Prep for success on the CLEP Principles of Macroeconomics exam with REAs personalized three-step plan: (1) focus your study, (2) review with the book, and (3) measure your test-readiness. Book + Online prep gives you all the tools you need to make the most of your study time: Diagnostic exam: Pinpoint what you already know and what you need to study.Targeted subject review: Learn what you'll be tested on. Two full-length practice exams: Zero in on the topics that give you trouble now so you'll be confident and prepared on test day. Glossary of key terms: Round out your prep with must-know vocabulary.