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  National Wildlife Federation Lesson Plan Collection

  Environment, Environmental Science, Fun Educational Lesson Plans, Activities and Printables, Life Sciences

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  PTable - Interactive Periodic Table of Elements

  Chemistry

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  Resources for Educators | American Astronomical Society

  Astronomy, Science

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  Resources for Teaching Astronomy

  Astronomy, Science

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  Shared-Care.com

  Life Sciences

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  Space and NASA News - Universe and Deep Space Information

  Astronomy

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  SpaceWeather.com

  Astronomy

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  StarChild: A Learning Center for Young Astronomers

  Astronomy

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  Synapses: Classroom Activity

  Anatomy, Life Sciences

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  The Nine Planets Solar System Tour

  Astronomy