A case study examining the extent to which the child welfare, early care and education, and Individuals with Disabilities Education Act (IDEA) early intervention systems are collaborating to promote the school readiness needs of children under age five in the child welfare system in Colorado. The study is based on field interviews with approximately 150 key agency staff and survey interviews with approximately 500 foster parents and 200 child welfare caseworkers, and explores: (1) barriers to and facilitators of collaboration at the state, county and local levels; and (2) the degree to which children in the child welfare system are being linked to the IDEA early intervention and early care and education (ECE) programs. This research informs policy and program choices about best practices and models for how the multiple agencies which provide these services can coordinate their efforts.