The average cost of yearly tuition at a private, four-year college in the US this year was $25,143, and for public schools, students could

Going back to school requires a lot of time, energy, money and dedication. Before you start applying, you’ll need to make absolutely sure that your graduate degree is in the right field. One of the best ways to do that is to experiment with the courses you’d be taking when you enroll in school. With these open education resources, you can take all the classes you want — not for credit, of course — without paying a dime.

Schools

Excerpt from wikiHow:

1. Plan ahead. If you have a study hall, do as much of it there as possible. The more you do when you are in class, the less you will have to do at home. Try to do it in class if time is provided and at lunch, or any other spare time you might have.