Most of us have vivid memories of at least one fearsome teacher.
But even though many can be scary when they want to be, they also have the good humour to point out when they’ve messed up.
Bored Panda has compiled some of the funniest teacher fails from English-speaking countries across the world.
They include a teacher’s pet dog who ate their entire class’s assignments and a children’s word search which mistakenly included an expletive.
Here FEMAIL brings you a selection of the best ahead of ‘back to school’ month in September.