Single-sex schools are schools that only admit those of one specific gender, believing that the educational environment fostered by a single gender is more conducive to learning than a co-educational school. Studies conducted have shown that boys gain more academically from studying in co-education schools, but that girls find segregated schools more conducive to achievement. However academic results are not the only criterion on which the success of the education system should be judged. In the United States, a long-standing controversy over the Virginia Military Institute resulted in a landmark Supreme Court ruling, in June 1996, that the institute must admit women. Nevertheless the Court left room for private (i.e. not state-run) single-sex institutions and other such schools, where needed, to redress discrimination. Proponents of single-sex schools maintain that, by removing the distractions of the other sex, students learn more effectively and feel better about their education. Opponents maintain that co-educational schools in contrast are important in that they prepare students better for the real world, and do not attempt to segregate students from the realities of adult life. This debate can apply both to secondary school and college level, but single-sex institutions are found more frequently at the former.