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500 Natural Sciences

125 Great Science Videos: From Astrology to Physics to Psychology (a list of free links from Open Culture)

Kids Discover Online – Sign up for a free account and access free science resources.

510 Mathematics

Math and Arts Collection – Grades PreK-7th (Using Dance, Drama, Music, and Visual Arts, this collection correlates math to everyday life. )

Peg + Cat Collection – Math for Grades PreK-2, from NPR

PBS Math Club Collection – Math for Grades 6th-9th

520 Space

530 Physics

540 Chemistry

Chem4Kids – Not just for kids! Chemistry help for students.

ScienceGeek.net – This website is offered by a high school science teacher for his students and others. Students and teachers may print, or download and use any materials that you find helpful.

550 Earth Sciences

551 Geology, Hydrology, & Meteorology

National & Local Weather

National Weather Service

National Hurricane Center

560 Fossils

570 Biology

580 Plants

590 Zoology