These days, when you apply for a job or a course of study, you are usually required to fill in a form about your ethnicity, age, nationality and disability status. Find as many of these types of forms as you can. What terms are used for indicating a persons identity? What categories are included? From the categories and labels and language used, is it possible to tell what is considered ‘normal’ or unmarked? What does this indicate about this society? Are the forms for different purposes the same? Are there identities that aren’t represented? A local careers office or job centre or national census survey would be a good place to find some.