This session is for those who provide PD and/or support teachers in their math teaching practice. In this session, the Math Collaborative Team from Riverside School Board (QC) will engage participants in tasks and reflective experiences focused on planning and facilitating professional learning grounded in the Building Thinking Classrooms (BTC) approach. We will explore how the team at RSB has used and adapted the BTC approach for teaching teachers about mathematics teaching (it’s very meta!). This workshop will demonstrate how “Teacher Tasks” and other professional learning structures can be used to develop specific BTC practices, such as Giving Hints and Extensions. This workshop will provide practical strategies and insights for designing impactful, BTC-aligned professional development.