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Science
General Resources
Free homework help and answers for textbook questions.
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Resources to introduce very young children to STEM topics.
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Biology
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Phet Interactive Biology Simulations.
Chemistry
Free chemistry courses.
Not free, but teaches chemistry in a fun way, through a video game.
A free virtual reality chemistry game show.
A game to provide a mnemonic base to learn organic chemistry.
A living library of chemistry.
Interactive chemistry simulations.
Astronomy
National Aeronautics and Space Administration
Public resources to aid those interested in Astronomy, Space Science, and Physics.
A portal to information about the Earth and Space.
Physics
A living library of physics.
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