I thank the GTAs who participated in this study, Marsha Ing for her input and assistance with the study, Michael Fugate for his assistance in developing and teaching Biology 301, and Katie Burnette for her assistance in teaching Biology 301. This research on GTAs teaching PD was conducted as part of the BioTAP Scholars program, a component of the Biology Teaching Assistant Project (BioTAP; National Science Foundation RCN-UBE grant #DBI-1247938).