Arizona’s superintendent of schools has ordered Tucson public schools to cancel a popular ethnic studies program or face the loss of $15 million in funding. Schools chief, John Huppenthal, says the Ethnic and Mexican American Studies violates a new state law barring programs “designed primarily for pupils of a particular ethnic group” or that “promote resentment toward a race or class of people.” Republicans have criticized the program, which allows students to learn how ethnic groups have influenced history. Huppenthal has ordered the Tucson school district to prove it is complying with the law within 60 days.