...which is a worthwhile endeavor if you want to learn the fundamentals of programming language design, or are interested in Functional Programming. Dr. Scheme was also developed by the guys at Rice and is a great environment for learning the language.

That said, it's kind of the long way around learning object oriented programming. Scheme is a derivative of lisp and is very flexible. It can support [link|http://www.angelfire.com/tx4/cus/shapes/scheme.html|OO polymorphism] but it's not one of the better OOP languages - CLOS, Smalltalk, or Eiffel are better candidates. Anyhow, the Scheme stuff is fantastic if you've got time to delve into the intricacies of the profession. If your just trying to get a handle on OOP, though, it's kind of a long road.