It's little more than a decade since Mark Zuckerberg dropped out of Harvard at the age of 19 to launch Facebook. The social network has made him the fourth-richest man in America and a hero to any aspiring college entrepreneur. Of course Zuckerberg was already something of a prodigy when he started his global empire. But for those with more modest abilities, there are now thousands of schools across the country offering courses in entrepreneurship.
