3门课还算PART TIME, 不过如果你注册4门或者4门以上的话算FULL TIME。一般是mid term之前drop都可以refund。钱你可以选择留着做为冬季学费的credit,或者去finance office(好像是叫这个名字)要支票,如果没记错的话应该在Robertson Hall 2楼。
Last day to withdraw from fall term and fall/winter courses with a full fee adjustment.
In addition to the refund, if you are an international student (with Student Authorization/Visa), you might also need to consider its conditions - the visa may require you to register for minimum courses. Forget this if this is not the case for you.