A common practice among clinical psychologists and other health professionals is the use of school-based sexual health promotion programs as a means for preventing sexually transmitted infections. A fundamental criterion for the designing and adaptation of these programs is the age of their target populations because limited education and language are the most relevant factors that limit the efficacy of these programs. In this paper, we proposed a methodological approach that facilitates the empirical evaluation of the written materials that accompany the school-based sexual health promotion programs, taken as a case a Spanish-written program used in Colombia. The results showed the empirical adequacy of this program while positing novel insights for scrutinizing the efficacy of similar programs.