In recent years learning how to work in teams has become a common subject in higher education. Communication between student team members can be monitored using a bulletin board system, and hence, analyse individual and group role development. The composition and distribution of roles in a team are relevant characteristics that will considerably improve the learning experience for students. A balanced role distribution will make the group work better having higher learning results. In this paper we present a method to help teachers guiding student groups in order to have a higher effectiveness. Using a Computer Supported Collaborative Learning content analysis model, the communication of a group is analysed and its role distribution obtained. Studying this role distribution the instructor will be able to guide student groups to obtain better results. We also present an experience involving six groups of university-level Computer Engineering students. (Contains 8 tables.)