Introduction:
The OdontoSesc Mobile Units are an itinerant project of the Social Service of Commerce that offer free dental treatment and health promotion activities to the general population. Objective: it was proposed the development of training work for students of a public school in order to make them multipliers and disseminators of relevant topics related to oral health in Conceição de Jacareí, District of Mangaratiba, Rio de Janeiro/Brazil.

Methodology:
A health fair model presentation was chosen. For the elaboration of the event, there was a selection of students, who were divided into groups and each one was assigned a theme: evolution of caries; periodontitis; dental trauma; dental prosthesis and oral self-examination. The training of the students was conducted by the health team with weekly meetings for the practical and theoretical development of the themes.

Result:
The health fair provided the students involved with the transmission of knowledge to other students and the population in general, about the knowledge acquired by promoting the autonomy of self-care.

Conclusion:
the development of health fairs is an important tool for the transmission of knowledge. A legacy is left and empowerment is generated regarding the knowledge acquired in favor of the well-being of the community.