America’s Children: Key National Indicators of Well-Being, 2007 is a biennial report to the Nation on the condition of children in America. Nine contextual measures describe the changing population, family, and environmental context in which children are living, and 25 indicators depict the well-being of children in the areas of economic security, health, behavior and social environment, and education. This year’s report has special features on children with asthma, children with specified blood lead levels, and parental reports of children’s emotional and behavioral difficulties. In addition, the report includes a special section on family structure and the well-being of children.