It's not really allowed, it's about the situation when the class ends, all the kids already left but one of them wants to talk. This is still possible when the

It's not really allowed, it's about the situation when the class ends, all the kids already left but one of them wants to talk. This is still possible when the others are packing up their things, but once everyone else has left, he feels uncomfortable even though the door is wide open and asks the kid to step outside. Younger kids simply don't understand why and of course you can't tell them except "these are school rules."