This resource was developed to help teachers and students use the vast online collections of the Library of Congress. The links [...] lead you to sets of selected primary sources on a variety of topics in United States History. The sets are arranged by chronological period. The primary source excerpts were chosen because they deal with important and interesting topics in U.S. history. Each excerpt is linked to the complete primary source in American Memory from which is has been drawn. The excerpts are thus also intended to help students and teachers delve more deeply into the primary sources provided online by the Library of Congress.