In the past several years, models of multi-tiered service delivery have emerged as a framework for supporting the needs of school-aged children in schools across the country and have received much attention in scholarly publications of education and related fields. Despite the needs of young children and the promise of early intervention, however, models of multi-tiered service delivery are only in the beginning stages of development in early childhood education settings such as preschools. This text provides early-childhood professionals with an introduction to tiered service delivery and practical considerations in the implementation of a multi-tier system of supports with particular emphasis on early childhood law and ethics, assessment and intervention, developmental disabilities, and family engagement.