This paper has a long and complicated title.The bottom line seems fairly straightforward - that train the trainers (TOT) activities and technical assistance (TA) can lead to success when scaling up the adoption of evidenced based practices.
Am J Community Psychol. 2012 Jun 19.
Using a Training-of-Trainers Approach and Proactive Technical Assistance to Bring Evidence Based Programs to Scale: An Operationalization of the Interactive Systems Framework's Support System.
Ray ML, Wilson MM, Wandersman A, Meyers DC, Katz J.