This publication contains lesson plans and classroom activities to assist K-12 teachers develop sex equity themes. It supplements the "Sex Equity Resource Directory" (SO 013 579) which is a guide to sex equity resources available through the District of Columbia Public Schools. The "Ideabook" has several major sections each containing materials suitable for duplication. Section one contains awareness activities for use with colleagues, parents, and community members. "Title IX's Believe It or Not" posters, brief quizzes, and information sheets are included. Section two on social studies/history contains brief biographies of famous American women and games to play with the information. Section three on mathematics provides background information on why girls need mathematics and three sets of exercises--a "Discussion About Families" (elementary); activities on percentage and calculations (intermediate); and exercises on graph reading and interpretation (secondary). The fourth section on science contains lists of women Nobel Prize winners and members of the National Academy of Science for use in class discussions or as resources for student research. The next section contains teacher developed lesson plans in a broad range of subjects for grades K-9. Section six contains a play written by a junior high school student to dispel outmoded myths about girls and boys. (Author/RM)