The design of systems requires practical and creative teamwork drawing together concepts from several academic disciplines. Any course of education which aims to teach systems design must reflect this requirement. An excellent method of meeting the requirement in an academic course is the use of case studies. Case studies involve students in understanding an environment, in assimilating information, in examining a situation in breadth and depth, in working in teams, in carrying out realistic design tasks, in practising design techniques, in integrating concepts from several disciplines, and in handling real-life complexities. This paper describes the approach of the Department of Computer Studies and Mathematics, Huddersfield Polytechnic, to the use of Case Studies.