Breastfeeding attitudes are already being formed in the years of preadolescence-adolescence, which means that the educational program should be focused on this age group. For this purpose, many authors suggest that school should be used as an established educational institution and therefore they are developing different education programs. The authors offered an educational program adapted to the cultural, sociological, legal, health, and other specificities of the community to which the students belong. A questionnaire on breastfeeding intentions and knowledge was used to measure the long-term effects of education (after 6 months) in 155 students. They were divided into two groups: experimental (n=101, Grammar School students) and control (n=54, Bjelovar High School students) groups. The experimental group underwent breastfeeding education program, while control group did not. The study was approved by the Ministry of Education and Science, and co-operation with schools was approved by the School Ethics Committees. Six months after educational intervention, students in the experimental group had significantly improved their breastfeeding intentions and knowledge compared to baseline measurement (before intervention). However, 6 months after the education, their knowledge and intentions were less positive than shortly after education, as described in a previous report. The authors suggest that a team of experts be gathered to design a structured educational program that would be interesting to secondary school students. This program should also be adapted to students’ age and interest.