Chemistry for Kids - This site is better for the older students studying matter, atoms and elements. It does, however, touch on younger SOLs along with including other useful links.
Biology for Kids - Some basic biology, but mostly for upper grades, even into middle school.
Cosmos for Kids - All about astronomy! Includes videos and related links!
Physics for Kids - Includes information on magnetism, motion, heat, electricity and light! Loads of information!
All About Birds - This site includes maps, sounds and so much information on hundreds of birds! You can see their habitat, food sources, fun facts, behavior and even conservation information! However, the birdcams are blocked.
NASA Kids'Club - A place to play games, complete stem activities and learn about NASA.
The Why Files- The science behind the news!