ABSTRACT:This study examined the implementation phase of a four‐year research project to test the effectiveness of strategies to increase diffusion of Smart Choices, a school‐based tobacco prevention program. The impact on curriculum implementation of two approaches to teacher training are compared. School districts were randomly assigned to a live workshop training or video training condition. The outcome of the evaluation was teachers' implementation of Smart Choices Results show a lower proportion of video‐trained teachers implemented the curriculum, but overall completeness and fidelity of implementation for those teachers who did teach the curriculum were comparable for the two groups. Video‐trained teachers, however, were less likely to use brainstorming and student presentations/role plays, two of the methods prescribed by the curriculum. Implications of the results for teacher training are di
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