I originally was going to use the Microeconics and Macroeconomics Saylor classes to help CLEP the course. Finding the Proctor U to be extremely convienent I decided to give it a try. I found Instant Certification Flash Cards at $20 for CLEP a month to be extremely helpful for Saylor exams. The flash cards allow you to turn a 15 minutes work break into quality study time. I have passed both Saylor direct classes.