The authors conducted this project with funding support from the Teagle Foundation through the Indiana University Collegium on Inquiry in Action (www.iub.edu/~collegia). We especially thank collegium members Mimi Zolan, Melissa Gresalfi, and Tyler Christensen, who provided advice on the design of the intervention and assessment materials. We thank Eli Meir, whose misconception pre- and posttest provided inspiration for our own pre- and postconcept assessment. We also thank the faculty instructor for B300, Eric Knox, and the GTAs who taught in B300 during the duration of the project (W. Beaulieu, M. Bogonovich, B. Mattingly, M. Midgley, S. Shannon, and B. Swedo), as well as our B300 students from 2007 to 2011.