The purpose of this study was to investigate processes that led practicing music educators in a graduate course to examine their beliefs and practices regarding inclusion, responsiveness, equity, and justice. Using Charmaz's constructivist approach to grounded theory, we interviewed 22 participants from MUS 8XX: Philosophy of Music Education. Constant comparative analysis yielded an explanatory framework, which we presented as a model and named "transformative learning processes (TLP) for practicing music teachers encountering social justice." TLP comprises four interrelated components: "building 'Gemütlichkeit,'" "grappling with difficult material," "emotional intensity," and "course structures," with "stories" acting as a hub for each of the interconnected categories. By describing processes that led practicing teachers to examine their mindsets and plan to change their practices, TLP could provide guidance for music teacher educators at the graduate level regarding how to approach social justice topics in their teaching.