This paper reports on the professional development of teacher educators within the context of a national project, ‘Professional Quality of Teacher Educators,’ where a professional standard and a standards-based procedure of (self-)assessment and professional development have been created and effectively implemented. This project offered a unique opportunity to analyze the goals, activities and outcomes of the process of professional development of teacher educators in a situation in which this development is promoted by the professional group as a whole. In the research, the authors used 25 completed portfolio’s made by teacher educators participating in the standards-based procedure of (self-)assessment and professional development.