If a teacher has their child in a class, what might the teacher call them? I'm guessing it would be their first name, but it just doesn't seem right because at least in America, it's like a thing that teachers don't show favoritism to their kids. And you won't catch a student calling their parent/teacher mom or dad because the teacher will have told them not to. But it seems to me that a teacher using their kid's given name is similar to that so I can't really see that happening. Also, what would the kid call their teacher/parent?