Cada dólar investido na educação pré-escolar de crianças em risco dá um retorno de 8 a 9 dólares

For many kids, the most important years of schooling come before they can even read. Consider the groundbreaking work of the Nobel Prize-winning economist James Heckman, who has repeatedly documented the power of early childhood education. One of his best case studies is the Perry Preschool Experiment, which looked at 123 low-income African-American children from Yspilanti, Michigan. (All the children had IQ scores between 75 and 85.) When the children were three years old, they were randomly assigned to either a treatment group, and given a high-quality preschool education, or to a control group, which received no preschool education at all. The subjects were then tracked over the ensuing decades, with the most recent analysis comparing the groups at the age of 40. The differences, even decades after the intervention, were stark: Adults assigned to the preschool program were 20 percent more likely to have graduated from high school and 19 percent less likely to have been arrested more than five times. They got much better grades, were more likely to remain married and were less dependent on welfare programs. This is why, according to Heckman and colleagues, every dollar invested in preschool for at-risk children reaps somewhere between eight and nine dollars in return.

In “Does Preschool Matter?

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