Hi Mrsshears.
I've been lurking on this thread because we've been through this identical situation with ds... to a point.
Ds identified as A&T at his nursery. Also showing various signs of high ability at home. We took him to see Peter a year ago when ds was 4yr5mo. Sure enough, his IQ was 148 - the numeracy element was in the 160s. Suspicions confirmed. We bought lots of extra books at his ability level, more challenging toys, puzzles, lots of maths-based stuff etc
That's where the similarities between our circumstances end. Because the last thing I wanted to do was go up to ds's school and present Peter's report. I felt that ds' ability would stand out and I trusted them to recognise and do what they felt necessary. I did not believe that presenting them with a report would be of any benefit. Ds' abilities are blatently obvious and I knew the teachers would find out for themselves (why wouldn't they?)
Lo and behold, 3 weeks into Year 1, ds comes home with differentiated maths work, he's already given whatever books he wants to read and he's also given harder spellings. At our recent parents evening, his teacher said 'He's A&T at maths and his reading is exceptional etc etc'
So, our relationship with the teachers is maintained, ds is happy and we can stretch him at home if we feel it's necessary.
I have to be honest and say that some of the recommendations on here are ridiculous and will only go to alienate the teachers/ school even more. Marching up there with NAGC literature is not going to make any difference and will do more harm than good - guaranteed. Teachers are professionals and nothing will get their backs up more than being patronised. Your child presenting abilities over and beyond their peers in a classroom context is what will make a difference to the school/ teacher's outlook.
You probably won't want to hear this, but if I was in your position, I'd put the report away in a cupboard and try your best to get things back on track in terms of your relationship with the teachers at the school. Leave your dc there.