Hi, I hope this doesn't sound a silly question.
The thing is, ds1 has always been fairly keen on school, from the beginning, but the last few weeks he has been saying he finds it too hard with the homework and the tests and everything. He's coming to the end of year 3.
He's a bright boy, IQ apparently 140+ but questionably dyslexic - when we had him assessed, that's when the IQ thing was mentioned (didn't know they tested for that!) but they weren't sure if he was dyslexic or just immature.
So we don't have any sort of diagnosis, however he has always had trouble processing information and will often forget instructions, not absorb them to start with, that kind of thing.
Recently his teacher found a load of spelling sheets in his book bag, which he'd been supposed to practice every week, but when I've asked him if he has spellings to do he always says no, he knows them. He doesn't, it would seem! Though he is always scrupulous and keen about doing other homework tasks which is why I trusted him, when he said he didn't need to do them.
The teacher confronted him and apparently he burst into tears and said his head was too full of other things, there was too much in his head. He told me later that he is worried about lots of things like making sure his brother is OK (I do ask him sometimes to keep an eye, when they are playing, or to make sure he doesn't hurt him - normal, I thought/ They are 7 and 3), I never leave them alone and go out or anything, I'm always here.
I think he just finds it all too much remembering the work, he's always forgetting his kit, his clothes, he's a sort of half-puppy type of boy iykwim 
Yesterday they broke up for Easter and he said he can't stand school any more and wants to leave. I don't really know what to do - I'm not one to force the issue, but I do wonder if more should be being done.
Not having a formal dx is difficult though, what can I ask them to do for him?
Obviously expectations are higher in yr3 and will get higher still. Any advice much appreciated, thankyou.