President Obama has announced a cure for the country's social ills: universal preschool. It would help children "read and do math at grade level, graduate high school, hold a job, form more stable families of their own," and also reduce teen pregnancy and violent crime, he said in his State of Union address. As evidence for these remarkable claims he pointed to Oklahoma and Georgia, the early adopters of universal preschool. But as Shikha Dalmia and Lisa Snell report, the real evidence from those states suggests that preschool doesn't deliver on even its most basic promises.
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