What is the ruling on the mixing of men and women in schools?

Question:
The questioner says: I am a person who has sisters studying in a co-educational school, and I am the one who takes them there. What is the ruling of the Shari'ah in this matter? Knowing that if I leave them without taking them, they will go in taxis, and the mixing there is more severe. What is obligatory for me to do in this situation?

Answer:
This is a trial and a test, and there is no power and no strength except by Allah, and these are the trials (fitan). No one is safe from these trials except the one whom Allah the Mighty and Majestic keeps safe.
So this mixing in education is a calamity and a trial, and it is wrong (munkar) and not permissible; it is forbidden (haram) because it leads to the corruption of morals. So it is obligatory that the authorities, the authorities of the Muslims, make the education of women separate from the education of men. They make special schools for the girls and special schools for the boys, as is the practice, praise be to Allah, in this country, may Allah guide it and keep it firm upon the truth. It has established an independent body for the education of women and independent buildings, and it has made an independent area for teaching the males and an independent place for them, with no mixing, praise be to Allah. And much good has resulted; learning has taken place for both males and females. Is there any necessity for learning through mixing? Is mixing a necessity?
It is possible to separate the two sexes from each other. And if it is not possible to make the education of women independent, then at least they make a section for the women behind the male students, and they put a screen (hijab) between them. And today, loudspeakers and television broadcasting perform the task and convey the lesson to everyone. So matters are made easy, but many people do not want the good; they want to mix the males with the females, intending this thing for the sake of trial (fitnah), and I seek refuge in Allah. But whoever is afflicted with this thing, let him fear Allah. The study that involves mixing is not necessary; it is not necessary. If the girl does not learn, it is better for her than that she learn mixed with men. If learning takes place without mixing, praise be to Allah, and only what is necessary has been achieved. Teach her the matters of prayer. Teach her surahs from the Qur'an. Teach her the conditions of prayer, the pillars of prayer, and the obligations of prayer. Teach her the rulings of wudu' (ablution). It is not necessary that she go to study with the males.
So it is obligatory upon the Muslims to fear Allah the Exalted and Majestic regarding their daughters. And if there is no study except with mixing, they should prevent their daughters; they should prevent their daughters and teach them the necessary things for their religious matters and their worldly matters as well. And this is possible and facilitated. Yes. May Allah reward you.