Three schools spent time learning together in a Learning Forward Colorado Summer Institute focused on Learning Forward's book "Becoming a Learning System" (Hirsh et al., 2018). The book and the sessions with co-author Frederick Brown provided the blueprints and tools for building-based educational leaders to navigate a process for addressing each school's problem of practice through the concept of a theory of change. The school leaders began meeting on a monthly basis. They became a community of practice and supported, monitored, and encouraged each other. Although they pursued different problems of practice and navigated different challenges, they learned from one another's contexts, questions, and strategies. Working together broadened their perspectives and helped them address their own unique problems of practice. To highlight the learning from this effort, in this article the principals of the three schools to share their problems of practice, the processes they used to address them, and their key lessons. Their experiences and reflections can guide others to engage in sustained, collaborative learning communities to address problems of practice and improve teaching and learning.