During 2018 and 2019, a working group of district and charter school leaders and other education stakeholders from urban and rural locations across the state met to explore ways to increase the effectiveness of principals leading Massachusetts schools. The Barr Foundation engaged Attuned Education Partners to facilitate this group and lead implementation of the learning agendas developed by its members. Together, they prioritized key challenges and identified solutions that research suggests are most likely to strengthen principalship and drive better outcomes for students—especially the students of color and English learners that the state is currently serving least well. This summary highlights their findings and insights. See the full report for more on the challenges and solutions—plus case studies and recommended action steps for state policymakers, school system leaders, principal preparation program providers, and funders.