The landmark study of Perry Preschool tracked a group of poor African American youngsters from when they attended pre-kindergarten in Ypsilanti, Mich., in the early 1960s until they were well into middle age.
The findings are astonishing: a $17 return to the individual and society for every dollar spent on their early education. Those who went to Perry were considerably more likely than children who didn't attend preschool to have graduated from high school and married, significantly less likely to have gone to prison multiple times and to have been on welfare. They're earning an average of $20,800 a year. That's 25% more than similar children who lacked the preschool experience — enough of a difference to lift them above the poverty line.