Most schools in the USA are single-sex schools, which means that boys or girls are not mixed, I’m not in favour of this policy.
In my opinion single-sex schools are bad for several reasons. Firstly, you don’t relate to people of the opposite sex and it so also interesting to know their opinions, because in most cases they are very different from hours. Secondly, If studying in a single-sex school, can be just boring because when teenagers start high school they love the relationships with everyone. Finally, all the people like meeting friends of the opposite sex and in single-sex schools, this is not possible.
So all in all, I think that it isn’t a good thing to go to study in a single-sex school, and for that reason I think there should be less single-sex schools in the USA.