Online Geography study materials?

I've been studying for the Social Sciences and History CLEP exam for some time now. In fact, chances are I have overstudied for it, but I'm determined to pass this general subject exam on the first try. I have managed to find most of my study materials for free online. This leads me to my question.

I'm currently studying for the geography portion of the exam. I just need a general overview of the subject, as geography is only about ten percent of the exam. Does anyone know of a good online resource to do some reading on the subject, perhaps an online textbook of some kind? Thanks.

 

Here are some powerpoint materials that might interest you. They are used in an introductory geography class. http://www.clas.ufl.edu/users/risajook/