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

itoggle caption Courtesy of William Atkins/The George Washington University

The Facebook culinary staff hustles to prepare 1,300 lunches per day, more than some restaurants serve over the course of a week. The cafe also serves about 600 breakfasts and 580 dinners each day. Rori Gallagher for NPR hide caption

itoggle caption Rori Gallagher for NPR

In April 2008, Qiao Ming picks out 2007 tax forms at the Illinois Department of Revenue in Springfield. Some people prefer to do their own taxes, while others take comfort in using a professional. Seth Perlman/AP hide caption

itoggle caption Seth Perlman/AP