Few autism programmes address the needs of adolescents and young adults, and those that do are unlikely to include individuals with autism in the design and evaluation of the programme. This study involved nine youth with autism (ages 16-25) in the development and evaluation of a peer teaching programme where they taught three-dimensional modelling to other students with autism spectrum disorder. The methodology was participant-oriented research where the students with autism were co-designers and programme evaluators in the research. This approach highlighted their unique strengths and abilities and shifted the power such that they were leaders and not simply the recipients of knowledge from instructors. Four themes emerged through the qualitative analysis of the students' perceptions of the peer teaching programme: 1) the meaning of peer teaching, 2) motivations for peer teaching, 3) challenges and 4) coping with the challenges of the role.