Sgt. Mark Miranda, a public affairs specialist at Joint Base Lewis-McChord in Washington state, demonstrates the use of a program in July 2011 that was designed to help calm symptoms of post-traumatic stress and traumatic brain injury. A new class of apps is offering more sophisticated mental health help to struggling teens, including emergency, 24/7 connection to counselors. Ted S. Warren/AP hide caption

itoggle caption Ted S. Warren/AP

Examples of what the iPhone app looks for: The white reflection from an otherwise dark pupil can indicate a tumor, a cataract or other eye problems. Claire Eggers/NPR hide caption

itoggle caption Claire Eggers/NPR

Teachers are incorporating mobile technology and a digital sensibility into classroom lessons with assignments such as this one: to caption a historical photograph for teacher Nicholas Ferroni's high school history class in Union, N.J. Courtesy of Nicholas Ferroni hide caption

itoggle caption Courtesy of Nicholas Ferroni

Will Davidson and his Minecraft creation, modeled off the Santa Cruz Mission Steve Henn hide caption

itoggle caption Steve Henn

Lively is a sensor that can be attached to a pill box, keys or doors. It lets people know whether aging parents are taking their medicines or sticking to their routines. Courtesy of Lively hide caption

itoggle caption Courtesy of Lively

Manic, sad, up, down. Your voice may reveal mood shifts. iStockphoto hide caption

itoggle caption iStockphoto

After a tornado leveled Moore, Okla., last year, firefighter Shonn Neidel (left) developed an app that helps first responders locate storm shelters under the wreckage. Courtesy of Shonn Neidel hide caption

itoggle caption Courtesy of Shonn Neidel

With tablet technology still relatively new, pediatricians are trying to understand how interactive media affects children. iStockphoto hide caption

itoggle caption iStockphoto

Matchmaking apps like Tinder can help people find potential dates quickly. Tinder hide caption

itoggle caption Tinder

He's not checking your blood glucose levels. He's playing Words with Friends. Anna Zielinska/iStockphoto.com hide caption

itoggle caption Anna Zielinska/iStockphoto.com