Science Fair Project Resource Guide
http://www.ipl.org/youth/projectguide/
This site is part of the Internet Public Library and has a large number of links to sites that will guide you through a project, explain the scientific method, give ideas for projects, and help you make a good display. This is a great starting point.
Experimental Science Projects: An Introductory Level Guide
http://www.isd77.k12.mn.us/resources/cf/SciProjIntro.html
This site gives a good step-by-step explanation of the scientific method which should be used for science projects. It also links to An Intermediate Level Guide for further information:
http://www.isd77.k12.mn.us/resources/cf/SciProjInter.html
National Student Research Center
http://youth.net/nsrc/sci/sci.index.html
This database of student research gives actual science projects done by students, from hypothesis to conclusion. Click on any of the links in the list to read about the science projects.
Science Fairs Homepage
http://www.stemnet.nf.ca/~jbarron/scifair.html
This Canadian site lists topics of science projects according to grade level. These lists offer many good ideas.
Science Club
http://www.halcyon.com/sciclub/
This site has student projects and ideas and links to other good science sites.
The Ultimate Science Fair Resource
http://www.scifair.org/
A collection of science projects with suggestions for report writing and display. Includes links to project and laboratory equipment.