Ah teachers. Throughout most of our childhood, they were the very bane of our existence. Remember the total, head-scratching absurdity of having to ask for permission to go to the toilet?
As we've matured and realised that they were just regular people with irregular holidays, we've reminisced over the advice they offered our way. Sadly, nothing was of any use so we've taken solace in the world of film, yet again.
Here are 40 of the best/worst/weirdest pieces of advice from movie teachers.
(Images: All Star, Rex Features, YouTube)