Freire's Pedagogy of the Oppressed, and Bill Bigelow's Rethinking Columbus: The Next 500 Years. Supporters of MAS see HB 2281 as another attack on the Hispanic population of Arizona. This is due partly to the fact that none of the other three ethnic studies programs were cut. Support for the ethnic studies programs subsequently came from scholars, community activist groups, etc. For example, The Curriculum Audit of the Mexican American Studies Department refuted all of the violations under House Bill 2281. The audit instead recommended that the courses be implemented further, given the positive impacts of the courses on the students. In addition to the defense of the ethnic studies department, the UN Charter of Human Rights challenges the bill as a violation of fundamental human, constitutional, and educational rights (Kunnie 2010). A 2011 documentary, Precious Knowledge directed by Ari Palos and produced by Eren McGinnis for Dos Vatos Productions, argues that while 48% of Hispanic students drop out, TUSD's program had become a model of national success, with 93% of enrolled students graduating and 85% going on to college. The film shows a 165-mile community run from Tucson to Phoenix in protest of the state's decision, as well as student-led marches and stand-ins. In one instance, students overtook a board meeting by chaining themselves to the board members' chairs. A student protest group, UNIDOS (United Non-Discriminatory Individuals Demanding Our Studies), has remained active speaking out before legislators and school board members on behalf of the program. In a separate case, two students and 11 teachers sued the state, contending that the law is unconstitutional. The teachers, however, have been denied standing in the lawsuit as public employees. Appeal of Arizona ban The Mexican American Studies course was first brought under attack after the Deputy Superintendent of Public Education gave a speech to students, countering an allegation that "Republicans hate Latinos." The students walked out of the speech, and Tom Horne, the Superintendent, blamed the rudeness of the students on the teachers from their Mexican American Studies courses. He called for removal of the courses. When his call was not answered, he made an effort for a bill to be put into law banning Mexican American Studies courses. House Bill 2281, which prohibited the Mexican American Studies courses, was approved in December 2010. In an effort to enforce the bill, the district court gave the Superintendent of the school district