About one-quarter of lower-income families with school-age children say a mobile device is their only way to access the Internet at home, according to a new study. iStockphoto hide caption

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Amelia Westerdale works with physics students during a tutorial session at the University of Colorado Boulder. Westerdale is part of the Learning Assistant Program, tasked with helping to coach and tutor students. Theo Stroomer for NPR hide caption

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In this Sept. 11, 2013 photo, Saginaw City Manager Darnell Earley appears at a news conference in Flint, Mich. Earley was in charge of both the city of Flint and the schools at key points in their recent turmoil. Zack Wittman/The Flint Journal/MLive.com via AP hide caption

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