Background: While statistics related to the sexual abuse of people with developmental disabilities are alarming, there remains a gap in the services and supports available to promote sexual health and healthy relationships and prevent sexual abuse of this population. Objective: To develop and deliver a sexual health education programme for adolescents with developmental disabilities and to identify the reactions and perceptions of students, teachers and parents involved in the programme. Methods: Using an interprofessional collaborative community development model, we developed and delivered a sexual health programme to young people aged 16-21 years with developmental disabilities in five Saskatchewan, Canada high schools. The project adapted, modified and administered the Canadian Red Cross RespectED questionnaires to all participants following the programme to allow for the identification and implementation of best practices with regard to the project's future operation. Results: Data collected from the feedback and comments were summarised, and major concepts were identified. The information gathered identified meaningful educational experiences for students, their parents and teachers. Conclusion: Project findings reinforce the importance of sexual health education for people with developmental disabilities to increase opportunities for healthy sexual relationships and intimacy, to promote positive sexual identities and to decrease the risk of sexual victimisation.