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View Khan Academy's library of over 4,000 educational videos.

Viewer for Khan Academy makes it easy to view Khan Academy's library of over 4,000 educational videos.

Topics covered include: general science, biology, chemistry, physics, math, finance, history, the humanities, and more.

Khan Academy's library of videos is available free of charge. Teachers, students, scientists - people form all walks of life - will find Khan Academy's materials immensely valuable and engaging.

You can take individual videos, or entire topics offline to watch when you don't have a network connection. Follow along, skip ahead, or go back by navigating subtitles, and connect with your Khan Academy user account to track your work and earn achievements.

If you'd like to learn more about Khan Academy, please visit khanacademy.org.

Viewer for Khan Academy was developed by Concentric Sky, a leading mobile education software developer. Concentric Sky also developed the official Encyclopaedia Britannica app and the Britannica Kids series, for iPad and iPhone, and National Geographic’s GeoBee app for iPad, iPhone and Android.

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