Maxine Hall, the new principal at Northwest Middle School, knew when she started that the school was suffering from a sense of distrust between teachers and administration, as well as a high degree of student disengagement and absenteeism. To unlock student achievement and instill much-needed consistency and alignment across the school, Hall implemented data-driven instruction, but her efforts were stymied by an unwillingness to change among staff and teachers. This case is used at Darden in executive programs for leaders in education and second-year MBA courses on leading change. It would also be suitable in courses covering data-driven instruction, school transformation, leadership, and change processes.