I'd say talk to your high school counselor about getting yourself into a post-secondary program with a local college. A post-secondary program is where you take college classes in your junior or senior year and then apply them to your high-school degree requirements as well as future college-level requirements. Usually your high-school will pay for the classes. I did this with my math classes, I took some upper level night-time calc classes my senior year so it only really saved me $700 or so, but my brother and one of his friends did the post-sec thing both of their junior and senior years, saved thousands of $$, the friend graduated a year early, and my brother will be graduating with a MechE Master's degree this spring at age 22.