ABSTRACT
The study investigated the level of knowledge of sex education among in-school adolescents in Benin City looking at the influences which gender, class level and school-type whether single sex school or mixed sex school has on the level of knowledge of sex education. Cross sectional survey research design was adopted to study 120 students who were selected to represent the population which comprise all in- school adolescents in Benin City. A self-developed questionnaire was used to collect data from 120 student of which 58 were males while 62 were females. The data was analyzed using percentages and frequency count and also modified Okafor’s (1997) criteria for describing level of knowledge of sex education was adopted. The conclusion of the study is that the level of knowledge of sex education among in-school adolescents in Benin City was high, with gender and school type whether single or mixed school having no influence on the level of knowledge of sex education, and with class level influencing significantly the level of knowledge of sex education.
