Collaboration is essential for successful emergency event management. Live exercises are one method to prepare for such emergencies. In this paper, we present and evaluate an exercise model for multi-agency collaboration between first responders that focuses on learning collaboration. The model design emphasises preparation, the learning climate, scenarios that support learning, and reflection. The model is underpinned by a practice perspective on learning and structured reflection. Data were collected from three collaboration exercises using questionnaires in conjunction with the exercise and interviews at a later time after the exercise. The analysis showed that the participants developed a knowledge of collaboration and improved their ability to collaborate in real emergency events. The main contribution of the paper is the validation of a small-scale exercise model that places learning of the subject matter in the foreground, which is shown to be a successful method for developing relevant knowledge. It is concluded that this live exercise model both complements the more commonly used large-scale collaboration exercise model and strengthens emergency preparedness.