19/04/2015 23:01 BST | Updated 19/06/2015 10:12 BST

When Did Parents Start Treating The School Office As A Customer Complaints Department?

Closeup portrait of angry young woman, student, worker accusing, pointing at you with index finger, isolated orange, red background. Negative human emotion, facial expression, feeling symbol, attitude

This month, new research revealed that a staggering 40Slideshow-219733%