May 27th 2013, 14:44 by W.W. | HOUSTON
LECTURE halls can seat only so many students, but it's easy enough to broadcast lectures online to tens of thousands. Ventures such as EdX, a non-profit consortium involving a dozen universities, and Coursera, a for-profit business, are now focused on making courses taught by outstanding instructors available to millions of students. Some universities are using these so-called MOOCs, short for "massively open online courses", to supplement their standard curriculum, and the possibility that these offerings may in time replace flesh and blood university professors has become a source of distress among academics.
Read article at Online college courses: Outsourcing education | The Economist