Bullying is today a major problem in schools worldwide. Far too many children are forced to undergo bullying day in and day out without anyone seeing or doing something. My purpose with this study is to find out how four F-6 schools in a municipality south of Stockholm are describes their work to get zero tolerance for bullying at their school. My questions are: How does the four F-6 schools' anti-bullying group in a municipality south of Stockholm describes their work to have zero tolerance for bullying? What do the employees in the school anti-bullying groups consider that bullying is? Why do the employees in the school anti-bullying groups think bullying occurs? Who do the employees in the school anti-bullying groups think are bullies or are being bullied? To get my results I have done four interviews with those in charge of the school's anti-bullying group. My theory is based on standards, what is acceptable behavior and normative theory, hypotheses, what is right and wrong as well as desirable or undesirable behavior. My conclusion of the study is that schools can work in different ways to fight bullying and that they should adapt their practices after the school´s own problems and circumstances. I have also come to the conclusion that the causes bullying, who or which exposes or is exposed has no correct answer, everyone has different ideas about it.