Precious Knowledge is a 2011 political documentary centered on the banning of the Mexican American Studies Program in the Tucson Unified School District of Arizona. It was directed by Ari Palos and produced by Eren Isabel McGinnis. The film follows the lives of four students and several teachers in the Mexican American Studies program at Tucson High School. It follows the progression of local legislature put into place by the Arizona Department of Education Superintendent of Public Instruction Tom Horne in order to ban the Mexican American Studies programs in the Tucson Unified School District.
The film was awarded the Premio Mesquite for Best Documentary at the Cine Festival at the Guadalupe Cultural Art Center in San Antonio, Texas.