I'm paying a lot of money for this class, only to have to correct the prof.

Have you checked to see if you can test out of the class? Most colleges/universities waive required classes if the student can demonstrate that they know the subject matter.

Failing that, is it taught by any other professors? It is likely that another professor may be more familiar with the course material than your current professor. It may be too late this time but researching the professor is an important part of choosing which classes you will take and when. You might have considered approaching the professor prior to taking the class as you already have a working knowledge of Perl.

In the unlikely circumstance that you actually had to take this class with this professor even though you already know the information being presented, my suggestions are similar to those already presented. Build a relationship with the professor. Help him don't humiliate him. Breeze through the class with a good grade. It'll be good for the GPA.

Many people get their degrees without much of an education at all. You seem to want one and that's laudable. The reality is, however, that you aren't really paying for an education; you are paying for the degree. You'll have to work for the education. Keeping that in mind will help you deal with these kinds of frustrations which you are unfortunately bound to run into again and again in your academic career.

-sauoq
"My two cents aren't worth a dime.";