http://www.usgs.gov/education/index.html

The Learning Web, a portion of the USGS website, is dedicated to K-12 education and life-long learning. Explore things on, in, around and about the Earth such as land, water, plants and animals, and maps.

http://www.nwf.org/education/

For more than sixty years, the National Wildlife Federation has been a leader in environmental education, reaching out to the communities where children and adults live, work and play. Explore NWF's educational pathways to understanding, appreciating and safeguarding the natural world.

http://www.healthychoices.org/

The Healthy Choices for Kids nutrition education program was created by the growers of Washington state apples and is funded in part by the Washington Apple Education Foundation, Tree Top, Inc., and other industry sponsors. All materials are copyrighted, however any educator may freely copy and distribute all content for use in a classroom setting.

http://www.windows.ucar.edu/

Windows to the Universe is a user-friendly learning system on the Earth and Space sciences for the use of the general public. Since 1995, we have been developing an innovative and engaging Web-site that spans the Earth and Space sciences. Our goal in this new millennium is to continue to build an internet site that includes a rich array of documents, including images, movies, animations, and data sets, that explore the Earth and Space sciences and the historical and cultural ties between science, exploration, and the human experience. Our site is appropriate for use in libraries, museums, schools, homes, and the workplace. Students and teachers may find the site especially helpful in their studying (and teaching!) Earth and Space sciences. Because we have users of all ages, the site is written in three reading levels approximating elementary, middle school and high school reading levels. These levels may be chosen by using the upper button bar of each page of the main site.

http://www.monarchwatch.org/

Monarch Watch is an educational outreach effort based at the University of Kansas that engages citizen scientists in large-scale research projects. It is one of the most successful and well-known outreach programs in the country and is producing real data, which is published in a "Season Summary", that relate to a serious conservation issue.

http://kids.msfc.nasa.gov/

NASA KIDS offers a fun way for children to learn about NASA's activities and science, using interactive tools and kid-attractive pages.  NASA KIDS is an on-line or printable resource designed for kids aged 5 to 14. 

http://liftoff.msfc.nasa.gov/

LIFTOFF offers a fun way for teens to learn about NASA's activities and science, using interactive tools and kid-attractive pages.  LIFTOFF is an on-line or printable resource designed for kids aged 13 and up.

http://quest.arc.nasa.gov/index.html

Meet the people of NASA and look over their shoulders as they make NASA's goals a reality. Whether in the area of aerospace design or training for space walks, NASA Quest is a rich resource for educators, kids and space enthusiasts who are interested in meeting and learning about NASA people and the national space program. NASA Quest allows the public to share the excitement of NASA's authentic scientific and engineering pursuits like flying in the Shuttle and the International Space Station, exploring distant planets with amazing spacecraft, and building the aircraft of the future.

http://seawifs.gsfc.nasa.gov/ocean_planet.html

Ocean Planet, premiered at the Smithsonian Institution's National Museum of Natural History from April 1995 to April 1996, where it attracted nearly two million visitors. This electronic online companion exhibition contains all of the text and most of the panel designs and images found in the traveling exhibition.

http://www.questacon.edu.au

Questacon believes that a hands-on minds-on approach is a great way for people of all ages to learn. Experience the fun and excitement of science and technology right here in Fun Zone!

http://www.carolhurst.com/

This site is a collection of reviews of children's books and ways to use them in the classroom. You can look them up by title, author, type, or age, and browse them in categories such as curriculum area, subject, and theme.

http://etext.lib.virginia.edu/

Hundreds of hypertext books, available for downloading. Huge resource.

http://onlinebooks.library.upenn.edu/

The Online Books Page is a website that facilitates access to books that are freely readable over the Internet. It also aims to encourage the development of such online books, for the benefit and edification of all.