Professionally Relevant Teacher Education in Collaboration with the Field of Practice contributes knowledge on how teacher education institutions and schools can work together to develop teacher education schools, while also strengthening teacher education’s basis in practice and professional relevance. The anthology’s 16 chapters are based on a comprehensive action research project (with the acronym LUSY) on development of teacher education schools for vocational teacher training. The chapters address theoretical and methodological perspectives on professionally relevant teacher education, as well as findings from a range of spin-off projects included under the LUSY project umbrella. Areas in need of development as experienced by teachers themselves formed the basis for an equitable collaboration between teachers and teacher-educators on various educational activities, as well as on development and research projects. Didactics, peer mentoring, organizational learning, and action research were central elements of the collaboration. The anthology demonstrates how the integration of teaching practice, education, school development, and research can contribute to the development of professional teacher competence. This anthology will be of interest to teacher-educators, teachers, teachers in training, teaching students, and administrators working in educational institutions.