Professional Learning Communities (PLCs) are ongoing groups of educators who work collaboratively to improve student outcomes. The key ideas of a PLC are ensuring all students learn, cultivating a culture of collaboration through teamwork, and making decisions based on data and results. Effective PLCs operate under shared assumptions that continuous learning among educators is key to improved student achievement. They focus on critical questions about what is taught, how learning is assessed, and how to help students who are struggling or have already mastered the material. Collaboration is emphasized through establishing team norms, pursuing measurable goals, and providing relevant information to staff.