1. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
2. Department of Physics, South Seattle College, Seattle, Washington 98106, United States
3. Gordon School, East Providence, Rhode Island 02914, United States
4. Saranac Lake High School, Saranac Lake, New York 12983, United States
5. International Community School, Kirkland, Washington 98033, United States
6. Department of Physics, University of Washington, Seattle, Washington 98195, United States
7. Department of Natural Sciences, Joliet Junior College, Joliet, Illinois 60431, United States
8. The Lawrenceville School, Lawrenceville, New Jersey 08648, United States
9. University Prep, Seattle, Washington 98115, United States
10. College of Education, University of Illinois at Chicago, Chicago, Illinois 60607, United States