How can you help start and sustain an ambitious and equitable mathematics program in your school? In ambitious mathematics programs, (a) the curriculum uses nonroutine, discipline-aligned tasks, (b) teachers elicit and respond to student thinking, (c) the classroom environment positions students as mathematical authorities, and (d) equity is an overriding focus. In this interactive session, participants will engage in a discussion using an interactive model and discussion guides developed from a case study of an urban school that developed and implemented an ambitious mathematics program. The model is not prescriptive, but rather, is designed to spark reflection and inspire action.