When you think about minimum-wage workers, college professors don't readily come to mind. But many say that's what they are these days.
Of all college instructors, 76 percent, or over 1 million, teach part time because institutions save a lot of money when they replace full-time, tenured faculty with itinerant teachers, better known as adjuncts.
Kathleen Gallagher, a published poet and writer with advanced studies and a master's degree, spent 20 years as an adjunct English professor at several colleges in Akron, Ohio. The most she's ever made in a year is $21,000; last year, she made $17,000.
After one college laid her off last summer, Gallagher was desperately short of money, so she sold her plasma.