"Calisphere is the University of California's free public gateway to a world of primary sources. More than 200,000 digitized items — including photographs, documents, newspaper pages, political cartoons, works of art, diaries, transcribed oral histories, advertising, and other unique cultural artifacts — reveal the diverse history and culture of California and its role in national and world history.

A variety of primary sources have been collected into sets that support the California Content Standards in History-Social Sciences, English-Language Arts, and Visual Arts for use in K-12 classrooms. These collections of primary sources make it easy for teachers to find the materials they need quickly. "