Reflective practice has potentially positive effects on an organization's capacity to focus on student learning and teaching practices. In an effort to comply with policy and provide teachers with opportunities to reflect on their practice, districts, schools, and teachers have turned to various models that feature collaborative experiences. One such model is the Critical Friends Group (CFG), focusing on the improvement of practice and learning experiences for children, using protocol-driven structured conversations. This article examines the mechanisms that support and sustain reflective practice within a community of practice and utilizes Wenger's three dimensions of practice--mutual engagement, joint enterprise, and shared repertoire. The study followed a CFG in an elementary school using ethnographic case study methods to conduct a close examination of CFG meetings, protocol use, and analysis of teacher interviews. The propensity to "look out" at school-wide issues vs. looking in at classroom practices, perceptions about feedback on classroom practice, and using protocols to guide conversation emerged from the data as prominent mechanisms in communities of practice. CFG facilitators and coaches, as well as participants must be explicit about the purposes of their work and protocol use alone does not ensure a focus on student learning and teaching practices.