"During the late 1910s and early '20s, immigrant workers at the Ford automotive plant in Dearborn, Michigan, were given free, compulsory "Americanization" classes. In addition to English lessons, there were lectures on work habits, personal hygiene, and table manners. The first sentence they memorized was "I am a good American." During their graduation ceremony they gathered next to a gigantic wooden pot, which their teachers stirred with ten-foot ladles. The students walked through a door into the pot, wearing traditional costumes from their countries of origin and singing songs in their native languages. A few minutes later, the door in the pot opened, and the students walked out again, wearing suits and ties, waving American flags, and singing "The Star-Spangled Banner."