NASA for high school studentshttp://www.nasa.gov/audience/forstudents/9-12/features/index.html
National Geographichttp://www.nationalgeographic.com
Element Infohttp://www.chemicalelements.com/
Element Infohttp://www.webelements.com/
Visual Periodic Tablehttp://www.chemsoc.org/viselements/pages/pertable_fla.htm
GIZMOshttp://www.explorelearning.com
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