Particularly in the 1960s and 1970s it was frequently argued that coeducational (Coed) high schools provided a more natural social environment to prepare adolescents for adulthood than did single sex (SS) schools. Based on the assumed accuracy of this belief, SS schools are becoming infrequent or even nonexistent in most western societies. This…

The effects of single-sex versus coeducational arrangements were compared for 2,332 Catholic high school students representing 21 single-sex boys', 26 single-sex girls', and 33 coeducational schools. Various outcomes during the sophomore-to-senior period were nearly unaffected by school type. These findings contradict those of earlier national…

Critical reanalysis of a previous Australian study comparing the effects of single-sex mathematics and mixed-sex mathematics instruction on students in grades seven and eight suggests that the randomly assigned class-type intervention had relatively little effect on mathematics achievement or attitudes, and that at least some effects favored…