I've already been in to see her twice this year (apart from parents evenings)regarding his reading and writing and have always been fobbed off.
But this weekend, when DH asked DS to finish reading to the end of the chapter and they both nearly ended up in tears, I thought something has to be done.
DS starts off reading really well, but becomes very tired, very quickly. I think this is because he is exhausted from the sheer effort it has taken his to read one or two pages.
His writing is very, very slow. It's as if he can't get the information from his brain, down his arm and on to paper. His teacher last year understood this, his teacher this year seems to think he is slow because he wants his writing to be perfect.(He has good fine motor skills, so his writing is very neat)
He scored 5 on the Bangor test, carried out by a friend of the family, but when I showed the report to his teacher she wouldn't even look at it.
He doesn't reverse letters. This is why his teacher thinks he is definitely not dyslexic.
I recently bought some coloured reading rulers, and the blue one seems to really help. I will mention this to his teacher, but suspect she will think it a load of bunkum.
He got a 2c last year in the SATs (I was pleasantly surprised he didn't get the 1a he was predicted at the parents evening a couple of months before), but he now hasn't met his targets.
If he answers a comprehension question verbally,(after having the text read to him) he gives text book answers, but if he has to write the answer he will try to get away with a couple of words.
After the last meeting with his teacher, she was going to raise my concerns with the SEN teacher in school, who happens to be my DS1's Y6 class teacher from last year. DS1 is bright, and this teacher seemed to think he was stunningly bright. I suspect the school think I have too high expectations of DS2, after having a bright DS1. I know DS2 will never be "academic" like DS1, but I don't think he should be exhausted so quickly after reading/writing a short amount either. I think his exhaustion is due to a processing difficulty. When I mentioned this to his teacher she thought I was talking about autism. DS2 is the least autistic person on the planet. 
I have an average DD in Y1, and while her reading and writing leave a lot to be desired, I don't worry about her, as she is able concentrate on reading and writing for as long as she wants to, without the sheer exhaustion DS2 experiences.
I would have a private dyslexic assessment if I could afford it, and am saving up, but I'm
about telling the school I can't afford it. And if I could would the school take any notice of it?
I don't think a formal diagnoses, even through the school would change the way he is taught? Would it?
Sorry this is so long, and I'm grateful for any comments.