Classtime Internet use research

Even top students can be distracted by Internet browsing during class, according to a  study that finds that students who spent the most time surfing the Internet during class had the lowest exam scores. That includes visiting social media sites, such as Facebook, online shopping, playing games and more.
Ragan, E. et al. (2014). Unregulated use of laptops over time in large lecture classes.  Computers & Education, 87, 78-86. 
http://www.sciencedirect.com/science/journal/03601315