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 …

Learn about all the sciences, from physics, chemistry and biology, to cosmology and astronomy, across hundreds of videos, articles and practice questions.

Learn how to program drawings, animations, and games using JavaScript and the Processing library, and explore the technologies behind the web as you design webpages with HTML and CSS.

Learn fifth grade math—arithmetic with fractions and decimals, volume, unit conversion, graphing points, and more. This course is aligned with Common Core standards.

Learn how to code computer programs, how to design algorithms that make computers more efficient, and discover what a career in computing could look like.

Learn how to use SQL to store, query, and manipulate data. SQL is a special-purpose programming language designed for managing data in a relational database, used by thousands of apps and …

Explore comprehensive Algebra 1 lessons, interactive exercises, and videos to master algebra concepts and enhance problem-solving skills on Khan Academy.

Grammar is the collection of rules and conventions of a language. Whether you're learning English for the first time or just looking to improve your speaking and writing skills, this course is your …

Regardless of who you are, mastering even just one more skill on Khan Academy results in learning gains.

Learn differential calculus—limits, continuity, derivatives, and derivative applications.