Larry Sanger, co-founder of Wikipedia, has launched a new web site designed to gather and organise educational videos for students ages 3 to 18. The site, WatchKnow.org, currently features more than 11,000 videos across 2,000 categories on subjects such as math, science, and history. The nonprofit site features new software, developed specifically for the site by Sanger, that allows wiki-style collaboration among users. eSchool News, 18 November 2009