On Grandma Lieselotte's birthday, a thief was lurking around who stole her wallet. Was the culprit one of her guests? The ten learning stations on the topic of verbs are embedded in an exciting crime story: the children go on a chase after the wallet thief, gather clues about suspects, and ultimately find the perpetrator. In the process, the children intensively track the word class verb and engage in grammatical investigative work through careful language observation. The special feature: the investigation sheets for examining the verbs are available in several differentiation levels, for example, there are some detective magnifying glasses as memory aids for children with learning difficulties. In the police school, the students practice and reinforce the identified language phenomena.