Only 5.2 percent of students say they didn’t spend any time on social networking sites such as Facebook during their senior year in high school, down from 13.7 percent in 2007, when the survey first started this measure. But not as many students are perpetually glued to such sites as one might imagine. Just over 53 percent said they spent three or more hours a week on social networking sites as seniors in high school, up from nearly 42 percent in 2007.

Tim Post/AP/File
A computer shows a LinkedIn graphic at a social media workshop last May at the University of Minnesota in Minneapolis, Minn. From LinkedIn to Facebook, both college applicants and admissions counselors are increasingly turning to the web when dealing with college applications.