In this paper two major factors of discrimination will be debated. On of a side, one subject of the discussion will be the challenge to discriminate in social environment, especially school environment, because one teenager spends half a day at school where he is forming an entourage or he has to join one, and to be part of an entourage already formed, the teenager has to obey to the rules of that specific entourage. It is possible that one of the rules of the entourage is the discrimination of the people around. On the other hand, in this study we will be discussing the repercussions of discrimination on the both sides, the teenager who discriminate and the teenager who is discriminated. For the research of the repercussions of the discrimination I will use a questionnaire of aggressiveness developed by Arnold H.Buss and Mark Perri. This questionnaire measures four dimenions of aggressiveness like physical aggressiveness, verbal aggressiveness, anger and hostility. The education can establish, without a doubt, a solution on a long term for the problem of one society multiethnic and multicultural. Instead of defensive closing and separation, the school can become a place for opening and communications. From an instrument of assimilation and enhancing nationalist characteristics, the school can become an instrument of teenager’s development, through the respect by the cultural diversity.