Maybe you could do a community service class at your school. Junior year I did that and I had to pick where I wanted to work (I was 15). I want to be a doctor, so I went to my orthopedic, and asked him if I could do some community service work for him. He agreed, and for a semester, everyday, I'd work for 1 hour during school, typing, faxing, etc. at his office. Once my semester was over, he offered me a part time job starting at $12 an hour!
Check out if they have a communtiy service program at your school where you can find your own job. It was a blast! Good luck!