The Gilder Lehrman Institute of American History is the premier national resource for professional development and classroom support in the subject of American history. We align content to the Common Core, embracing an interdisciplinary approach that emphasizes literacy skills, history content knowledge, and improved student achievement. With nearly twenty years of experience across 37 states and 160 districts in designing customized K-12 professional development, the Institute is adept at providing programs and workshops featuring primary source documents that benefit districts and teachers, according to their individual needs.