This paper evaluates SHAPE (Sexually Harmful Adolescent’s Progressive Education), a group-based intervention programme for sexually harmful adolescents which teaches psychological and social skills in order to address areas of need associated with risk. The SHAPE programme was run twice with three participants in each group (N=6). Results indicated that there were some significant changes to participant’s beliefs and attitudes as well as levels of anger control. These results suggest that the SHAPE programme is effective at delivering its aims but further data is required to assess the impact of the programme on actual offending behaviour.