Frito-Lay reformulated Flamin' Hot Cheetos, a perennial favorite among school kids, to meet new federal "Smart Snack" rules for schools. Meredith Rizzo/NPR hide caption

itoggle caption Meredith Rizzo/NPR

A lunch served by the Yarmouth, Maine, School Department on Sept. 26, 2014, featured Sloppy Joe's made with Maine beef and local beets, carrots, apples and potato salad. More than 80 percent of Maine schools said they served local foods in a survey conducted by the USDA. U.S. Department of Agriculture/Flickr hide caption

itoggle caption U.S. Department of Agriculture/Flickr

A baked potato with toppings on a lunch tray at a school in Wisconsin. Students are less likely to eat fruits and vegetables if they're rushing to get to recess, researchers say. Micheal Sears/MCT/Landov hide caption

itoggle caption Micheal Sears/MCT/Landov

Erica Johnson prays before her meal. She volunteers at the food pantry at John Still school where three of her four children are students. She eats alone after she feeds her kids. Andrew Nixon/Capital Public Radio hide caption

itoggle caption Andrew Nixon/Capital Public Radio

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

itoggle caption Joe Raedle/Getty Images

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

itoggle caption Hans Pennink/AP

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

itoggle caption StoryCorps

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

itoggle caption Brian Kersey/AP

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

itoggle caption Eliza Barclay/NPR

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

itoggle caption Rogelio V. Solis/AP

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

itoggle caption LM Otero/AP