The term sexual education encompasses a whole set of information, skills and values to allow young people to exercise their sexual and reproductive rights and make decisions about their health and sexuality (UNESCO, 2010). The objective of this study is to present the results of the pilot study of the cross-culturally adapted version of the SATZ intervention for middle school students in Porto Alegre (Brazil). This is a quantitative study with a quasi-experimental design with pre and post intervention evaluation. Participants were 30 adolescents with an average age of 15.2 years (DE=0.92). The variables evaluated were the intention to use the condition, assertive communication, knowledge and stigma related to HIV. Preliminary results indicate that 36.4% of adolescents declare that they have had sexual relations. Comparing the responses to pre and post intervention, there is a greater intention to always use the condition in the coming months (68.6% pre and 87.1% post). Respect for knowledge and stigma about HIV: "Healthy profit even with HIV?" (68.6% responded that it was before and 93.5%). In the question "whether young people with HIV should be allowed to attend school" they argued that 62.9% pre and 87.1% post. In the same direction, to the statement "I would visit a friend who was infected with HIV", 62.9% responded "accordingly" (previously) and 80% in the post. It is observed that a greater proportion of adolescents reported feeling comfortable talking about using the conditioner with their couple (pre 70.6% and post 90.3%) and convincing their couple to use the conditioner (pre 74.3% and post 93.1%). The data presented are preliminary, but they show that students have adhered to the intervention, and the initial results indicate that the intervention has positive effects, which must be confirmed with the expansion of the sample.