Hands down one of the best resources when studying for a CLEP test is Free Clep Prep. This website provides study guides for almost all of the CLEP tests offered and ranks them in difficulty. While some tests may be more difficult for some and easier for others, I think it gives students a good jumping off point. It may make sense to have the first CLEP test you take be considered easier so that you do not get scared away from the whole process. Then again it just matters on the person, personally I thought the Information Systems CLEP was easy because of my experience with computers, but I realize where that would be a difficult test for many people.
When you find your exam study guide, you will notice how the details of the exam are listed, an exam breakdown, and areas of study. The wonderful part of this website is that it is a one stop shop! They provide many details of the exam and provide you with possible study resources that are FREE! The website is a truly incredible resource and they dig much more in depth about the exams. I hope to spread the word about accelerating your degree and I highly recommend using Free Clep Prep!