The Technical Assistance Center on Social Emotional Intervention for Young Children (TACSEI) Roadmap on "Data Decision-Making and Program-Wide Implementation of the Pyramid Model" provides programs with guidance on how to collect and use data to ensure the implementation of the Pyramid Model with fidelity and decision-making that improves the provision of implementation supports, delivery of effective intervention, and the promotion of meaningful child outcomes. The roadmap was developed through the contributions and knowledge of multiple faculty members working with the Center on Social and Emotional Foundations for Early Learning (CSEFEL) and the Technical Assistance Center on Social Emotional Intervention for Young Children (TACSEI). Their efforts to develop meaningful measures and data decision-making tools were conducted in partnership with the numerous demonstration sites, programs, coaches, and state leadership teams within CSEFEL and TACSEI states. This document reflects over a decade of collective effort to identify or develop data decisionmaking tools that were useful, efficient, and reliable.