Churn: The High Cost of Principal Turnover urges decision-makers and funders to prioritize principal retention alongside pipeline development efforts. While focus has been placed on getting talented leaders into schools, the lack of ongoing support for principals leads to high turnover, negatively affecting schools, teachers, and students. The report highlights the significant impact of principal turnover and proposes solutions, including continued leadership development, peer networks, one-on-one coaching, and revised district supervisor roles to strengthen retention and extend the benefits of pipeline investments.