Excluding a child from a class (by making her stand outside the door) means she misses part of the lesson. There’s also a strong possibility that asking a girl to “stand outside the door” will be met with her asking to you to [perform a physical impossibility]*. How would you deal with that? How, indeed, would you deal with a girl who: truanted; smoked; engaged in “inappropriate behaviour” with a boy; persistently went out of bounds; or fired off what are now called IEDs on school premises? I was caned for all those things apart from the last (I was never caught doing that. )