The purpose of this study was to investigate gender bias in pre-service principals using the Gender-Leader Implicit Association Test. Analyses of student-learning narratives revealed how students made sense of gender bias (biased or not-biased) and how each reacted to evidence (surprised or not-surprised). Two implications were: (1) the need for leadership programs to help students identify and unpack gender bias, and (2) to provide new leaders with strategies to confront and reduce gender bias in the organizations in which they will lead. A model for identifying, confronting, and reducing gender bias is presented as scaffolding to help educational leadership faculty and students understand the pervasive nature of gender bias in order to lead others in the difficult work of "undoing" gender bias. (Contains 1 figure and 4 tables.)