The original purpose of this work was to try to meet the demands posed by the new national curriculum. However, during the process the focus was shifted towards the learning process itself and school as a learning organization. At the beginning students learning in groups, students motivation and understanding of their own learning was seen as most important. But also the teachers who tried to implement problem based learning as a teaching method noticed that their way of thinking changed; they learned how to teach. This process, learning as an implication of working together as a team, became the most important part of my study. The teachers experiences of the workshops they organized for primary school teachers were especially valuable considering present and future action. The different culture of primary schools when compared to secondary schools became visible. As the primary and lower secondary schools now are combined to a comprehensive school this difference in culturemust be recognized.