This thesis investigates how three high schools based in Stockholm organize their sex education. Do the schools meet the guidelines and policies for sex education or in which way do they not? The study is based on interviews with school staff and is analyzed through a new institutional theoretical perspective. According to the Swedish National Agency for Education, sex education overbridge various subjects; concepts like sexuality, equality, sex and relations are expressed in several high school curriculums. The Swedish National Agency for Education further explain that all teachers are affected by these questions, since it is related to the schools basic principles and values. The main result shows that the quality of sex education is dependent on the commitment from teachers, headmasters and students. Together they create certain norms, values and atmospheres which makes sex education to a very big challenge and sometimes a success.