Rhett Krawitt, 6, outside his school in Tiburon, Calif. Seven percent of the children in his school are not vaccinated. Courtesy of Carl Krawitt hide caption

itoggle caption Courtesy of Carl Krawitt

A marijuana bud displayed in Denver. Don't legalize pot, the pediatricians say, but don't lock teenagers up for using it, either. Seth McConnell/The Denver Post/Getty Images hide caption

itoggle caption Seth McConnell/The Denver Post/Getty Images

Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption

itoggle caption iStockphoto

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

Dr. Stephen Teach helps Jeffery Ulmer listen to his daughter Alauna's asthmatic breathing at Children's National Medical Center in Washington, D.C. Alauna's mother, Farisa, holds her. The District has one of the highest rates of pediatric asthma in the country. Jahi Chikwendiu/Washington Post hide caption

itoggle caption Jahi Chikwendiu/Washington Post

The Juvenile Justice Delinquency and Prevention Act allocates grant money to states, which are supposed to protect young offenders and make sure they're not housed with adult criminals. Whistleblowers say they've spent years flagging problems with the programs. David Goldman/AP hide caption

itoggle caption David Goldman/AP

The San Francisco-based startup CellScope has built a tool to do ear exams at home, instead of going to the doctor. Cellscope hide caption

itoggle caption Cellscope

Samples of carrots cooked three ways are placed on a table for the kids at Walker-Jones Educational Campus, in Washington, D.C., to sample after they have finished lunch. The crowd favorite will later end up on the school lunch menu. Claire Eggers/NPR hide caption

itoggle caption Claire Eggers/NPR