The document discusses the roles and responsibilities of teacher leaders. It begins by outlining 10 common roles of teacher leaders according to Cindy Harrison and Joellen Killion: resource provider, instructional specialist, curriculum specialist, classroom supporter, learning facilitator, mentor, school leader, data coach, change catalyst, and learner. The document then examines challenges teacher leaders face in balancing organizational demands with classroom responsibilities. It also reviews several studies on how teacher leaders develop legitimacy within their schools and the support structures needed to avoid burnout. Overall, the document provides an overview of the concepts and skills involved in teacher leadership.