Research in the 1970s and 80s found that reading scheme portrayed women mainly as housewives and mothers, that physics books showed them as frightened by science, and that maths books depicted boys are more inventive. Weiner (1995) argues that since the 1980s, teachers have challenged such stereotypes. Also, in general, sexist imaged have been removed from learning materials. This may have helped to raise girls' achievement by presenting them with more positive images of what women can do.