Abstract : The paper is organized as follows. Section 2 sets our motivation by presenting a literature review and the resulting research questions that the paper addresses. Section 3 presents the background on HIV education in Cameroon and the experimental design. Section 4 presents our data, outcomes of interest and empirical strategy. Sections 5, 6 and 7 present the 10 treatment effects respectively on sexual behavior, exposure to HIV education and knowledge (mechanisms), and diffusion to peers and spillovers. Section 8 concludes.