I know that in modern, Muggle, American schools (or maybe it was just my particular modern, American Muggle school) that the school makes every effort to place students who are the children, siblings etc. of teachers in a different class. (For example, my friend's mother taught eighth grade math the year we were in seventh grade and then returned to teaching seventh after we had gone.)
As this isn't possible at Hogwarts, I am looking for personal stories and experiences (or even just ideas you made up) about what sort of conflicts/issues would arise if your older brother were your teacher <i>and</i> head of House, since my character can't really be placed in a different section etc.
I would also like input on what sorts of disasters I can put him through as a first year teacher/head of house. Anyone with personal experience is more than welcome to share, even if your experience was with something as disparate as Muggle kindergarten. :)
(Obviously, this isn't really an HP-specific question as I can co-opt basicaly any situation for use in my story, I just wanted people to know we weren't dealing with a RL school system here.)