Research demonstrates that strong leadership has a positive impact on school quality. School and district leadership is second to classroom instruction, in terms of its influence on student learning. In addition, effective leaders are an important factor in the recruitment and retention of high-quality teachers. Because of this, states are developing policies to support district and school leaders throughout their careers. This Policy Snapshot -- exploring 2019 legislative activities related to school and district leadership -- organizes legislation around the career continuum: preparation, certification and licensure; induction, mentoring and professional development; evaluation; and compensation, incentives, and contracts.