This guide presents a model developed to assist schools and districts in planning and implementing multicultural and nonsexist education in all subject areas from kindergarten to twelfth grade. The guide illustrates how multicultural/nonsexist curricula may be integrated into social studies, mathematics, language arts, and science, and emphasizes that the model is applicable in other subject areas as well. Four sequential activities for curriculum development are proposed: deciding on a rationale; selecting goals and outcomes; assessing content; and developing appropriate activities. Activities are described and materials and worksheets for each of the four subject areas represented are provided. A bibliography is appended. (Author/MJL)