Many schools begin their Building Thinking Classrooms (BTC) journey by adopting random grouping and vertical boards, yet these tools often lack a strategic purpose. Without moving beyond this mechanical implementation, students miss out on the genuine thinking, clear collaboration norms, and supportive environments necessary for making mistakes and formalizing learning. Designed for coaches and school leaders, this session focuses on how to support teachers in moving past these initial steps toward a deeper, more effective model. We will explore high-leverage practices—including sequencing thinking tasks to ignite curiosity, structuring consolidation to ensure shared understanding, and shifting note-making to occur after the learning has happened. Participants will leave with a clearer blueprint for scaling their implementation and concrete strategies to build their teachers' capacities and self-efficacy toward a sustainable Thinking Classrooms.