This study deals with the professional development of Content and language integrated learning (CLIL) and the specific implications for professors at the university level. Many universities find themselves in a puzzling situation: An educational institution in which teacher training plays a small role. Undoubtedly, there are some specific considerations related to professionals in higher education, their needs and their expectations. Without the practical element, professional development in education is detached from the setting and the real challenges professors face every day. This study explored the question of whether participatory action research can provide meaningful experiences that add to good teaching practice.