The purpose of this paper is to offer a feasible way to show that the problem of large EFL courses for lower division can be solved by the use of high level upperclass undergraduates as teaching assistants in and out of class. The use of UTAs fragments the large class into seemingly small classes with view to stimulating interest and effective learning outcomes in large classes. The paper discusses how to apply UTAs in large EFL classes from the aspects of selecting, training, and using UTAs. It also makes an objective appraisal of the use of UTAs in a large class.