On most of the practice tests I've taken, Petersons dose not come close to reflecting the level of difficulty of the actual CLEP tests. Petersons are much harder. I took three of the Petersons practice exams on business law and finished with scores of 48, 39 and 52. I took the actual CLEP Intro to Bus Law test today and finished with a score of 67. Thanks again Instantcert for another 3 credits.