CLEP® is the most popular credit-by-examination program in the country, accepted by more than 2,900 colleges and universities. For over 15 years, REA has helped students pass the CLEP® exam and earn college credit while reducing their tuition costs. Our CLEP® test preps are perfect for adults returning to college (or attending for the first time), military service members, high-school graduates looking to earn college credit, or home-schooled students with knowledge that can translate into college credit. There are many different ways to prepare for the CLEP® exam. What's best for you depends on how much time you have to study and how comfortable you are with the subject matter. Our test prep for CLEP® History of the United States I and the free online tools that come with it, will allow you to create a personalized CLEP® study plan that can be customized to fit you: your schedule, your learning style, and your current level of knowledge of American History.