WatchKnow.org is a site dedicated to organizing educational video clips by subject area. There are currently over 1200 video clips in the science category. Clips include Bill Nye the Science Guy, Schoolhouse Rock, and many more. Very nicely organized site.
Applications for Science Teachers: Find video clips to supplement instruction in Earth/Space, Life Science, and Physical Sciences. There are also clips of “Experiments for Children”- these could be used as examples for science fair projects or demonstrations to increase student engagement in science.