This document provides an overview of professional learning communities (PLCs) including definitions, core values and concepts. It discusses that a PLC is an ongoing process where educators work collaboratively in cycles of inquiry to improve student results. The key ideas of a PLC are ensuring all students learn, a culture of collaboration, and having a focus on results driven by data. Teams must establish clear norms for collaboration and assess their effectiveness regularly. The document outlines cultural shifts needed for a successful PLC, including changing the focus from teaching to learning and using formative assessments to guide intervention.