October 2013 Focus Issue: Developing and Empowering Teacher Leaders Are you a teacher leader? Whether you describe yourself as a math coach, math specialist, mentor, or the classroom teacher to whom everyone turns for support—you are a teacher leader. A mathematics teacher leader wears many hats: mentor, data analyst, instructional collaborator, content and process facilitator, researcher, resource provider, observer, teacher, learner, and student. The Editorial Panel of Teaching Children Mathematics is interested in manuscripts that examine ways to improve the teaching and learning of mathematics through empowering teacher leaders.