WordAhead is a free vocabulary video site that shows you videos to help you understand the meaning of a word instead of reading a definition.
These videos are made by users and uploaded to WordsAhead. They are then voted and the popular ones get to the Study Room. You can find all the other videos in the Video section.
Good concept, lots of new words added constantly. At this rate we could probably plug our kids into a comp and they would get a degree hehe. Always hated book anyways, should have had this as a kid.