At the Lenox Academy in Brooklyn, N.Y., educators try to teach kids to see struggle as a normal part of learning. Tovia Smith/NPR hide caption

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Michelle Kosilek in a New Bedford, Mass., court in 1993. When Kosilek was known as Robert, he was convicted of the 1990 murder of his wife. Lisa Bul/AP hide caption

itoggle caption Lisa Bul/AP

Ross Miner skates during the men's short program at the 2013 Skate Canada International last year. He hopes to qualify for the upcoming Winter Olympics. Dave Sandford/Getty Images hide caption

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Jimmy Greene holds a picture of his daughter, Ana, as he kisses his wife Nelba Márquez-Greene, at a January news conference in Newtown, Conn. They try to remember the good days with their daughter. "It is what brings me great comfort and great joy," Márquez-Greene says. Jessica Hill/AP hide caption

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Avielle's artwork hangs on the walls and windows of Jeremy Richman and Jennifer Hensel's home. Craig Ruttle/AP hide caption

itoggle caption Craig Ruttle/AP