Captain Stoppelbart, Tesse, Emilia, and Lena - with the help of pirates and superheroes, your students playfully conquer the four cases in this book. This abstract topic is often difficult for elementary school children to grasp. However, when pirates appear as nominative, genitive, dative, or accusative, the children are eagerly engaged. The book provides materials for a hands-on approach to teaching, where students learn step by step to correctly identify the different cases. The foundation is a story in which the pirates embody the various cases through their names or roles. This brings grammatical terms to life and makes them memorable for the children. The diverse and varied exercise materials are perfectly aligned with the stories, turning the learning of the four cases into an adventure for the children.