We would like to acknowledge the participants for their time and effort. We kindly thank Sarah Baas Robinson, Erin Dolan, Julie Dangremond Stanton, Regina Frey, and Jennifer Loertscher for their helpful feedback during the development of our lesson materials. We thank Sarah Baas Robinson, Kush Bhatia, Jamie Pham, Justin Rubin, and Ave Fouriezos for their assistance with data collection. We also thank Vanessa Alele and Grace Snuggs for their assistance with coding and scoring. Special thanks to Dan Hall and Huimin Hu of the University of Georgia, Athens (UGA) Statistical Consulting Center and Hye-Jeong Choi for their advice with statistical analyses. We also express gratitude to our supportive colleagues in the Biology Education Research Group at UGA for their helpful feedback on earlier drafts of this article. P.P.L. would like to thank the UGA Study in a Second Discipline program for the fellowship that led to collaboration with L.F. S.M.H. would like to thank David Live for introducing her to L.F.’s research and the ARCS Foundation for its financial support. This material is based upon work supported by the National Science Foundation under grant no. DRL1350345.