Urie Bronfenbrenner is almost certainly best known for his theoretical writings about the ecology of human development. His interest in theory was not, however, separate from his practical concerns, particularly those related to early education and care of children and the families and teachers who interact with them. From the role that he played…

The federal Early Head Start (EHS) program began in 1995, and a randomized trial was conducted to evaluate the efficacy of 17 EHS programs. In all, 3,001 low-income families (35% African American, 24% Hispanic, and 37% White) with a pregnant women or an infant under the age of 12 months were randomly assigned to a treatment or control group (with…