The NSCAW is a nationally representative, longitudinal survey of children and families who have been the subjects of investigation by Child Protective Services. There have been two cohorts of children enrolled in the survey, which makes available data drawn from first-hand reports from children, parents, and other caregivers, as well as reports from caseworkers, teachers, and data from administrative records. NSCAW examines child and family well-being outcomes in detail and seeks to relate those outcomes to experience with the child welfare system and to family characteristics, community environment, and other factors. In 2015, the third cohort of NSCAW study was conducted. NSCAW, overall, makes available nationally representative longitudinal data drawn from first-hand reports of children and families or other caregivers who have had contact with the child welfare system. Data from service providers are also collected.