Visual Periodic Table http://www.chemsoc.org/viselements/pages/overview.html
National Geographic http://www.nationalgeographic.com
School wikipedia site http://schools-wikipedia.org
Biology site http://www.biology.arizona.edu/
Holt, Rinehart, Winston text book materials (type in keyword HM2 HOME) http://go.hrw.com/gopages/ma.html
Cell activity http://www.harcourtschool.com/activity/cell/cell.html