(Sample link) NASA for high school students http://www.nasa.gov/audience/forstudents/9-12/features/index.html
(Sample link) National Geographic http://www.nationalgeographic.com
Elements and Periodic Table http://www.webelements.com/webelements/elements/text/K/econ.html
Nomenclature http://dbhs.wvusd.k12.ca.us/webdocs/Nomenclature/Nomenclature.html
Mass Spec http://www.colby.edu/chemistry/OChem/DEMOS/MassSpec.html