CT Science Olympiad: http://www.ctscienceolympiad.org/
Yale Invitational: http://yuso.yale.edu/
MIT Invitational: http://scioly.mit.edu/
Science Olympiad - discussions, practice tests, and notes- http://scioly.org/wiki/index.php/Main_Page
Yale Invitational: http://yuso.yale.edu/
MIT Invitational: http://scioly.mit.edu/
Science Olympiad - discussions, practice tests, and notes- http://scioly.org/wiki/index.php/Main_Page