I hope participants will leave with a renewed vision of what geometry and proof can be in a Thinking Classroom. They will see how BTC routines can support not just content understanding, but also meta-cognitive thinking, logical reasoning, and epistemic awareness.Participants will walk away with:A concrete progression for scaffolding proof through BTC practicesIdeas for embedding informal argumentation starting from the first day of classA rationale for teaching formal logic as a bridge to deductive proofAn understanding of how Euclidean geometry supports epistemological developmentAnd an open invitation to connect with me and others in this work, to share ideas, materials, and continue growing a community of educators committed to reimagining geometry through the principles of BTC