Proponents of coeducation argue that gender-biased structures, contents and methods create a gender-stereotypical environment. Any segregation sends a message of inferiority, which results in the perpetuation of stereotypes. Proponents of coeducation believe that much of the boys' crisis, the belief that boys are far behind girls in achievement, is based on gender stereotypes or faulty notions of sex/gender distinctions that can dangerously be seen as true and own biological differences (Cable and Spradlin 6). “If researchers say that girls are better than boys in verbal skills but are behind in math, and vice versa, then students will believe it. . . There is concern that stereotypes will be treated as actual biological differences, which would have negative consequences, particularly regarding students' confidence, motivation, and classroom engagement” (Cable and Spradlin 8). Single-sex education maintains and can even exacerbate sexist attitudes and gender