NBC Learn has put together some terrific sites for the sciences. The Science of Hockey offers a ten-part video series which includes math and science topics. Chemistry Now has a long listing of topics, including Cheeseburger Chemistry, Chemistry of Chocolate, Chemistry of Household Cleaners and more. Changing Planet has videos about the survival of trees, infectious diseases, coral reefs and much more. Physics, engineering and math are represented in the videos of The Science of Football, and physics, biology, chemistry and math are found in The Science of the Olympic Games.What a super treasure-trove for science teachers!