Science

http://www.iwaswondering.org
A cartoon girl guides visitors through free, interactive, science related activities (designed for middle schoolers). 

http://www.spaceweather.com
News and information about sun-earth environment & other interesting information about what's up in space.

http://www.celebrating200years.noaa.gov/edufun/book/welcome.html
To helo you learn more about your world and how NOAA help you explore, understand and protect our Earth.

http://www.manufacturing.stanford.edu
How everyday things are made, sponsored by Alliance for Innovative Manufacturing, Stanford University.

http://www.ubanext.uiuc.edu/gpe/gpe.html
Thorough a series of mysteries, students will improve their understanding of plant science and how foods grow.

http://www.nasm.si.edu
Smithsonian's Air and Space Museum's three online exhibits on aviation.

http://www.wxdude.com
Great weather site for kids.  Includes weather songs.

http://web.mit.edu/invent/inventmain.html
Invention Dimension is a fun-filled and at times wacky approach to making learning about inventions exciting.

http://www.sandiegozoo.org/kids
Discover the San Diego Zoo. Various links for students:  meet critters, science projects, new recipes and zany craft ideas.

http://spaceweather.com/flybys/index.php
Type your zip code and you will find out what is going to fly over your area in the nights ahead.

http://www.teensforplanetearth.org
Learn more about the environment and conservation and use this knowledge to develop a project that'll have a real impact on your corner of the globe.

http://www.exhibits.pacsi.org/nutrition
Pacific Science Center and Washington State Dairy Council, students will be challenged in their knowledge of nutritional facts.

http://www.usap.gov/scienceandeducation.cfm
Understand the world's coldest, driest and harshest continent, its ecosystems and its effects on global processes such as climate.