Programs in teacher leadership have emerged as a growing number of teachers look to advance their careers and stay in the classroom. Exactly how many teacher-leadership degree programs exist is difficult to determine since no organization tracks them separately from other master's offerings in educational leadership. But a review of U.S. education schools by "Education Week" identified more than 60 such programs. Many of them have gained prominence and visibility as the result both of the introduction of online course offerings and the growing interest in career development for teachers. Teacher-leadership programs generally differ from traditional education administration or leadership master's programs in focusing more on instructional practice and less on organizational supervision and the business and management of schools. The course offerings in teacher-leadership programs vary from school to school, but tend to emphasize inquiry-based instruction, coaching and mentoring, cultural responsiveness, professional-development design, curriculum development, and technological understanding. Most programs also require degree candidates to complete an internship or capstone project involving collaborative work with school leaders or a practice-based research project. School of education professors and administrators involved in teacher-leadership degree programs say such offerings fill an important need in K-12 education today by giving teachers the capacity to expand their roles and exert greater influence in schools.