Bankrate.com recently listed the cheapest and most expensive private colleges out there. The gap between the two is amazing. With private colleges, the tuition difference is a 7-to-1 ratio. Clark thought the most expensive college was either Boston College or Boston University. But actually the most expensive college is Sarah Lawrence. The tuition alone is $32,000 a year. The second most expensive school is Kenyon College in Ohio, followed by Trinity College in Hartford, Conn., and George Washington University in D.C. At the other end, rates are $4,600 a year to about $10,000 year. But the interesting part is that there are several public colleges that are more expensive than the cheapest private schools. So, private schools are not always going to be out of your range.