Direct comparison of different programme providers and training methods. All taught same social influences curriculum, developed at University of Waterloo. See Flay 1985, Santi 1992, Santi 1994. All sessions 40 mins, taught over consecutive weeks; 6 lessons in grade 6 (information on the social consequences and short-term physiological consequences of tobacco use; peer, parent and media influences on tobacco use; modeling and building resistance skills); 3 lessons in grade 7 (review of Grade 6 programme, develop social norms supporting nonsmoking, build awareness of the hazards of secondhand smoke, and develop self efficacy for assertive behaviour around the issue of secondhand smoke), 6 lessons in grade 8 (similar content)
All providers given a manual, audiovisual aids, student workbook, peer leader manual and host teacher manual for each grade unit and a 1 hr orientation session