This study evaluates the effects of the Ka Mahuri programme, which is a multicomponent 10-week intervention for 5-8 year-old children displaying antisocial and off task behaviours in their mainstream classrooms. The intervention was evaluated by evaluating the progress of five children across two intakes on nine measures. Although substantial difficulties were experienced in collecting the planned data on the children’s progress, it was apparent from the results that the programme effectively managed the children’s negative classroom behaviour during the intervention. Little evidence of academic gains was apparent and the intended parental involvement only occurred in one case. Further follow up data for each child will be required to determine whether the changes made through the intervention were maintained in the long term.