<p>Just an overall comment for the prefrosh: even though a course may be closed, students often discover that openings do often materialize at the beginning of the semester, as some students do drop out after shopping. If a student really wants to take a particular course that’s closed, it is always a possibility to 1) start attending the class and see whether you can get in and/or 2) contact the professor and express a strong desire to enroll in the course. I know quite a few cases in which this has worked.</p>