As the Better Math Teaching Network (BMTN) matured, different strategies for sharing network learning emerged. These strategies became more formalized and intentional as BMTN members developed tools and routines to spread the learning. Our multi-year evaluation sought to understand the affordances and constraints of each strategy. In the sections below, we present the five strategies that reflect this developmental trajectory. We begin by providing examples of each strategy. We then identify the resources necessary for implementation and reflect on the affordances and constraints of the strategy. To understand the possibilities for scaling the learning of the BMTN--and other improvement networks--we analyze each strategy using Coburn's four dimensions of scale: widespread use, depth of implementation, shift in reform ownership, and sustainability.