Teachers are more sensitive to the need of avoiding gender stereotyping. GIST (Girls into science and technology) and WISE (Women into science and engineering) - encourage girls to pursue careers in these non-traditional areas. Female scientists have visited schools acting as role models. Weiner and Boaler see the impact of equal opportunity policies as a key reason for the changes in girls' achievement. Many of the barriers have been removed and schooling has become more meritocratic, so that girls, who generally work harder achieve more.