Kids InfoBits. Grades K-5. Complete with an engaging, developmentally appropriate graphic interface, reference content and magazines for elementary students, Kids InfoBits addresses the way kids learn and conduct research.
Britannica School. Grades K-adult. Searchable database specifically for Grades K-5, Middle and High School. Has images, articles and video on a variety of topics.
Grades 4 and up. Lots of space facts, online activities, and homework help.
Grade 4 and up. This website is dedicated to sustainability and ecological future of our planet.
The Environmental Kids Club
Grade 4 and up. Games and information pages help students understand the importance of recycling, air quality, & waste management
NASA for Students.
Grades K-12. A wealth of material about topics ranging from Astronomy to Earth Science.