The class began with a Mayan-inspired chant and a vigorous round of coordinated hand clapping. The classroom walls featured protest signs, including one that said “United Together in La Lucha!”–the struggle. Although open to any student at Tucson High Magnet School, nearly all of those attending Curtis Acosta’s Latino literature class on a recent morning were Mexican-American. For all of that and more, Mr. Acosta’s class and others in the Tucson Unified School District’s Mexican-American program have been declared illegal by the State of Arizona — even while similar programs for black, Asian and American Indian students have been left untouched, reports the New York Times…