A very basic android game (no ads or purchases inside it) with about 400 downloads per day, 15k current installs. I know there's not much monetization potential but it could drive steady traffic somewhere. You could totally redo it and get some automatic ranking in the store. I would use the money to pay for college which is coming up in about 18 months.
I actually started something strikingly similar to this idea, techwurk.org. I plan on adding a job board as a feature. I'm a high school student, so I'm also wondering if anyone on HN knows any qualified people (preferably students) that would want to do basic tech work for charities. Thanks!
Just to demonstrate the answer to your question: I'm currently a junior in HS and am going through the process of learning about colleges. Last week, our guidance counselors gave us pamphlets. They were blatantly telling us to pursue liberal arts degrees (such as art or music) even with low job prospects. They were reassuring us that we should follow our passions no matter what. Lots of kids saw right through the promises of success and threw out the pamphlets right away. They really try and convince you that a four year university is the only option.
(I go to a very affluent, competitive HS. I think that the counselors want to maintain their college placement rates even if it means sending kids to college if they are failing high school classes. The system is completely broken or just plain ignorant, but that's just my opinion.)