What does it mean when someone says a person has the school uniform advantage? A couple of explanations come to mind.
The first one is that it refers to the student having an easier time at school if he's required to wear the same clothing as everyone else at his school. In this respect, when all are the same, a child is less apt to be singled out for ridicule by the rest of his peers - as it levels the playing field, so to speak. And, this explanation would be correct.


