I've got to say, check out thedamian's book: Object Oriented Perl. It is amazing. One of the best Perl books I've seen. It will help you with clarifying several concepts in your page. Packages and Namespaces, the meanings of the words object, method, and class. It really helped me a lot, and a coworker who was struggling with complex datastructures and refs suddenly had an epiphany when she saw the excellent data structure diagrams. She is now happily writing OO code. I bet there is a review in the Reviews section.

I also recommend Sun's OO tutorial info on their learning java site. I found the link: Object-Oriented Programming Concepts. An excellent document. And it's free.

Good luck with the course. I hope this helps.

TGI says moo