We thank the participants who took part in this study. We also thank the Biology Education Research Group (BERG) at the University of Georgia, who improved the quality of this work with critical feedback. Special thanks to Gretchen King for her critical review of the article. This material is based on work supported by the National Science Foundation under grants DUE 1347733, “Collaborative Research: A Community of Enhanced Assessment Facilitates Reformed Teaching,” and 1322962, “Collaborative Research: Expanding a National Network for Automated Analysis of Constructed Response Assessments to Reveal Student Thinking in STEM.” Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.