I couldn't give a tinker's cuss how fat my kid's teachers are, just so long as they can teach.
But that aside, I do agree with cassa - heaven forbid if you refer to somebody as fat nowadays, you will be accused of the flavour of the month phrase of 'body shaming', which is nonsense phrase that I find particularly annoying.
I wonder how long it will be before fat people are protected by an amendment to the Equality Act!
Until fat people stop portraying themselves as victims and take some responsibility for themselves, as far as I'm concerned they have nobody to blame but themselves (yes, yawn, some people are fat due to a medical condition - but these unfortunate people are very much in the minority).
Some fat people may say they are happy with their size, but this is a front and they are not. Nobody would rather be fat than slim - they may say they are, but they probably cry themselves to sleep every night.