Great Science Sites:
National Geographic Education - lessons and activities
The Science Spot - all kind of science activities
PhysicsLessons.com - lots of topics
PhET - Simulations of all kinds
National Science Digital Library - Great site for lessons!
Wonderopolis - Cool for kids; gives topic of the day with activities
Project Neuron - great site for biology lessons
Event-Based Science - older site with science lessons from the GEMS folks
NASA e-Clips - Innovative Real World Learning
NEW! Interactive Periodic Table - a video about each element from TED-Ed
FunScienceDemosForKIds - a YouTube channel featuring all kinds of short videos teaching basic concepts for kids in K-8
Misconceptions about Science - from Berkeley
MadSciNet: The 24-hour exploding laboratory
The Science Spot - all kind of science activities
PhysicsLessons.com - lots of topics
PhET - Simulations of all kinds
National Science Digital Library - Great site for lessons!
Wonderopolis - Cool for kids; gives topic of the day with activities
Project Neuron - great site for biology lessons
Event-Based Science - older site with science lessons from the GEMS folks
NASA e-Clips - Innovative Real World Learning
NEW! Interactive Periodic Table - a video about each element from TED-Ed
FunScienceDemosForKIds - a YouTube channel featuring all kinds of short videos teaching basic concepts for kids in K-8
Misconceptions about Science - from Berkeley
MadSciNet: The 24-hour exploding laboratory