What is a teacher leader? Developing a common definition has proven elusive, both for teachers and for the administrators supervising them. Despite the different terms used, the consensus is that teacher leaders are people who use their skills outside the classroom to help others at the school, district, state, or national level.

ASCD is seeking input from across the globe to help answer the question, "How do we cultivate and support teacher leaders?"

P.J. Caposey serves in the dual roles of high school principal and assistant superintendent for the Meridian CUSD 223, a small district about 120 miles west of Chicago.

Brianna Crowley is an English teacher and instructional technology coach at Hershey High School in Pennsylvania.

Fred Ende is assistant director of curriculum and instructional services for the Putnam/Northern Westchester BOCES, a regional education center in Brewster, N.Y.

Jennifer Orr, a 1st grade teacher in a Title I school in Annandale, Va., has found a way to be a leader in her school, in her district, and nationally through presentations, writing on the art and science of teaching, and interacting with teachers through social media and her blog.