This is a study guide for Chapter 18 (The Progressive Era) and Chapter 19 (World War I) in Eric Foner's Give Me Liberty! AP® 5th Edition (W.W. Norton & Company, 2017). This is an original and fairly exhaustive study guide that contains sections for "Most Important Terms," "Other Terms," an essential question for each chapter, and additional critical thinking questions. Students are asked to describe the significance of terms rather than simply providing glossary definitions. While this is a very extensive study guide, it does not necessarily include all terms from the chapter, but rather is selective given the experience of a veteran APUSH® teacher. That said, the study guide can be edited to fit your needs.