The field of the psychology of women has its roots in the functionalist movement of studies of sex differences. There was no separate field of study known as the psychology of women during this movement. Women were discussed solely in relation to men, discussed in terms of “innate” differences between the sexes. Thus, sex was used as the explanation rather than the starting point for scientific inquiry. The heritage of the field of the psychology of women, beginning with the functionalist movement, is reviewed in this chapter. Changes in the field are identified: women as problem and the variability hypothesis, female–male differences and similarities, and feminist studies of women’s experiences. This chapter also addresses internationalizing the psychology of women. Contributions by first- and second-generation American women psychologists are also discussed. In addition, feminist pedagogy in psychology of women courses is presented, with special attention to stages of feminist identity development, shared teaching, classroom seating, grading, and empowering students in their professional and personal lives.