This thesis is based on an intervention that is built upon a team game called ultimate frisbee, which by its very nature is based on fairplay values and spirit of the game. From this intervention, I seek to answer the thesis's research question on how to understand pupils participation in team games based on fairplay as a health promotion initiative. The Danish public school creates a daily frame for approx. 600.000 children and adolecents (Alvang m.fl. 2010, 7). This means that by far the majority of children and adolescents in Denmark between 6 and 15 years spend a large part of their daily life in Danish public school. For the same reason, det public school represents an obvious setting for work on health promotion.