Mathematical modelling concerns the description and handling of real world problems with the aid of mathematics. The mathematics is then used to come up with (partial) solutions by further analysing, simulating, or optimizing the characteristics of the problem. Mathematical modelling is used in industry and consultancy. It requires a firm background in mathematics in order to have a good idea of the mathematics relevant for the problem. After experiences with modelling as parts of previous courses, the present course takes students through the different stages of the modelling process (problem analysis, designing the model, mathematical analysis, implementation, validation). Students work in teams in order to develop a mathematical model for a problem coming from an applied setting. The model must be such that it reasonably represents the underlying situation and such that it enables the students to propose a (partial) solution to the problem. The students are guided through this process by a tutor. Every week the students give a presentation on their progress on each of the modelling stages at a discussion session where they get feedback from their tutor and from their colleagues. The results of the project are summarised in a report where the students detail their problem, the development of their model, the verification and validation of the model, and finally their conclusions. At the end of the course the students present their results to all the participants in the course.