This policy brief from the Learning Policy Institute describes Tennessee’s Registered Apprenticeship in teaching, the first teaching apprenticeship to be registered in the United States. It explains how the program is governed, funded, and operated, taking a close look at a local teacher apprenticeship program in one school district. The brief concludes with considerations for policymakers who are seeking to expand teacher apprenticeships in other states, including consideration on who could sponsor the program, what pathways could be offered, how apprentices’ tuition and pay could be funded, and which partners would need to be engaged.