Here's a good assortment of Educational, on-line videos: www.watchknow.org
Wikipedia co-founder launches online educational-video library
Larry Sanger, who co-founded the Web site Wikipedia, has launched a site that provides free access to a library of educational videos for students ages 3 to 18. The site -- www.watchknow.org -- features links to more than 11,000 videos in 2,000 categories that include history, math, science and other subjects. Sanger described it as "YouTube meets Wikipedia."
Videos connected to kids' books