As interest in teacher leadership has grown, many leading organizations have developed tools and guidance to support schools, districts, and teacher leaders themselves. In collaboration and consultation with the Regional Educational Laboratory (REL) Midwest Educator Effectiveness Research Alliance, REL Midwest and the Center on Great Teachers and Leaders developed this tool for teachers to self-assess their knowledge, skills, and competencies to serve in teacher leadership roles. Teachers, working either on their own or with their peers, coaches, or evaluators, can use this tool to assess their level of readiness for being a teacher leader and develop a plan to prepare themselves for leadership.