Lesson plans, etc. science information infrastructure (http://www.exploratorium.edu/learning_studio/sii/)
An excellent location for online Physics activities and an index of other Physics sites. (http://www.physics.uoguelph.ca/tutorials/index.html)
Challenger Center for Space Education (http://www.challenger.org/)...Educational simulations, activities, news,
and information. Challenger Center focuses specifically on comets,
Mars, Earth, the Moon, International Space Station, the Space Shuttle,
space probes, and the Solar System in general.
http://swift.sonoma.edu --- Swift's Education and Public Outreach Page contains curriculum materials, information about educator training, as well as various interesting multimedia.
http://www.smv.org/hastings/teacher.htm --- This is an activity for grades 5-9 titled "Classifying Galaxies: A lesson on how Galaxies are classified by shape." Includes procedure, resources, and ties to science framework.
http://mo-www.harvard.edu/MicroObservatory/
This site allows educators and students to control several telescopes to observe various celestial objects. The Micro Observatory can be a very exciting resource for high school teachers working with students on astronomy, or undergraduate astronomy professors. And the service is free!
http://www.opticsforkids.com/teach/teach.cfm
The teacher's corner on Optics for Kids includes lesson plans and educational activities, conveniently separated by grade-level
http://www.astrosociety.org/education/publications/tnl/56/
"An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time." This is a good resource for educators who need to describe a very old and large Universe to a skeptical classroom. Provides some guidelines for teachers and some information for the general public.
http://www.iit.edu/~smile/index.html (http://www.iit.edu/%7Esmile/index.html)
This site is an index of over 100 experiments appropriate for a range of ages. The physics section includes matter, mechanics, fluids, optics and waves, and electricity and magnetism.
http://www.astrosociety.org/education/activities/astroacts.html
Astronomy Activities collected by the Astronomical Society of the
Pacific. Includes activities for all grade levels. Give your
students the opportunity to explore subjects like galaxies, planets,
life beyond Earth, stars, telescopes, and much more!
http://ret005t6.eresmas.net/english/html/
This site offers computer shareware and freeware for various astronomy
applications. Ranging from observational astronomy to computational
astrophysics, there's a wide range of software for a variety of
computer platforms.