Interest has rapidly increased in studies that randomly assign classrooms or schools to interventions. When well implemented, such studies eliminate selection bias, providing strong evidence about the impact of the interventions. However, unless expected impacts are large, the number of units to be randomized needs to be quite large to achieve…

This paper describes the support of secondary pupils at risk of school exclusion through a course of group work designed to promote individual responsibility for behaviour. Following self-reflection the young people are encouraged to write their own behavioural targets and consider their progress in working towards them throughout the six-session…