Salman Khan, founder of the academy, is not only expanding his reach into the non-English speaking world. He also makes his greatly popular education videos accessible to people who are Deaf or hearing impaired. His global initiative is supported by Universal Subtitles, an NGO focusing on web accessibility through captioning.
Universal Subtitles is based on the concept of crowd-sourcing captions. Any person can caption a video that is integrated with Universal Subtitles using a user-friendly captioning editor. Captions can be peer-reviewed and re-edited, if necessary. The concept is very similar to Wikipedia where users contribute, edit and update content.
On the Khan Academy website, you can select English captions or subtitles in different languages via a menu that is available on each video. Some videos already offer a wide variety of languages; some have not been captioned as yet.
Universal Subtitles was launched by Participatory Culture Foundation last year and has already empowered more than 100,000 video transcriptions.
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