subject: How to study for a CLEP while taking courses [print this page] Remember that a CLEP test is not designed to be easy, and that it would be wise to study for at least a month before taking a CLEP exam. It may also be a good idea to get CLEP study materials and/or CLEP at-home/preparation tests. If these materials are unavailable, consider using a mini CLEP knowledge to make your own test CLEP exam.