<p>Professor’s typically collect the tests at the end of class so nobody takes a copy. Exams change every semester, because Professor’s know if the exams stayed the same, people would cheat. There are things called test banks- when Professor’s give copies to the students to keep and the students save them (greeks have test banks). Quizes float around, but you don’t buy them. We have study binders, and people include any quizes/test that were handed back.</p>