The purpose of this document is to provide an overview of factors to consider when developing, implementing, and sustaining memoranda of understanding (MOUs) at the State level to create a coordinated approach to service delivery to improve outcomes for young children who are at risk for or have a developmental delay or disability. While this document focuses on IDEA and Head Start programs, States may wish to consider whether MOUs with the relevant early care and education partners may be helpful to provide seamless services to young children with disabilities and their families. (author abstract)