Different genders weren't segregated in either school I went to. It would have seemed unnatural, weird. That stated PT was segregated. And in primary school playground the two tended to stay apart, the boys liking rough & tumble type games, marbles, and conkers, the girls skipping, jumping over elastic band chains, and showing their knickers to the boys by doing handstands against the wall. Secondary school, the boys played football, no idea where the girls were hiding.