National Humanities CenterThe National Humanities Center is the only independent institute in the nation devoted to advanced studies in the humanities. Of particular interest is the tab Toolbox Library, subtitled Primary Resources in US History and Literature. Assembled here is a wealth of carefully selected digital resources aimed at classroom use. At present 11 toolboxes appear (with a promise of more to come), each arranged chronologically and thematically. The first, American Beginnings: The European Presence in North America, 1492-1690, is divided into the themes Exploration, Settlement, Permanence, and Power.