All students who regularly attend your class should be registered for credit or audit, or be registered as a Continual Learning student. If a student is registered under Continual Learning, no record is kept of their attending class. They may participate in the class, but nothing appears on a transcript. If a student is registered as an auditor, the course appears on the student's transcript; thus you should request Withdrawal for any auditor who does not regularly attend class. An auditor is officially someone who attends class but does not participate (and thus does not take the instructor's time away from students registered for credit.) This rules out auditing a technique class.
Prospective students are allowed to watch class and to take class, if appropriate; they should introduce themselves to the instructor. (Ask if they do not.) Other individuals may request to visit classes on occasion. If you teach a class in which visitors are never or almost never appropriate, please notify the Department Office and all full-time faculty; that way we can avoid suggesting it to prospective students and other visitors.
The instructor’s priority must always be the students enrolled in a course for credit. Students enrolled for credit justifiably get angry when there are auditors or visitors who make the classroom too crowded or take the instructor’s attention.