 3 months ago
3.4K views
Shared 3 months ago
3.6K views
Shared 3 months ago
5.3K views
How to subtract mixed numbers that have unlike denominators | Fractions | Pre-Algebra | Khan Academy
Shared 4 months ago
13K views
Shared 4 months ago
14K views
Shared 4 months ago
9.1K views
Shared 4 months ago
8.9K views
Shared 4 months ago
6.8K views
Shared 4 months ago
4.8K views
Shared 4 months ago
6.8K views
Shared 5 months ago
10K views
Shared 5 months ago
53K views
Shared 5 months ago
7.2K views
Shared 5 months ago
12K views