In fall 2022, the Johns Hopkins Institute for Education Policy (the Institute) and UnidosUS, the largest Latino civil rights organization in the country, designed a project to better understand the representation of Latinos in U.S. History textbooks for high school. Recent years have brought increased awareness that students learn best when they see themselves reflected in curricular materials and classroom instruction. Learning about the experiences and contributions of diverse groups of people has pronounced benefits for all students, as well. This project constitutes a first step in learning about the extent, quality, and variety of classroom content that reflects the contributions and experiences of the Latino community, and required: (1) the determination of ten seminal content areas, developed by UnidosUS and the organization's network of professors and specialists; (2) the design of a rubric for review, based on the Institute's Knowledge Map™ quality measures and further calibrated to the UnidosUS content; and (3) the selection of textbooks for review based on demographic criteria and available data. This research analyzed the presence, depth, tone, and authenticity of the seminal Latino topics in five high school U.S. History textbooks and one AP U.S. History book, all of which are commonly used in seven states. The results of the study can be used to inform efforts to support changes to existing curricula, reframe how the Latino-American contribution to the United States is taught in K-12 schools, and inspire an understanding of the unique role Latinos play in U.S. History. [Additional funding provided by Kemper, Molson Coors Beverage Company Molson Coors, and PNC Bank.]