While college educators have long recognized the intensely social quality of campus life, many faculty and administrators have watched student culture become even more social in recent years as various interactive technologies, including online social networks, have emerged. Starting before students arrive on campus and continuing into their days as alumni, online social networking has become routine behavior for many college students on American campuses. As online social networking has spread, numerous questions have emerged about its implications for today's college students. Perhaps the most important one is, How significantly does it affect their learning? In this article, the author provides an overview of how online social networks have become immense virtual communities comprising innumerable subcommunities, which students join more easily and in which they sometimes interact more frequently than at the physical campuses that they inhabit. He concludes by offering a list of suggestions on how faculty, staff, and administrators can develop approaches and strategies to help students use their networking behavior to enhance their learning and development. (Contains 8 notes.)