In this lesson, students analyze primary source documents in an effort to answer the central historical question: Why was the 18th Amendment adopted? Students first read the text of the amendment and answer brief guiding questions. Then, the teacher streams a video clip from Discovery Education about the temperance movement. Students then analyze, in small groups, 4 documents: 1) a statement by the National Temperance Council, 2) a New York Times article, 3) a propaganda poster, “Alcohol and Degeneracy,” and 4) another such poster, “Children in Misery.” For each, they answer detailed guiding questions. A final class discussion evaluates the strategies of temperance advocates: are their arguments convincing?