The climate transition, energy supply and technological development are just some examples of areas where knowledge from several disciplines needs to come together to find relevant solutions. Engineering students are therefore often given the opportunity to work on interdisciplinary projects. But the term "interdisciplinary" encompasses widely differing ideas about what the teaching should involve and what students are actually expected to learn. This is shown by a study in which researchers interviewed 18 teachers at Chalmers University of Technology in Sweden, Aalto University in Finland and Aalborg University in Denmark. The paper is published in the Journal of Engineering Education.