Ray - I just took this exam. I mainly used the Peterson's practice test (look for another thread I started for newbies where Snazz has listed a site allowing you to take the very same practice tests for free.), the CLEP Success book (also a link to get to it free online) and the CLEP practice test to study. I did quite well on it. Since it's a pass/fail you only need a 50. Oh, and the online CLEP book has some of the major points of each topic summarized. It also has 4 practice tests (2 pre and 2 post).
This should at least get you to the point where you feel comfortable with the subject matter.

Good Luck!!

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Best of luck,
Joanne

31 hours traditional schooling
11 Microsoft exams, 1 Linux+, 2 ICCP's, 6 CLEP's, 12 DSSTs, and 6 ECE's

Degree Completed!
BS in Liberal Studies