My BA (got it 7 years before I started nursing school
) was accelerated by 20 CLEP credits, the max my college would allow for the BA in business management. The CLEP I had trouble with and did not pass, was Analyzing and Interpreting Literature. There was a lot of British stuff in it. For nurses with A&P background, the Natural Science CLEP should be one you try if it will count for you. There were 120 questions, my school required 90 correct, and I got 115. I also passed the Spanish one but it was really hard as it contained a component where I had to listen to a recording and then answer questions. Comprehending the spoken Spanish was very hard for me. If your school will accept the English Composition CLEP's, try them as they were very easy for me, no preparation, mostly just thinking about how professional people are supposed to talk. The algebra one wasn't too bad. There was also one about civics and government that counted as a history requirement. If you know about the way this country is supposed to work (not saying it does) you will do fine on that one.
My husband would tell you that CLEP's are not pushed by colleges because of the very thing c.wicks noted--income to the college would be decreased. My husband would also tell you that the "college police" have applied a lot of pressure to the CLEP/DANTE organizations to control the amount of advertising they do, for the very same reason. I don't know if he is right as frequently I would apply the word paranoia to his position on things, but why else would people not be lining up in droves to take these tests?
One thing of note-I don't think any of the financial aid programs pay for the CLEP/DANTE tests. Those people would have to pay the testing fees as opposed to just taking the class where the tuition fees/books are covered.
I looked back to see how much the CLEP fee was when I took the tests-$35, as opposed to $200/hour for tuition at that time. The 20 hours I got from CLEP cost $245 as opposed to the $4000 tuition would have cost me.