Most of these same-gender schools are boarding houses; this means that your children grow up basically in this setting. If you are stern parent who is a disciplinarian, your children may display a different behavior when they are at home with you.
This makes it very difficult for you to correct them when they are still young. They pick up dirty habits there and you may not be able to curb them. Discussing certain things with them may be weird except you find a way of making them blend with the environment at home.
Children these days are intuitive, they tend to take in their environment and read your expressions before they give you answers.
5. It is not the societal way
When you send your children to same-gender schools, you are protecting them from the environment in a weird way. We should note that being in that school is just a phase in their lives. They will get out of it and be clueless when it comes to issues that have to do with the opposite gender.
Many of them form the range of students who misbehave in their first year in the universities because they have just tasted freedom. It is a delightful experience for them and they want to explore. At that stage is it really possible to keep the opposite gender in a different class?