Listening to a particularly noisy lesson coming from the practice room next door, my student asked why the rooms didn't have better soundproofing...
ME: When they build a school, they take bids to see who can pretty much
build the school as inexpensively as possible without the building
ME: Which means they forgot a few things, like putting a water fountain in the Fine Arts wing.
KID: The Fine Arts wing? Where's that?
ME: We're in it.