Single-sex schools vs coeducational

There is no one answer to this question; there are staunch defenders and outspoken critics of both systems. Many experts believe that single-sex education is obsolete while others regard it as an essential step towards equality of the sexes. 

But while this dispute rumbles on, it is universally accepted that boys and girls develop at different rates and have different interests and motivations. Not surprisingly there are many who believe that a curriculum and teaching style devised specifically for one sex is more likely to produce favourable results than a system which needs to cater to both sexes. But this is just one factor when considering which is better for your child. Grace Moody-Stuart, director of The Good Schools Guide Education Consultants, advises parents ‘always to consider your child’s individual character, likes and dislikes and family situation. Logistically, can parents manage having their son and daughter at different schools? Might girls with multiple male siblings prefer an all-female school setting? Some parents with only boys may specifically choose mixed schools so their sons learn to work alongside and co-operate with girls – they’ll have to in the real world, after all!’. The message loud and clear is that one option is not uniformly better than the other. 

Advocates of single-sex girls’ education talk about a nurturing, less boisterous environment that’s more likely to lead to girls choosing subjects such as science, technology, engineering and maths (STEM) when compared to girls at coed schools.

And there is research to back this up. Analysis by the Girls’ Schools Association in 2025 of data published by the Department for Education between 2023 and 2025 revealed that when compared to peers at coed schools, pupils at girls’ schools were 2.9 times more likely to take further maths A level and 2.3 times more likely to take physics. They were also more likely to take A levels in other STEM subjects. The same research reported higher levels of academic attainment at all-girls schools compared with coed schools. 

A separate study from AQR International – an organisation which provides psychometric evaluation – looked at attributes relating to ‘mental toughness’ in school children. Its findings indicated that pupils educated at all-girls schools possess ‘higher mental toughness scores…particularly for emotional control and confidence’. 

Among other research looking at the advantages of all-girls school it has also been concluded that girls are more likely to take part in sport and exercise in a single-sex environment and go on to earn more during their careers. 

It may feel like a fundamental part of the British make-up – King Charles III at Gordonstoun, Churchill at Harrow…even James Bond got expelled from Eton – but single-sex boys’ education does not elicit the same passionate defence applied to girls’ schools. A steady trickle of boys’ schools, state and private, have become coed in recent decades (examples include Charterhouse, Abingdon School and Bishop Wordsworth’s Grammar – the latter just in the sixth form) and there are now only three all-boys full boarding schools left in the country. 

However, there are studies that suggest boys do better academically in single-sex schools. In fact, the same study cited above, in which the GSA demonstrated the stronger A level performance of girls in girls’ schools, shows that boys in boys’ schools likewise do better than their coed peers. Although, elsewhere an in-depth analysis of GCSE performance data by education data blog School Dash, suggests that the difference between single-sex and coed educated boys is negligible.

Another study in 2016 which looked at data from the PISA study, actually found that boys aged 15 performed better at reading when sharing classes with girls. This tallies with the general perception that the presence of girls helps boys do better at school. 

Experts at FFT Education Datalabs argue that boys at all-boys schools may get better results but not because they are at all-boys schools. They attribute this difference in performance to other factors, namely that these schools are more likely to be academically selective, in London (where academic levels tend to be higher) and have lower than average levels of deprivation and SEND.

While there may be not be reams of academic data-derived evidence to support single-sex boys’ education, its defenders are adamant that modern all-boys schools provide the ideal environment for boys to learn, develop and engage with their interests. 

Preparing children for the real world

There are people who claim that single-sex education in the 21st century is no longer fit for purpose; a good school prepares children for the real world and the real world is populated by both sexes. But the consensus on single-sex education waxes and wanes. 

Social development and wellbeing

In the past, segregation of boys and girls was absolute but these days single-sex schools maintain links with schools of the opposite sex and join forces for extracurricular activities or even niche academic subjects. Single-sex boarding schools hold ‘socials’ with such schools to ensure the opposite sex does not resemble an alien life form. Despite these modern-day concessions, many still argue that single-sex schools create an unhealthy environment that leads to bullying, poor mental health and not being prepared for the workplace. 

Parents want the best school for their child. There are studies to support the practice of single-sex education, particularly with girls, but that does not make it right for everyone. ‘What it comes down to in the end is whether the school is a good school and whether it’s right for your child,’ affirms Grace Moody-Stuart. ‘As the world becomes more complex, schools do too. Gender is part of this complexity and so creating a wholly single-sex environment is becoming increasingly challenging. My advice for parents is to focus on the simple things. Is the school well run, with strong pastoral care and inspirational teaching? If you get that right everything else will follow.’