The translation of an evidence-based preschool physical activity intervention from in-person to online delivery of professional development to preschool teachers.

Study of Health and Activity in Preschool Environments (SHAPES) aimed to increase preschoolers' physical activity by engaging preschool teachers in professional development designed to modify instructional practices. SHAPES originated as a randomized controlled trial, tested in 16 preschools and disseminated to 4 control schools, and was shown to be effective in increasing preschool children's physical activity (Phase I, 2008-2012). This article describes the steps taken to translate an evidence-based physical activity intervention, SHAPES, from in-person delivery to online delivery of professional development to preschool teachers. In Phase II (2013-2016), professional development delivery was modified from an in-person to an online program for preschool teachers. Teacher implementation completeness and fidelity were examined in 10 pilot preschools and then replicated in 30 preschools. Large-scale dissemination of SHAPES began in Phase III (2017-2019), reaching 818 teachers from 228 unique centers after 2 years. The final SHAPES program consisted of six online modules, an accompanying guidebook, over 90 activities, self-assessment techniques, a video library, and an electronic community forum. The SHAPES core elements, defined in Phase I, were retained throughout all three phases. The Phase II change to online delivery was characterized by high levels of implementation completeness and fidelity. Results of Phase III statewide dissemination revealed comparable implementation completeness and fidelity. An intervention shown to be effective in a randomized controlled trial can be translated into an online professional development program and disseminated on a large scale in a timely manner.