Group work is a teaching method used frequently in Swedish upper secondary schools. In this thesis the authors examine four pupils’ attitudes towards group work. The aim is to enhance understanding of how teachers can improve pupils’ learning abilities when they co-operate using this methodology. Qualitative interviews were conducted to examine the informants’ past experience of group work, how they perceive it functions currently, and why they believe it is used in the school setting. When the interviewees discussed groups in which all group members were motivated, they all were in favor of group work as teaching method. However, they experience that few guidelines are provided on how to conduct well functioning group work and that teachers seldom motivate its use. The authors suggest that teachers should provide more scaffolding on how to work in groups and describe the ideas and advantages prior to group work.