Learn math (arithmetic, pre-algebra, algebra, geometry, trigonometry, statistics, calculus, differential equations, linear algebra), science (biology, chemistry, physics), economics (microeconomics, macroeconomics, finance, and capital markets), and humanities (art history, civics, finance, US history, US government, and politics) using expert-created videos, interactive exercises, and in-depth papers. You can display videos in full-screen mode and change the replay speed, but there are no options for adjusting the video quality. Videos can be saved to a list inside the app and watched offline. Transcripts accompany the videos to make them easy to understand. Sign up with your Facebook or Google account to keep track of your success and earn badges that will inspire you. You can search the app for interesting videos or watch content about a particular subject. There’s also a section on exam scheduling, a division on college admissions tips, and a part on talks and interviews.

All of the videos are divided into categories, such as biology, finance, the humanities, computing, and so on. You can study algebra, science, and other subjects at your own rate, wherever you like, and for free with the Khan Academy learning app.

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