1 1Department of Physics and the Mallinson Institute for Science Education, Western Michigan University, 1903 W. Michigan Avenue, Kalamazoo, MI 49008-5252 USA.
2 2Wisconsin Center for Education, University of Wisconsin, Research, 1025 W. Johnson St., 570A Educational Sciences Bldg., Madison, WI 53706 USA.
3 3Innovative Science Education, University of Georgia, B210B, Davison Life Sciences, Athens, GA 30602 USA.
4 4University of Colorado Boulder, UCB 390, Boulder, CO 80309-0930 USA.
5 5Rochester Institute of Technology, Center for Advancing STEM Teaching, Learning & Evaluation, 1 Lomb Memorial Drive, Rochester, NY 14623-5603 USA.
6 6Education and Human Resources Programs at the American, Association for the Advancement of Science, 1200 New York Avenue, N.W., Washington, D.C., 20005 USA.
7 7Department of Mathematics and Statistics, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-7720 USA.
8 8Association of Public and Land-grant Universities, 1307 New York Ave N.W., Washington, DC, 20005 USA.
9 9James Madison University, 395 S. High Street, Harrisonburg, VA 22807 USA.