This article describes how the National Commission on Teaching has sought to implement its recommendations by working with partner states, districts, and stakeholder organizations that are committed to improving the quality of teaching. By creating a comprehensive agenda, democratizing the process of reform, and developing collaborative partnerships, the commission has stimulated substantial ongoing reform in policy and practice. As in the professionalization of medicine, law, and other fields, the creation of a professional accountability system for preparation and practice is a critical next step. If all teachers are to have access to knowledge and all students are to have access to well-prepared teachers, universities and schools will need to develop new partnerships and joint commitments to a democratic profession of teaching based on shared accountability for teacher education.