20140422_me_for_early_childhood_education_tulsa_okla_stands_out_.mp3?orgId=1&topicId=1013&d=254&p=3&story=305692733&t=progseg&e=305814331&seg=6&ft=nprml&f=305692733

The federal government spends almost $8 billion on preschool programs across the country, mostly on low income 4-year-olds. States spend billions more. But with at least 30 states planning to expand access to pre-K and President Obama promoting "preschool for all," what constitutes a quality preschool program?

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