Having the opportunity to sit in on a class is such a great first hand experience that you can share with your student. By sitting in a class or two you will be able to provide a real experience that your student will benefit from. The benefit to the student is the accurace of information that you provide to them so in addition to sitting in on the class it would also be extremely benefial to speak with the instructor to gain additional insight on the expection of not only one class but the entire degree and what the student experience will look and feel like.