Internet Public Library: Science Fair Project Resource Guide
A large list of sites about experiments, the scientific method, and presenting projects.

New Book of Popular Science
New York Public Library Card required for home access. A science encyclopedia with over 400 articles geared to student readers. Select New Book of Popular Science then select Projects.

Science Fair Central at discoveryschool.com

Science Online
New York Public Library Card required for home access. Find more than 600 experiments covering key science principles. Each experiment is indexed by grade range and subject. Select Science Online then select Experiments.

YES Mag Science Projects
Projects from the Canadian science magazine for children: YES Mag.