American Mathematics Competitions Friendly mathematical contests for junior and senior high school students.
http://www.unl.edu/amc/

Boosting Engineering, Science and Technology (BEST) In six weeks, high school or middle school student teams design and build a remote controlled robot to compete against other schools. http://www.bestinc.org

Bayer/NSF Award for Community Innovation Competition for teams of middle school students to find creative solutions to problems in their communities.
http://www.christophercolumbusawards.com/

Discovery Young Scientist Challenge A national science fair competition for grades 5-8. Students are nominated to take place in the DYSC by representatives at their local science fairs. 40 finalists will come to Washington for a week in October to participate in the competition finals.
http://school.discovery.com/sciencefaircentral/dysc/

FIRST Robotics Competition High school teams build robotics to compete in a national competition. http://www.usfirst.org

The FIRST LEGO League (FLL): Using LEGO Mindstorms Robotics Invention System technology, middle school student teams build robots to compete in robotics.
http://www.firstlegoleague.org

Future City: National competition in which 7th and 8th graders learn and explore engineering to create a city of the future, using reality-based education software SimCity 2000.
http://www.futurecity.org

Future Scientists and Engineers of America Club Step-by-step instructions on how to start a Future Scientists and Engineers of America Club in your school or neighborhood.
http://www.fsea.org

The Intel International Science and Engineering Fair (Intel ISEF) Held annually in May, the Intel ISEF brings together over 1,200 high school finalists from local and state fairs from 40 nations to compete for scholarships, internships, and the grand prize: a trip to attend the Nobel Prize Ceremonies in Stockholm, Sweden.                                   http://www.sciserv.org

The Intel Science Talent Search High schools students compete their independent research projects in this prestigious competition run by Science Service. 10 top scholarship winners are chosen in March with a $100,000 scholarship as the top prize. http://www.sciserv.org

The Internet Science and Technology Fair Student teams use the Internet to. Teams are judged on the web page that they produce, relating their project and findings. http://istf.ucf.edu