Building Thinking Classrooms is powerful, but it is also inherently messy. When teachers are actively facilitating a BTC lesson, it is impossible to simultaneously observe the full range of student thinking, teacher moves, and flow of the task. Peer observation provides the perspective needed to refine practice, reveal blind spots, and elevate the quality of student thinking across classrooms.Participants in this session will:Experience BTC from multiple perspectives: as students, teachers, and observersLearn and practice a clear, non-evaluative feedback protocol aligned with BTC practicesRecognize key teacher moves (questioning, autonomy, hints, extensions, consolidation) that are best developed through observationAnalyze a real classroom video to surface strengths and growth areas in BTC implementationPlan how to bring peer observation back to their site to strengthen collective practice