iScienceProject - Science projects, contests and competitions using HOBO data loggers for teachers and their students in grades 5-12.

Intel International Science and Engineering Fair - ISEF provides worldwide competitive scholarships, tuition grants, internships, scientific field trips. Winner attends Nobel ceremony.

High School Einstein Awards - Offers questions and answers about science competition, lab and safety issues. Provides teacher resource and gives rewards to technology enabled schools.

Jeunesses Scientifiques de Belgique - Site of the Belgian science fair: information, tips, application forms, project examples, exchange between science fairs. Most of the pages are in French.

School Science Fairs - Designed to aid students in the most difficult aspect of their science fair experience: getting an idea.

Intel Science Talent Search - Formerly Westinghouse Science Talent Search. Continuously operated by Science Service, Inc.

iExperiment.com - An online store providing information and prices for scientific equipment and kits, the site also provides ideas and resources for science fair projects.

Science Competitions - NSTA position statement.

Siemens Westinghouse Science and Technology Competition - The Siemens Westinghouse Science and Technology Competition is a national research competition in the sciences and mathematics for high school students. It awards $1 million in scholarships annually.

Discovery Channel: Science Fair Central - Separate science fair guides for students, teachers, and parents.

Science Fair Videos - offering a number of science fair and invention videos for use at elementary, middle and high schools the site also provides a comprehensive list of science fair resources.

Science Fair Projects - A list of science fair links, a review of science fair books, and some suggestions for science fair projects.