Outcomes
Prevalence of smoking in the past week in the year group of the school (defined as students smoking a cigarette in the previous 7 days)
Self report (some saliva samples taken to assess misreporting, not to correct self reported data) at baseline, 1 year follow-up and 12 control schools at 2 year follow-up
follow-up: lmmediately post intervention, 1 and 2 year follow-up