About 40 percent of high schools start before 8 a.m., which contributes to chronic sleep deprivation among teens, according to the American Academy of Pediatrics. Chris Waits/Flickr hide caption

itoggle caption Chris Waits/Flickr

Leon Evans, director of the community mental health system for Bexar County and San Antonio, broke through barriers that had hindered care. Jenny Gold/Kaiser Health News hide caption

itoggle caption Jenny Gold/Kaiser Health News

Officers Ned Bandoske (left) and Ernest Stevens are part of San Antonio's mental health squad — a six-person unit that answers the frequent emergency calls where mental illness may play a role. Jenny Gold/Kaiser Health News hide caption

itoggle caption Jenny Gold/Kaiser Health News

Lissette Encarnacion in her apartment at The Brook, a supportive housing complex in the New York City borough of the Bronx. Natalie Fertig/WNYC hide caption

itoggle caption Natalie Fertig/WNYC

Amy Myers talks with her son Kamron, 18, in the backyard of their home in Boise, Idaho. She has found raising a teenager to be extremely stressful. Kyle Green for NPR hide caption

itoggle caption Kyle Green for NPR