- NASA
- Indispensable resource for information on NASA and space-related fields such as astronomy, geoscience, and aerospace technology. It has up-to-date material of value to almost anyone, from elementary school students and teachers to professional researchers.
- Education World
- Education topics include subjects such as math, social sciences, and history as well as categories such as K-12 schools, educational organizations, and special education. Includes lesson planning, curriculum, books in education, administrators, education site reviews, education news, featured articles, and cool schools of the week.
- Physics 2000
- From the University of Colorado at Boulder, some outstanding Java-based interactive modules for understanding various concepts of modern physics. Site is color coded under three main headings: Physics 2000, Einstein's Legacy, and The Atomic Lab; the latter includes striking and technically sophisticated demonstrations of hot, new results on Bose-Einstein condensations.
- Tree of Life Web Project
- Includes over 4,000 Web pages and 526 scientist contributors worldwide. Each page within the tree presents information written by experts on a group of organisms. Most also provide images and extensive bibliographies.
- Fact Monster
- Learning Network site combines essential reference materials, fun facts, features and individualized homework help. Intended for children aged 9 to 14, the resource presents the following 10 subject categories in both text and graphic formats: World & News, U.S., People, Word Wise, Science, Math, Sports, Cool Stuff, Games and Quizzes and Homework Center.
- Ben's Guide to U.S. Government for Kids
- With the goal of providing learning tools for K-12 students, parents, and teachers, Ben's Guide describes how the U.S. government works and shows students how to use GPO Access to locate primary source materials for school assignments. It is divided into four grade levels (K-2, 3-5, 6-8 and 9-12).
- Science Daily
- Provides headlines and links to the day's top science news stories, as well as links to major subject areas in science, health, and computing. Sources, along with links to original news releases, are given for all article. You can view the information in a variety of other languages including German, Spanish, French, and simplified English.
- Children's Literature Web Guide
- Provides rich resources in children's literature for teachers, librarians, scholars, parents, and even children