Many teachers struggle with confidence in mathematics, which often leads them to rely on rote procedures rather than engaging with students' thinking. Furthermore, a lack of deep conceptual understanding can make it difficult to teach ideas flexibly or address student misconceptions effectively. This session tackles these challenges. By providing sustained, classroom-connected professional learning, teacher confidence and conceptual understanding can be strengthened alongside more dynamic instructional practices. Using the Building Thinking Classrooms framework, curriculum leaders will learn how to engage educators in meaningful collaboration. Specifically, participants will dive into hands-on exploration of additive and multiplicative relationships using Cuisenaire rods.