Teachers are our most valuable resource in education, and teacher leaders can maximize their impact on student learning by extending their impact beyond their own classrooms. Effective teacher leaders share their expertise, support the growth of other teachers, and increase the quality of instruction. This policy snapshot summarizes the literature regarding teacher leadership, including associated benefits and challenges, while also highlighting policy levers that can be used to improve teacher leadership opportunities. We also highlight examples of teacher leadership efforts, including the following programs: (1) The Baltimore City Public Schools Career Pathway Initiative; (2) Iowa's Teacher Leader Compensation System; (3) Tennessee's Teacher Leader Council and Governor's Teacher Cabinet; and (4) Kentucky's Teacher Fellowship Program.