This document discusses how to ensure professional learning communities (PLCs) have their greatest impact on student learning. It recognizes five core factors that influence PLC impact, including developing critical mind frames in teachers over time. Teachers must focus PLC discussions on student learning, not just teaching, and develop instructional protocols for these discussions. Common challenges can help PLCs view assessments as feedback to foster shared understanding of student progress. The document provides strategies to increase efficacy, empowerment, relational trust, and authentic instructional norms and protocols in PLCs. Developing the right mind frames to guide team efforts towards maximum impact is important.