A new study from the UNESCO shows up the importance of sports in education. It focuses on the role played by women in this topic.
As the study says, "the masculine values of over-competitiveness and aggression override alternative, more universal values such as fair play and co-operation. Physical education programmes are typically short and offer few opportunities to progress children’s learning and develop other educational benefits such as personal and social skills. Such programmes, it is argued, cater only for a minority of already sport-competent children, the majority of whom are typically boys, and offer little more than confirmation of incompetence and failure for the majority. Given the wide range of educational and other outcomes often claimed for physical education, it is argued here that traditional programmes take a “one size fits all” approach and in so doing fail to achieve any of these outcomes (Metzler, 2005). This traditional approach has been subjected to a sustained critique by scholars worldwide and is frequently viewed as a sexist form of physical education (Kirk, 2003; Flintoff and Scraton, 2001; Williams and Bedward, 2001)".
We can conclude, the single-sex education helps on this field by separating boys and girls' on sports to promote girls participation.