When registering you will find that they have the courses you need, they do have them frequently and have more than 2 or 3 time slots in one day. If you are put on a waiting list I have found you usually make it in the class before the add/drop time is up. The registrar office staff they will call you when one of the slots open up or send you the information in the mail. Calling the registrar's office once a week or so helps you get in quicker.
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