What is the key difference between a school that has isolated pockets of differentiation and a school that has a culture of differentiation? The principal. The courageous principal is key to creating lasting change for differentiation at the school and district levels. In this session, see how one district uses an administrative professional learning community, walk-throughs, the evaluation process, faculty meetings, communication tools, and strategic planning to enculturate differentiation. The presentation will include video clips and artifacts. Participants will receive handouts.