According to a 2015 Gallup survey, 73% of parents with children under the age of 18 worry about paying for college more than any other financial issue. And those worries are only increasing. From 1985 to 2015, inflation-adjusted wages essentially remained flat, while the cost of attending a public, four-year university more than tripled.

So how can the average, middle-class family afford to send their children to college? It isn’t easy; however, there are a number of ways to reduce the hig...