Animals

1. Animals and Nature - DKfindout!

2. Animal Kingdom - DKfindout!

3. Dinosaurs and Prehistoric Life - DKfindout!

4. Human Body - DKfindout!

5. National Geographic for Kids

6. Natural Selection - PhET

7. Nature's Sounds - animals

8. Watch the Birdy - PBS Kids

Plants

1. Plants - DKfindout!

Ecosystems

1. Alaskan Adventure - PBS Kids

2. Backyard Life - PBS Kids

3. Coasts - DKfindout!

4. Defenders of Wildlife - Wildlife and Wild Places

5. Deserts - DKfindout!

6. Food Chains - DKfindout!

7. Food Chain Challenge (Savannah) - BBC Bitesize

8. Food Chain Challenge (Tundra) - BBC Bitesize

9. Food Chain Challenge (Woodland) - BBC Bitesize

10. Habitats and Ecosystems - DKfindout!

11. Pond Life - PBS Kids

12. Wild City Search - PBS Kids

Astronomy

1. Ask an Astronomer - movies

2. Astronomy for Kids: Planets

3. Gravity and Orbits - PhET

4. NASA - The Solar System & Beyond

5. NASA Astronomy Picture of the Day - searchable

6. National Geographic for Kids

7. Space - DKfindout!

Climatology & Meteorology

1. Climate Time Machine - Climate Kids

2. Meet the Greenhouse Gases - Climate Kids

3. Seasons - DKfindout!

4. Weather - DKfindout!

5. Yahoo Weather

Environmental Science

1. Don't Flood the Fidgits - PBS Kids

2. Feed the Fidgits - PBS Kids

3. Fidgit Power - PBS Kids

4. Fidgits to the Rescue - PBS Kids

5. Litter Critters Learn to Sort - ABCYa

6. Take the Recycle City Challenge - Environmental Protection Agency

Geology

1. Crystals and Gems - DKfindout!

2. Earthquakes - DKfindout!

3. Geology.com - Information and Photos for Educational Use

4. Glaciers - DKfindout!

5. Mountains - DKfindout!

6. Rivers - DKfindout!

7. Rock Cycle - DKfindout!

8. Rocks and Minerals - DKfindout!

9. Structure of the Earth - DKfindout!

10. Techtonic Plates - DKfindout!

11. Volcanoes - DKfindout!

Oceanography

1. Coasts - DKfindout!

2. Coral Bleaching - Climate Kids

3. Go With the Flow: An Ocean Currents Game -Climate Kids

4. Oceans and Seas - DKfindout!

5. Rivers - DKfindout!

6. Water Cycle - DKfindout!

Chemistry

1. Energy Forms and Changes - PhET

2. Heat - DKfindout!

3. Solids, liquids, & gases - DKfindout!

4. Materials - DKfindout!

Physics

1. Balancing Act - PhET

2. Balloons and Static Electricity - PhET

3. Circuit Construction Kit: AC-Virtual Lab - PhET

4. Collision Lab - PhET

5. Electricity - DKfindout!

6. Fish Force - PBS Kids

7. Energy Skate Park - PhET

8. Forces and Motion - DKfindout!

9. Forces and Motion: Basics - PhET

10. Light- DKfindout!

11. Magnets - DKfindout!

12. Projectile Motion - PhET

13. Pushes and Pulls - TinyTap

14. Push Pull Puzzles - PBS Kids

15. Sound - DKfindout!

16. States of Matter: Basics - PhET