Marine Sgt. Maj. Robert Breeden, at Camp Leatherneck in Afghanistan on June 12, 2009. Breeden is now home from Afghanistan and trying to stay busy. David Gilkey/NPR hide caption

Janis Ruoff, an assistant research professor of special education at The George Washington University, uses a blackboard in her classroom. Many colleges and universities have turned to learning management systems to help teachers disseminate information electronically. Courtesy of William Atkins/The George Washington University hide caption

The Los Angeles Dodgers take on the Chicago White Sox at the Dodgers' springtime home, The Ballpark at Camelback Ranch in Glendale, Ariz., earlier this month. Chris McGrath/Getty Images hide caption

In this courtroom drawing, David Coleman Headley faces U.S. District Court Judge Harry Leinenweber on March 18 in Chicago. Headley pleaded guilty to using his Western appearance as a cover while scoping out sites for the deadly 2008 Mumbai siege and plotting to kill a Danish cartoonist. Carol Renaud/AFP/Getty Images hide caption

Scientists altered people's perceptions of right and wrong by applying magnetic stimulation to the brain. The study is part of a larger effort by scientists to explain the mechanics of how the brain makes moral judgments. iStockphoto.com hide caption

In general, researchers have found that kids understand the need for some rules, particularly safety rules like not hitting other children. But when it comes to parents dictating what a child should wear or who they should play with, many kids resist. iStockphoto.com hide caption

Motorcycles are the primary form of transportation in Vietnam, and public health officials are raising the alarm about a new road hazard: texting while driving. Here, a man checks his cell phone while driving in downtown Hanoi, Vietnam, in January. Jeff Holt/Bloomberg via Getty Images hide caption