Chairman Mao teaching a group of women (and one older peasant) in Yan'an, in front of the Women's Literacy Classroom (婦女識字班 in traditional characters). On the table and held by several women is a Culture Textbook (文化課本). The wooden 'blackboard' says Lesson 3 - Use Marxist-Leninist theory to arm our minds (第三課 - 用馬列主義的理論來武裝我們的頭腦).