The aim of this paper is to present a research that tried to see the differences in the cooperation of Catholic and general high school with parents and students. Parental participation in school work affects a high dose of self-esteem, more positive attitudes towards school and other social phenomena and processes. The process of socialization begins in the family and continues in school. It is for this reason that communication between parents and the school is important. Upbringing and education play an important role in social events and relationships, both today and throughout history. According to the Curriculum in the Republic of Croatia, high school education lasts a total of four years. The end of high school education is the state matura exam and enrollment at the faculty. The programs direct the continuation of education at faculties and thus there is a possibility of improving education at higher levels. In the Catholic school, evangelical principles become the norms of education, the inner mover and final destination of every educator, teacher and children. The Catholic school is a place where everything is based on Christian upbringing. Differences in the participation of cooperation between parents and schools are visible, so a study was conducted in which parents and children from general and Catholic high schools participated. The aim of the research was to examine the extent to which parents are involved in the upbringing and education of their children and to what extent the school encourages or does not encourage cooperation and various activities based on the upbringing and education of children, and what is the children's perception of cooperation and communication. The research was conducted in semistructured interviews, and 12 interlocutors participated. The results showed that there is a difference in collaboration with parents and students in two different high schools. The differences are visible in communication, cooperation with professional associates, performing extracurricular and extracurricular activities. To further improve the situation, it is necessary to make greater efforts to move the basic form of cooperation to partnership.