- AAA Math - Over 1700 pages of free online interactive arithmetic lessons, problems and games for grades K-8.
- California Science Center - Stimulates curiosity and inspires science learning in everyone by createing fun, memorable experiences.
- Coolmath.com, Inc. - Offers calculus, geometry, and mathematical games, for kids, teens, parents and teachers too.
- Education Unlimited, Inc. - A summer academic enrichment program providers.
- Energy Quest - Offers energy and environmental education services for students, parents and teachers.
- Kids Gardening - Explores gardening resources for family, teachers and beginner or experienced gardeners.
- Melissa Kaplan's Collection - Provides information on the captive care and behavior of green iguanas, and other reptiles and amphibians.
- National Geographic Society - Features different people, animals, and places each month with facts, games, activities, and related links.
- Rodale Institute - Devoted to research, education and certified organic production.
- Science News for Kids - A new Web site devoted to science news for children of ages 9 to 14.
- Scientific American, Inc. - Offers news and features on science issues that matter including earth, environment, and space.
- Space Place - Offers games, animations, projects, and fun facts about Earth, space and Technology.
- The Tech Museum of Innovation - Engages people of all ages and backgrounds in exploring and experiencing the Technologies affecting their lives.
- USGS National Center - Provides earthquake information for current and past earthquakes, hazards and preparedness information.