Auditing a course is a process of observing and evaluating the quality of a course. It involves sitting in on the class and taking notes on the instructor's teaching style, the course content, and the overall atmosphere of the classroom. Observing is the first step in the auditing process, which involves watching the class and taking notes on the instructor's teaching style and the course content. Sitting in is the second step, which involves actually attending the class and participating in the discussion. Sitting in on the class allows the auditor to gain a better understanding of the course material and the instructor's teaching style. Finally, sitting in on the class also allows the auditor to gain a better understanding of the overall atmosphere of the classroom.