1. Center for Science Teaching and Learning, Northern Arizona University, Flagstaff, Arizona 86011, United States
2. Graduate
Group in Science and Math Education (SESAME), University of California at Berkeley, Berkeley, California 94720, United States
3. College of
Education, University of Oregon, Eugene, Oregon 97403, United States
4. Science Department, Boston Latin School, Boston, Massachusetts 02155, United States
5. Policy, Organization, Measurement, and Evaluation (POME), University of California at Berkeley, Berkeley, California 94720, United States
6. Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States