The advantages and potentials of case study work are well known. However, the use in German large university courses and the use as a competence-oriented examination are still not common. This article aims to address this unrealized potential of case studies by presenting a scientifically sound and effective teaching concept that has been designed, implemented, and evaluated over three semesters in a bachelor module with about 400 participants. Students indicate that the teaching concept leads to high satisfaction, high motivation, high learning success, and fun. This evaluation emphasizes the use of case studies as a competence-oriented examination, even in large courses.