Carolyn Walworth is a junior at Palo Alto High School (the main building of which is shown here in 2012). After four recent suicides in her school district, she wrote an op-ed about the stress faced by students in the area, which is home to some of the nation's most competitive public high schools. Ho John Lee/Flickr hide caption

itoggle caption Ho John Lee/Flickr

David Hermlin is a singer, dancer, musician and songwriter — oh, and a global activist, too. Sample lyric: "I will fight for my dream, and I will never give up." Courtesy of David Hermlin hide caption

itoggle caption Courtesy of David Hermlin

They're members of the global-minded teens club: (left to right) Toluwanimi Sola-Adeyemi of Lagos, Chloe McGill of Seattle and Emine Arcasoy of Chapel Hill. Courtesy of Tolu Sola-Adeyemi, Chloe McGill and Emine Arcasoy. hide caption

itoggle caption Courtesy of Tolu Sola-Adeyemi, Chloe McGill and Emine Arcasoy.

Research into how the human brain develops helps explain why teens have trouble controlling impulses. Leigh Wells/Ikon Images/Corbis hide caption

itoggle caption Leigh Wells/Ikon Images/Corbis

Jackie Fortin's daughter, Cassandra, last summer. Courtesy of Jackie Fortin hide caption

itoggle caption Courtesy of Jackie Fortin
Maria Fabrizio for NPR

An inmate at Rikers Island juvenile detention facility carries a plastic fork behind his back as he walks with other inmates. A recent report found that juvenile detainees are subjected to routine violence, both by other inmates and by correction officers. Julie Jacobson/AP hide caption

itoggle caption Julie Jacobson/AP

Jamira, 11, is an aboriginal girl in Australia. "I like being special," she says. "I like being — you know — different than everyone else." Henrik Nordstrom/I Am Eleven hide caption

itoggle caption Henrik Nordstrom/I Am Eleven