The National Early Childhood Technical Assistance Center (NECTAC) Technical Assistance (TA) Model for Long-Term Systems Change (LTSC) is grounded in conceptual frameworks in the literature on systems change and systems thinking. The NECTAC conceptual framework uses a logic model approach to change developed specifically for states' infant and toddler early intervention programs and preschool special education service systems, designed to benefit young children with disabilities, from birth through age 5, and their families. NECTAC has supported many states over the last seven years in implementing systems change resulting in improvements for systems that serve young children with disabilities and their families. Three examples are presented in this paper. The examples demonstrate how three states engaged in systems change over time and the types of outputs and outcomes that have resulted. The first state is building a system of accountability and continuous improvement that includes measuring child outcomes. The second is building a system for general supervision and monitoring that uses real-time information to ensure compliance and improve performance. The third example is a state that implemented a process for ensuring quality Individualized Family Service Plans (IFSPs) and family centered services. All three examples demonstrate that successful systems change takes commitment, leadership, involvement of stakeholders, shared vision, strategic activities at all levels of the system, evaluation and monitoring of implementation, and time. [For "Technical Assistance Model for Long-Term Systems Change: Three State Examples. Executive Summary," see ED522125.]