International Review of Research in Developmental Disabilities, Volume 54 shares the latest research on the interactions between families of individuals with intellectual and developmental disabilities and service delivery systems. Chapters discuss Strengthening service access for children of color with autism spectrum disorders, Assessing the service impact of early intervention on young children with IDD and their families, Family-professional partnership with refugee families whose children have disabilities, Post high school transition for individuals with Down syndrome, Supporting families and school professionals to be engaged partners in the transition to adulthood for young adults with disabilities, amongst other timely topics.