| | District 100 website: can access grades online
http://www.district100.com
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| | Textbook online
http://www.phsuccessnet.com
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| | Volcano world
http://volcano.oregonstate.edu/
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| | How volcanoes work
http://www.geology.sdsu.edu/how_volcanoes_work/
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| | Earthquakes for kids
http://earthquake.usgs.gov/learning/kids//
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| | Plate tectonics information (Enchanted Learning)
http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Continents.shtml
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