I have only a couple of minutes left, and I'd like to use them to talk about how graduate school is somewhat different from undergraduate school. Of course, it's much more difficult to enter graduate school, and most students are highly qualified and highly motivated. Students in graduate school are expected to do much more independent work than those in undergraduate school, with regularly scheduled exams, etc. Some classes will be conducted as seminars. In a seminar class, there may be no exams, but students are expected to read rather widely on topics and be prepared for thorough discussion of them in class.