In 1993, American University professors Myra Sadker and David Sadker published their research in Failing in Fairness: How America's Schools Cheat Girls, which highlighted the major differences in how teachers treated students in the classroom. Among these were teachers who praised boys over girls, giving more attention to the male gender than to the female gender. So by separating the sexes, there is less discrimination and more focus on teaching same-sex students. Without boys in their classrooms, girls are more likely to be leaders and achieve higher levels of achievement, which leads to greater self-confidence and higher career aspirations. And without girls in class, boys are less distracted by academic work and get higher grades in single-sex environments. In a Washington Parent post, an argument in support of single-sex education states: “Single-sex education encourages children to take risks in expressing themselves as they learn without the fear of embarrassing themselves in front of the opposite sex ”. Being exposed to the opposite sex can be quite uncomfortable and even humiliating for some students, especially if there is a possibility that your child might turn out to be one.