Attending a single-sex school can be extremely beneficial for some pupils, it has been suggested.
Dr Helen Wright, president of the Girls' Schools Association (GSA), said evidence indicates that boys and girls often benefit from being taught separately.
"Research conducted amongst teachers of English in comprehensive schools, for example, found that most teachers acknowledged greater levels of participation in lessons, and increased confidence amongst both sexes, when they were taught separately," she commented.
Dr Wright added that this is "no surprise", as the pressures, fears and anxieties about how to behave with the opposite sex do not exist at single-sex schools.
A report presented at a conference of the International Boys' Schools Coalition in London earlier this year concluded that male pupils are more likely to take part in dance and artistic activities at single-sex schools because they do not feel the pressure to conform to masculine stereotypes in front of their female classmates.