Purpose: Over the past decades numerous policies, programmes and interventions have been undertaken to increase students' participation in physical activity in school. Research shows that intervention effects are mostly related to the way in which the program or policy is implemented, nevertheless, few studies have focused on the implementation…

This qualitative case study reports and interprets school principals' perceptions of their role in implementing and sustaining Second Step, a social skills development programme. The study compares schools that implemented the programme as a formalised strategy for all teachers and those that did not. The results suggest that the key features of…