When it comes to salty french fries or pizza served at lunch, schools may get more time to dial back sodium content, thanks to a provision in the federal spending bill headed for a vote on Capitol Hill. Joe Raedle/Getty Images hide caption

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Students are given healthy choices on a lunch line at Draper Middle School in Rotterdam, N.Y., in 2012. To keep students from tossing out the fruits and vegetables they're served, researchers say it helps to give them a choice in what they put on their trays. Hans Pennink/AP hide caption

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Students Dakota Gibson (left) and Gary Barber with school volunteer Kenny Thompson after their StoryCorps interview in Houston, Texas. StoryCorps hide caption

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Patrick McCoy (right) and Harry Fowler of Schwan's Food Service show off their company's Big Daddy's pizza at the School Nutrition Association's national conference in Chicago in 2007. Brian Kersey/AP hide caption

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Suzy Amis Cameron, wife of director James Cameron, and gardener and educator Paul Hudak inspect seedlings in the MUSE School CA greenhouse in Calabasas, Calif. Amis Cameron, who founded the school with her sister, wants the school menu to be entirely plant-based by fall 2015. Eliza Barclay/NPR hide caption

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Currently, half of all products served in the school lunch program must be "whole-grain rich," which USDA defines as products made of at least 50 percent whole grain. According to the new standards, by the start of the next school year, schools must use only products that are whole-grain rich. Rogelio V. Solis/AP hide caption

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First lady Michelle Obama has been doing a lot of high-fiving with schoolchildren like these in Dallas to promote healthful lifestyles. Now she's diving more deeply into the politics of school lunch. LM Otero/AP hide caption

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Michelle Obama eats lunch with school children at Parklawn Elementary School in Alexandria, Va., in 2012. The first lady unveiled new guidelines Tuesday aimed at cracking down on the marketing of junk food to kids during the school day. Saul Loeb/AFP/Getty Images hide caption

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When schools close for bad weather, some kids miss out on much-needed nutritious meals. "It's hard to be a hungry person, and it gets harder when the weather is like this," Nancy Roman, president of the Capital Area Food Bank in Washington, D.C., says of severe cold and snow. Jessica Glazer/NPR hide caption

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Uintah Elementary School in Salt Lake City, where up to 40 students were served lunch Tuesday — only to have it discarded. They were told they didn't have enough credit on their accounts. Google hide caption

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