A recent NPR story examines the growing popularity of online courses in the United States.

"When today's college graduates get together for a reunion someday, they may decide to do it by computer. That's because right now, nearly one in five college students takes at least one class online, according to a new survey.

For professors, the growth of e-learning has meant a big shift in the way they deal with students."

Listen in to learn more about how online courses have changed the way teachers instruct and students learn.