Hi everyone. I have just discovered the CLEP and have a few questions.

Are the tests very difficult?
How long should I give myself to prepare?
If you fail can you retake the test?
I have found study guides on the college board website. Are these adequate or should I get other sources as well?
I am open to any other advice anyone can offer.

1 more...are there 2 biology test? My college accepts the CLEP for BIO 1 and Bio 2.

Thanks for all of your help.

Matt