Terms such as professionalism and professionalization play a central role in teacher education, yet it is often only inadequately clarified what these terms entail. Therefore, Jana Krüger examines the educational personnel involved in teacher education. In the practice of teacher education, those individuals who are directly involved and implement and shape the training within the framework of legal requirements should be able to provide insights into professionalism and professionalization: the training personnel in the preparatory service for teaching at vocational schools. This group has received little attention in empirical educational research so far. Jana Krüger presents the individual "teacher educator" with regard to their sociodemographic as well as personal and professional characteristics. On the other hand, her work aims to...