College Level Examination Program (CLEP) exams are a great way to reduce the amount of time it takes to complete a college education. They allow you to test-out on subjects in which you have sufficient knowledge as outlined by the College Level Examination Board. I have personally taken many of the CLEP tests and I can tell you that 2 weeks before taking the exam, I didn’t know anything about the subject matter. Prior knowledge on the subject is not necessary if you use the right tools.