By Danielle GoodmanPrivate colleges are known for being more expensive than their public counterparts, but higher cost doesn’t necessarily mean a better education. Public colleges offer a better return on investment than private colleges, and a recent report suggests that gap will grow even wider. (Return on investment is calculated by subtracting the cost of attending school from the earnings of college graduates.) College is one of the most expensive purchases you’ll make. Use our College Match to find schools that will give you the most for your money.