When girls go to the society they are scared to talk in front of the boys. The same when boys go to the society they are scared to talk in front of girls. But if they had co-ed it will never happen because in co-ed both girls and boys work together and they are not scared to talk in front of anyone
I believe that in order for an individual to get the true experience of school, one needs to experience relationships and hardships with the opposite sex. They help the development and growth of each sex. Having a girlfriend or boyfriend in school is a great way to experience relationships and structure in life.
According to a poll done by an education specialist, Margaret Spellings, boys do better on tests with the influence of girls and their study methods. 84% of boys in the grades of 6-12 do better in class with the influence of girls. 76% of boys in the grades K-5 do better in class with the influence of girls. Therefore Single sex schools are not good or grade performances will go down.