Science

• http://phet.colorado.edu
  Interactive physics simulations
  
  
• http://www.pbs.org/science
  PBS Science and Nature site
  
  
• http://www.pbs.org/wgbh/nova/sciencenow
  Covers timely developments and intriguing personalities in the world of science and technology
  
  
• http://jchemed.chem.wisc.edu/JCESoft/CCA/pirelli/index.html
  Chemistry Comes Alive – video collection from the Journal of Chemical Education
  
  
• http://starchild.gsfc.nasa.gov/docs/StarChild
  Astronomy website
  
  
• http://www.tryscience.org
  Science experiments, field trips and adventures
  
  
• http://www.nyelabs.com
  Bill Nye "The Science Guy" website