The U.S. Department of Agriculture's proposed new rules for school snacks promote healthier options, like the fruits and vegetables served in this Palo Alto, Calif., cafeteria. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

Randi Weingarten, president of the American Federation of Teachers, says a bar exam for K-12 teachers would test a person's knowledge based on the subject he or she was hired to teach. Rebecca Cook/Reuters/Landov hide caption

itoggle caption Rebecca Cook/Reuters/Landov

Nkomo Morris, a teacher at Brooklyn's Art and Media High School, works on her classroom computer in New York. Bebeto Matthews/AP hide caption

itoggle caption Bebeto Matthews/AP

Indiana Gov. Mike Pence delivers his State of the State address to a joint session of the Legislature in Indianapolis on Tuesday. Darron Cummings/AP hide caption

itoggle caption Darron Cummings/AP

New education standards place more emphasis on nonfiction reading and writing over fiction works. Some say this could lead students away from a passionate engagement with literature. Chris Sadowski /iStockphoto hide caption

itoggle caption Chris Sadowski /iStockphoto

Garfield High School's academic dean and testing coordinator, Kris McBride, at a news conference announcing the teachers' boycott of the MAP test in Seattle on Jan. 10. Ann Dornfeld for NPR hide caption

itoggle caption Ann Dornfeld for NPR