Our CLEP study guides are different! The United States History I CLEP study guide TEACHES you what you need to know to pass the CLEP test. This study guide is more than just pages of sample test questions. Our easy to understand study guide will TEACH you the information. We’ve condensed what you need to know into a manageable book – one that will leave you completely prepared to tackle the test. This study guide includes sample test questions that will test your knowledge AND teach you new material. Anyone can take and pass a CLEP test. What are you waiting for?