Because our research investigated two separate student groups from two high schools with different specializations, the results from the two groups will be presented in parallel. The question referring to the risk factors for teenager aggression was answered differently by the students in the theoretical high school versus those in the technological high school. The students in the theoretical high school identified as the most important issue the problems within family, while other factors of risk were identified as: group of friends, aggression by others which triggers more aggressive acts, environment, and aggression and violence on TV. Fig. 2a shows the distribution of the answers by the students in the theoretical highschool. On the other hand, the students in the technological high school identified alcohol consumption as the most relevant risk factor. Other significant risk factors in their opinion were drugs, lack of money, verbal insults and group of friends. Fig. 2b shows the distributions of the answers given to this question by the students from the technological high school.