Although there seems to be a high level of awareness of the HIV and AIDS menace among the youth, their behavior does not reflect this level of awareness. There seems to be a mismatch between HIV and AIDS Programme objectives and behavior change among the youth. However, this level of mismatch has not been established for effective intervention strategies to be put in place. The purpose of this study was to determine the gap between the objectives and actual HIV and AIDS education programme delivery in Siaya district public secondary schools, Kenya. Four instruments were used in the study: questionnaire, focus group discussions, interview schedule and documents analysis guide. Population of the study was 3205, which comprised of 68 head teachers, 719 teachers and 2418 students. The study selected 1/3 of the population by stratified random technique by sex to form the sample. The study established that whereas students believed they had begun exhibiting the expected change of behaviour, teachers felt that this was minimal to enable them prevent and control the spread of HIV among the youth. This suggested that there seem to exist a gap between objectives and actual HIV and AIDS education programme delivery and behavioral changes among the youth in secondary schools in Siaya district. Strategies of closing the gap are explored from the perspectives of teachers and students respectively. (Contains 2 tables and 1 figure.)