A record 21.6 million students attended American colleges and universities in the fall of 2012. Of those students, the U.S. Census Bureau says, more than 4.4 million were in the 15-19 age bracket, the market primed and ready for the advice dispensed by college consultants. The experts at Entrepreneur zero in on this growing marketing and show education enthusiasts how to turn their passion into profits with a college planning and consultant business.