A framework for urban public high school reform is presented for managing site-based change through re-envisioning, reculturation, restructuring, and remoralization. The four Rs for reform framework is elucidated through a qualitative study of a low-performing urban public high school that was transformed into a new more successful school. The article concludes with a discussion of how all four pieces of the reform framework must fit and work together before notable change can occur. (Contains 1 table and 2 notes.)