The University of California Libraries has digitized a collection of images of four ethnic groups in California that have been historically underrepresented by digitized primary source materials. In order to learn about diversity in California in a historical context, visitors should start by checking out the Historical Essays highlighted at the top of the site's homepage. These essays provide brief historical overviews and related images and begin with the period "Before 1768: Pre-Columbian California" and end with the period "1921-Present: Modern California". Once visitors have familiarized themselves with the history they should move on to the main event. The images of the four groups, "African Americans", "Asian Americans", "Hispanic Americans", and "Native Americans" can be found under their own tabs at the top of the page, and are further divided into subcategories. On the far right side of the page are several free Lesson Plans for grades 4-12 that emphasize these underrepresented California cultures, and utilize this database of images and documents. Some of the lessons include "Stealing Home: How Race Relations, Politics and Baseball Transformed Chavez Ravine" and "Los Californios: California's Spanish, Native American and African Heritage".