National Center for Science Education: resources for teaching evolution in the classroom. This group shares interesting reports of experiences educators have around the country in facing controversy.

http://ncse.com

Smithsonian Institute: excellent resources for engaging activities and ideas for integrations of science across the subject areas, cultures, settings.

http://www.si.edu/Educators

http://earthscienceguy.blogspot.com

http://www.challenge.kidwind.org

GREAT ideas you can use right now to teach all areas of science.

http://learningcenter.nsta.org/

Web site subscription available to get frequent alerts of interesting celestial phenomena.

http://earthsky.org

Highly engaging resource for students and teachers. Sharp, cheery, funny graphics with real science embedded.

spaceplace.nasa.gov