The first reason is communicating communication skills.

Schools are the is a place to gain important habits or and skills that are essential for their lives.

Studying together makes gives them more opportunities to communicate with each other while they have less time to communicate in a separate school.

The second reason is that they are able to learn from each other at school since girls and boys naturally may have different talents, attitudes or habits naturally.

Boys mostly pay more attention to a the bigger picture and less to smaller things details while girls are careful to about everything.

The next reason is that girls and boys who go to a same school may easier get accustomed easier to social life than those who do not.

Should boys and girls go to a separate schools? The general case so we use the plural.

Should boys and girls go to a separate schools?

I consider that Boys and girls should go to same school for somea number of reasons. Also consider rephrasing this sentence as follows: There are a number of reasons why boys and girls should go to the same school. It is unnecessary to write 'I consider that', and in academic writing use of the passive voice (simply, no 'I' or 'my') is preferred.

Schools areis the place to gain important habits or skills that are essential for their lives. I must disagree with the other corrections here and say that 'the' is correct in this sentence.

The most important skill they may learn at a school is communicating with other people.

Learning it this may help boys to avoid even small mistakes.'This' is better here because you are referring to an idea in your previous sentence.

The next reason is that girls and boys who go to athe same school may easier get accustomed to social life more easily than those who do not.

As human beings are is the most advanced social, living organism on the earth, everyone has own needs to be involved in a society where youthey need to communicate with different kinds of people.

Girls in a mixed school are able to communicate with not only girls but also boys, so do and vice versa for boys.

That could make them to be better prepared to for social life.

The last reason is that they could make better marriages in the future.

Men and women have different ways of thinking and understanding the world. 'Thinking' is an intransitive verb so it doesn't need an object but 'understanding' is transitive and needs a direct object.

These differences could cause misunderstandings or worse problems for married people.

By being aware of them and learning to communicate with people of the opposite sex person, they could solve or prevent the problems that could arise in daily life.

Considering these reasons, there are some advantages to go to a same school for girls and boys.