1100+ free videos on math and other subjects made with a crayon

This is called Khan Academy. I originally found out about this from an article in the SF Chronicle.

Here is a sentence from his vision document

The goal of the Khan Academy (http://www.khanacademy.org or http://youtube.com/khanacademy ) is to use technology to provide a free, world-class education to anyone, anywhere. It is currently a library of 1176 videos on YouTube (and mirrored elsewhere) covering everything from basic arithmetic to advanced calculus, chemistry, economics and biology.

This is interesting on several levels, for example:

• there are several paid offerings on the web for this same material
  
• this is done only with a paint program (i.e. no fancy graphics)
  
• there are also sessions on current economic issues (e.g. Bernanke TARP)
  
• he never shows his face on the videos
  
• some have poor sound..he notes this and apparently never goes back to fix it
  
• there is a charge on YouTube to download the video ($0.99)
  
• supposedly Google pays him some money since he gets so many views
  

Finally, it is interesting that all of this material could just as easily come from (many) books in the public library.