The aim of the research was to determine the differences in unacceptable behaviors of students with regard to the areas of extracurricular activities they attend. The total sample of primary school teachers was 121, which was assessed by 136 students, who in their opinion show certain unacceptable behaviors. Descriptive data of extracurricular activities of students show that on average they attend extracurricular activities in the field of art (27.21%), then in the field of physical health (25.74%), then in the field of language and communication (17.65%), practical work and design (11.76%), and somewhat less in the field of science and mathematics (10.29%) and the field of social sciences and humanities (5.15%). They attend the least activities in the technical-technological area (2.21%). After analyzing a number of socio-demographic factors, Karlovac County schools have significantly higher scores in a number of unacceptable behaviors compared to other surveyed counties. There were also statistically significant differences in behavioral problems with regard to the age of students, ie these unacceptable behaviors have significantly more students in higher grades. A statistically significant difference was also shown for the family structure factor with regard to emotional difficulties, ie students of single mothers have more unacceptable behaviors. A statistically significant difference was also shown for the number of household members with regard to problems in student behavior, ie this unacceptable behavior is more common in students from large families. A statistically significant difference was also shown for the realization of friendly relations of peer problems and prosocial behavior, where students who have problems with peers develop less friendly relations in their environment than students who have more developed prosocial behavior.