The essence of a girls' school is a high school or a university, learning textbook knowledge like an ordinary school. Schools that only recruit women and implement single-sex education are mostly high schools or universities. Before the middle of the twentieth century, single sex education was the mainstream, and most middle schools and universities were all boys' or girls' schools. Many cultures (such as religious reasons) advocate one-sex education, which is practiced in many parts of the world.

Development history:

Before the 9th century, single-sex education was very common. /kloc-in the 0 th and 7 th centuries, society allowed women to start receiving education, but it was limited to the Bible and needle and thread. In the19th century, schools still divide students by sex, and boys and girls enter through different gates and move in different areas. With the popularization of education, more and more coeducational schools have been established.

19 17, the Soviet union stipulated that all schools must be co-educational. According to Cornelius Riordan, "By the end of 19, most public primary and secondary schools in the United States have been transformed into coeducational schools.

At the end of the 20th century, coeducational schools have been popularized all over the world. Finally, by 2003, only a few countries in the world had boys' schools, and girls' schools accounted for more than 2% of all schools.

However, there are still countries and regions where the ratio of boys' schools to girls' schools exceeds 10%: Belgium, Chile, Singapore, England, Hong Kong, Israel, New Zealand, Australia, South Korea and most Muslim countries.

In the long-term practice, people gradually found that male students and female students have their own advantages in several fields. This discovery supports the theory of one-sex education, and the interest in public and private one-sex education in modern society is rising again.