Kids build robots with Popsicle sticks at an Oakland meeting of Hacker Scouts, a group that encourages young people to create do-it-yourself crafts and electronics. Jon Kalish for NPR hide caption

itoggle caption Jon Kalish for NPR

David Thweatt, the school superintendent in Harrold, Texas, is seen in 2008. Troubled by school shootings around the country, Thweatt decided to arm school staff. Tony Gutierrez/AP hide caption

itoggle caption Tony Gutierrez/AP

Parents leading a revolt to take over an elementary school say it has failed their children. From left: Cynthia Ramirez with her son, Mason; Doreen Diaz; Bartola DelVillar; and Kathy Duncan. Claudio Sanchez/NPR hide caption

itoggle caption Claudio Sanchez/NPR