I investigated how preservice instrumental music teachers understand and describe their teacher identity through the use of metaphor in a one-semester instrumental methods course emphasizing authentic context learning. Twenty-five third-year instrumental methods course music education students created a personal metaphor to explore their professional identity construction. Preservice teacher metaphors were revisited throughout the semester, while students participated in an authentic context learning experience in an urban instrumental music classroom. Data sources included student artifacts, informal interviews, and observation/field notes. The impact of teaching within an authentic learning context appears to enrich the ways in which preservice teachers are able to articulate details of their metaphor descriptions. Through their reflections across the semester, preservice teachers demonstrated how personal metaphors were used to restructure their understandings of teacher identity and capture some of the complexities of becoming teachers.