"Recently passing the 1 billion user mark, Google has come a long way since it was first founded back in 1998 and has become a byword for internet searches. But, beyond chucking a couple of words into the main search box, do you really know how to get the best out of it? We've done some research and put together a few tips on how to get Google to do even more of the work for you."
PhET is an awesome resource from the University of Colorado at Boulder. The site has interactive simulations for physics, chemistry, biology, earth science, and math that teachers and students can use.