Innovative teaching concepts such as problem-based learning (PBL) can make a difference in an academic setting, particularly when dealing with diversity, and support the successful completion of students' studies. Introducing new approaches to teaching requires the professionalization of the teaching staff and the development of new tools. As a view from the field, this contribution describes the steps taken at TH Köln--University of Applied Sciences to introduce PBL and discusses empirical and practical aspects of a university-wide implementation. It offers lessons learned from the practical application of PBL theories in a real-life setting.