Learning more about one another is part of what binds us, which may be the reason why the websites we are most drawn to tend to know the most about us.
To be sure, more than 6 million students in the U.S. are now taking at least one course online, and 65 percent of higher education institutions say online learning is a critical part of their long-term strategy, according to a 2011 report from the Babson Survey Research Group .