Nationalism, progressivism, federalism. Any student in a social studies class has come across these terms, but what, exactly, do these terms mean, and how do they relate to the history of the United States? Key Concepts in American History is a dynamic new set focusing on the major themes in U.S. history. With engaging, A-to-Z entries connecting the important figures, events, and issues of each concept, the volumes provide in-depth explanations of the "-isms" that have defined American history. Each three-part title contains an overview essay of the particular concept, alphabetical entries pertaining to the title issue, and a "Viewpoints" section showcasing pertinent primary source documents. Based on national educational standards, these easy-to-read encyclopedias also feature unique sidebars, a chronology, and detailed primary sources, making them ideal for middle and high school classrooms.