PBS National Video Game Challenge
http://pbskids.org/stemchallenge/#about
Siemens We Can Change the World Challenge
http://www.wecanchange.com/
Intel
http://www.intel.com/about/corporateresponsibility/education/k12/STEMUnits.htm
Kid’s Science Challenge (One of My Favorites!)
http://www.kidsciencechallenge.com/
Competitions
http://www.sciencenewsforkids.org/about-ssp-educational-competitions/
3m’s Young Scientist Challenge
http://www.youngscientistchallenge.com/12challenge/index.html
Exploravision
http://www.exploravision.org/
Do Something Awards
http://www.dosomething.org/awards
More Info Here: http://www.dosomething.org/
Doodle for Google
http://www.google.com/doodle4google/
TONS of Challenges
http://www.instructables.com/contest/
Google Science Fair
http://www.google.com/events/sciencefair/educators.html
Amazing Challenges from Best Buy and Ellen (By Kids For Kids) – Can’t Wait to See What’s Next
http://www.bkfk.com/programs
Puzzle Contest
http://www.johnrausch.com/DesignCompetition/
K’Nex
http://www.knex.com/club/knexpert_vote.php
Lego Robotics
http://www.legoeducation.us/eng/competitions/
Rubberband Contest
http://rubberbandcontest.org/inventions.php
ThinkQuest
http://www.thinkquest.org/competition/
Wouldn’t It Be Cool If…
http://www.wouldntitbecoolif.com/