19.  Massachusetts Institute of Technology (MIT)

MIT is one of the most selective schools in the country, but 72 percent of undergraduates graduate debt-free. The annual price of attendance is $65,612, but only 16 percent of undergraduates pay it. Families earning $30,000 or less pay an average of $7,432, and those earning $30,001 to $48,000 pay $4,727.