This article documents two professors' inquiry into a lesson on supervising for equity in a supervisor preparation course. Through an iterative process of lesson design, lesson implementation, analysis of student work, and pedagogical discussion, we refine the lesson. Our study sheds light on the potential challenges of preparing supervisors to promote equity, offers pedagogical insights to leadership programs invested in instilling a commitment to social justice, and reflects the promise of collaborative faculty inquiry for curriculum development. The study contains implications for educational leadership faculty and program coordinators as well as facilitators of professional development for school leaders.