A Beginner's Guide to the Earth's Magnetosphere
A concise, clearly-written, informative overview written by S. W. H. Cowley. Contains several black-and-white illustrations and a brief glossary of terms. First published in 1996 in the American Geophysical Union's education outreach magazine Earth in Space and now available on the AGU's Web site at http://www.agu.org/sci_soc/cowley.html.

ESA's SPace ENVironment Information System (SPENVIS)
This WWW site provides on-line access to standard models of the space environment and its effects on spacecraft. Help and background information on the models and the environment are provided as well. This site would be helpful for classroom projects or preparing classroom material. http://www.spenvis.oma.be/spenvis/

Exploration of the Earth's Magnetosphere
A comprehensive tutorial on the Earth's magnetosphere by D. P. Stern and M. Peredo. This is an excellent resource for undergraduates, science teachers, and advanced high school physics students. Includes interesting information about the history of space physics research. Provides a useful glossary, with hyperlinked definitions in the text. Amply illustrated. The authors are both space physicists at NASA's Goddard Space Flight Center. http://www-spof.gsfc.nasa.gov/Education/Intro.html

Windows to the Universe
Enter the"Windows to the Universe" site and click on "Our Planet" to link to an overview of the Earth's magnetosphere. There are links from this page to others dealing with such topics as "What is a magnetosphere?" and "What is interplanetary space?" as well as descriptions of specific magnetospheric regions and processes. Good information about the Earth's magnetosphere is also available at the "Explore the Sun-Earth System" page of the "Window's" "Space Weather" page . Information on the magnetospheres of Mercury, Jupiter, Saturn, Uranus, and Neptune is also available on the "Windows" site.

Oulu Space Physics Textbook
The magnetosphere page of the Oulu Textbook, with links to other pages that deal with different magnetospheric regions and processes. http://www.oulu.fi/~spaceweb/textbook/magnetosphere.html

What is the magnetosphere?
This site is a brief illustrated introduction to the Earth's magnetosphere, prepared by the Space Plasma Physics Branch at NASA's Marshall Space Flight Center. The material is presented on a level accessible to the general public, including middle school and high school students. http://wwwssl.msfc.nasa.gov/ssl/pad/sppb/edu/magnetosphere/

Data from Spacecraft in the Magnetosphere
This page has a brief description of the magnetosphere, and links to data about protons and electrons in the magnetosphere, and magnetic field measurements. http://www.eiscat.rl.ac.uk/~ian/msphere_now.html

The Earth's Magnetosphere
A description of the Earth's magnetosphere, with a movie and a large collection of links on the magnetosphere in the news. http://helios.gsfc.nasa.gov/magnet.html

The Magnetospheric Yellow Pages
Serves as a directory to magnetospheric and physics data servers from a variety of sources, including ACE and ISTP. http://nssdc.gsfc.nasa.gov/spdf/yellow-pages/