Sexual education is a social responsibility and is a part of the coherent strategy referred to the introduction in schools in Angola. It was made of a prospective, descriptive and longitudinal study that has been characterized the knowledge of sexual education of students in general education in three schools and the Council of Christian Churches in Huambo-Angola in July 2015. The sample consisted of 386 students chosen randomly; there are no sexual education programs in the education system, there are taboos on sexuality, the respondents do not know the sexual organs and much less contraceptive methods, there are still taboos in sexuality theme approach with adolescents, the results showed.