During the last three decades Swedish education has undergone radical decentralisation involving increased school autonomy. One aspect of this change is the gradual weakening of the state regulation of teaching time. Thus, Sweden is somewhat of an extreme in the EU. This is accentuated by a five-year experiment, where 900 compulsory schools were allowed more freedom in the allocation of school hours. Thirty teachers from three compulsory schools participating in the experiment were interviewed and team meetings observed during a two-year period. The article explores and analyses changes in time-distribution, classification and framing of the curricula and teachers' work in the three teams and their classes, and analyses teachers' experiences of the changes. A major trend towards weakened classification and framing was found. A majority of the teachers were positive to more flexible time use, teamwork and cross-disciplinary studies. However, despite the experiment a majority still felt inhibited by the national time schedule and too little time for development work. Variations between the three cases are discussed in terms of different team cultures. The school characterised by development-oriented culture had changed their work and teaching most. (Contains 3 tables.)