Op I've heard from teachers with the actual teachers degree that education is now mostly full of teachers with pgce.
But if I was a school head, I would invite in people who know this stuff. There are many people who do consultations on various strageties and things to look out for.
Surely, like our head, they would want to help dc at the bottom of the class?
Bright children who do not reach their potential and have their self esteem damaged can go onto to cause society a lot of issues.
I'm in the process of formulating a letter to my MP about this issue. I've found myself in an Orwellian black hole at this school, littered with bizzare socialist ramblings.
The SENCO is literally a Co ordinator and has not even seen or observed or knows anything about my dd. The teachers are defensive and reluctant to tell dp what their dc is actually struggling with. They don't believe in dyslexia. 
I'm writing to the mp about my experience and how literally without an outsiders kind help my dd could be still locked out of learning when, with only a teeny tweak she's actually capable of top marks.
And not one teacher has mentioned anything to me in 3 or 4 years.
How can the school therefore, recommend her to be seen by an Ed psych, if they can't in any way gage she might have an issue.
So if she does have an sen, who on earth is supposed to spot it in an learning environment if not one teacher, ta or SENCO are trained to spot anything and the head isn't interested?
How is she supposed to get the help she may need? What if she needed an EHCP?
It's a bizzare situation.
I've got some very scant knowledge, only picked up since all this blew up for us, last October. However my very scant knowledge would go a very long way in my dd school!! It would unlock many other struggling dc, and help them to learn and get the help they need.
Even when, back in October, and my dd grades went up, I was trying to explain this simple thing to the teacher, she wasn't interested at all.
You would think for their own marks, they would like to know how a child 3 years at the bottom started to climb out?