The purpose of this study was to contribute to and expand the scholarship on teaching and mentoring. The questions guiding this qualitative study were as follows: First, how do mentors gain their expertise? Second, what support do they need to promote their continued development? The context of this study was a teacher training academy. Data were collected from eight mentor teachers in three ways--through individual interviews, focus group interviews, and participant observation. Results indicate that mentors conceptualized their work into two distinct roles: teaching and mentoring. Recommendations are provided for developing and supporting mentors' practice.