Situating ourselves in the study of identity -- Situating the study of identity in the evolution of student development theories -- Multiple social identities and intersecting identities -- Model of multiple dimensions of identity -- Reconceptualized model of multiple dimensions of identity -- Critical theoretical frameworks and multiple identities -- Intersectionality -- Critical race theory, with Stephen John Quaye -- Queer theory, with David Kasch -- Educational applications and future directions -- Application of the models in educational contexts -- Future directions: considering theoretical perspectives in conjunction with one another -- Final interludes.