The Center for Public Integrity’s Ben Wieder performed the analysis of U.S. Department of Education data. This story is featured on the April 2015 episode of “Reveal.”

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Susan Ferriss is a reporter with wide experience at home and abroad. She has investigated a range of issues, from military toxic waste and real-estate fraud to police corruption and international drug trafficking. She covered California state government and politics for several years, and was a prize-winning foreign correspondent in Latin America, where her reports included stories on child labor, child migration and transnational gangs.