This toolkit is a research-based resource for OST leaders, staff, and teams who want to make data-driven decisions as they prepare to implement or change an initiative. Toolkit sections include: (1) learning about readiness; (2) assessing readiness; and (3) using resources aligned to your readiness. It may help to also listen to the February 23, 2023 webinar that is a conversation with field leaders from 4-H, YMCA, and Playworks who have integrated tools into their work. See: https://www.air.org/event/getting-ready-change-out-school-time-new-tools-resources-and-conversation-field-leaders