I'd advise to go to degree forum. This site is great! It is all about the different kinds of Cleps and Dantes tests. The people on the website tell you what test they took and what study materials they used that worked best for them. I hope this helps.
Oregon State is a major research university, part of the Oregon University system, long a leader in distance education.
OSU offers online Bachelor’s Degrees in Liberal Studies, Political Science, Environmental Sciences, Fisheries and Wildlife, General Agriculture, and Natural Resources; Master’s Degrees in Education, and Science & Mathematics Education; and Graduate Certificates in Fisheries Management.
The school is a reputable, widely-recognized academic institution in the U.S.
I failed Macro yesterday, scored at 43. I'm surprised I did that well. Not an easy exam. I will definitely put a lot of time into studying for Micro. I wouldn't recommend taing Macro with out a fair amount of Prep.