A study compared the 1975 and 1983 editions of the "Macmillan Reading Program Series" primary readers in order to examine sex role portrayals. It was hypothesized that the 1983 edition would show an increase in portrayals of non-sexist roles when compared with the 1975 edition. A checklist was constructed to record instances of sexism found in the 18 first, second, and third grade textbooks that were examined. Each story was read individually and analyzed according to the checklist. Results indicated that, although there was an increase in non-sexist role portrayals in the 1983 edition over the 1975 edition, the increase was not significant, and the hypothesis was barely supported. (Tables of data are included, and references, a section on related research, and several figures are appended.) (NKA)