Children in early child care settings experience transitions for various reasons. Research suggests that external, center-to-other-setting transitions can have negative impacts on young children, families, and child care centers. What are the potential impacts of external transition on children, families, and centers? How are children affected by support for or lack of continuity of care? Proactive prevention planning and intervention may reduce the need for transitions. Preventative and intervention planning, coupled with best practices for implementing unavoidable external transitions, may help reduce negative impacts. This series explores these issues and offers a framework for centers to develop external transition prevention and intervention plans and provides best practice considerations for implementing unavoidable external transitions.