Introduction The school has now the mission of contributing to the personal and social construction of each student at all levels, particularly in the prevention of behaviours associated with bullying. Therefore, there are many aspects of personal and social development that need to be worked on and discussed throughout each young person’s growth and development. The School of Health of Santarém of the IPSantarém, as a Health Promoting School, has carried out a series of health education sessions with the aim of preventing bullying in the school environment among students in the 1st and 2nd cycle of basic education. Objectives Explain the path taken in the area of personal and social development of students in school context in the prevention of behaviours associated with bullying. Methods Sessions of health education, in class context, using interactive methodologies, namely group work with broad discussion. The discussion comprised the concepts of bullying, aggressor, victim and witnesses. These sessions are developed in basic education, from the 3rd year of the 1st cycle and continuing until the 6th year of the 2nd cycle, in two school groups, from the area of influence of the School of Health of Santarém, beginning in the school year 2009/2010 until the present. Results 90 sessions of health education were developed, with the participation of 1769 students, being verified their interest and involvement, demonstrated by the attention and discussion of the subjects worked in group and framed in the thematic. Having said that, these sessions have been being promoters of health literacy among young people. Conclusions The sessions promoted the open and enlightened debate with the involvement of all, perceiving the awareness to the theme which contributes to promote the health literacy among this population, as well as to the personal and social development of students and consequently to the prevention of behaviours associated with bullying in school.