For Teens -

Cool Science for Curious Kids
Cool Science is divided into five main sections: Plant Parts, Air Junk, Critters, Butterflies, and Inch Square. In addition to the information provided on this site, there are interactive games and ideas for exploring offline.

Khan Academy
View one Khan Academy's 1800+ tutorial videos to help increase your understanding of math and science.  The Khan Academy is a not-for-profit 501(c)(3) with the mission of providing a world-class education to anyone, anywhere.

NASA - Students
Maintained by the National Aeronautics and Space Administration, this site has sections devoted to Kids and Students, as well as Popular Topics and Missions. If you sected the student section, there is homework help, internet resources, and learning opportunities available.

Science Resource Center: Experiment Central
Science Resource Center is a database to which the library subscribes. The link above goes to items included in their "Experiment Central". To refine your search, simply go back to "Advanced Search", make sure "Experiment Central" is still listed as the source. And add your topic to the "Title/Headline" field. You may also use this database to locate articles related to your science experiment.

Welcome to the Rainforest
Welcome to the Rainforest features a plant database, gallery of rainforest pictures, articles about rainforest plants, and links to other rainforest related web sites.