Rudey, you have agreed with me in all of those previous posts, so don't play innocent. You are also completely mischaracterizing my job search, which in any event is an irrelevant comparision to a college part time job scenario.
Back to I_Love_Penguins, in college, there are a lot of opportunities for different jobs. Sometimes it's easy to get comfortable in something because you know it. You have enough going on in your life, that dealing with headaches in a job that's not going to do a lot for you personally (unless you are planning to go into restaurant/hotel management) isn't worth it. Check your student newspaper or school's online job site. If there's a department that you're interested in, see if you can work there. Work in admissions, student activites, etc. Or if you really like the food biz, try to work at a local restaurant. At least then you'll make tips!
For now, with three weeks to go, there's not necessarily a whole lot you can do. You can ride it out and try to ignore her (which granted, isn't easy- particularly when you're the one who has to do her work). You can talk to the manager about the coworker. There may be limits as to what she can do, since she's under 18 and not allowed to operate certain machinery and do certain jobs. But you're in all likelihood just stuck
