Homework Help for Teens
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Math
Dr. Math Algebra, geometry, trigonometry You need it, Dr. Math has it.
Math League This site helps with algebra definitions.
Purple Math Find help with pre-algebra, intermediate algebra and advanced algebra topics.
Science
AstronomyLearn about the solar system, celestial navigation, sunrise and sunset.
Biology Step-by-step guide to cell division with detailed microscopic pictures.
General Chemistry The periodic table, chemical reactions, a glossary and a mock exam.
Physics Learn about forces and how to measure them and lots of other stuff.