Letting him use a calculator is just going to give school the impression that he can do it when he can’t.
I don't see why this would be the case? He wouldn't be taking the book into school, the teachers will never see that he's working through it at home.
I had X tables tapes, books, videos, huge posters and despite working my little arse off endlessly I never could remember them, yes, this is where we're at!
If you gave him five numbers, could he remember them?
I'll try this out. Do you mean like say 25, 10, 8, 17, 4 and then ask him to write them down. Immediately? Or after a minute?
but surely the better option is that people can do some mental arithmetic at least?
Well yes, I agree. And life would also be easier for him if he didn't have any SN, but I can't actually change that.
Using a calculator is counterproductive at this age as he needs to understand the methods of calculation so that he can answer word problems I think you can understand a word problem and know what calculation you need to do without actually doing the calculation though.
The best thing you can do with him is help him to learn his times tables by rote, not just as a string of numbers but as ‘one times seven is seven, two times seven is fourteen’ and so on, in conjunction with concrete and visual materials. Boring, but once they’re in there they can be recalled. Or you can do all this for a few years and they still can't be recalled. We are way beyond the stage of cooperation in reciting tables. You cannot force someone to speak if they refuse.
This is mad. Bar charts aren’t ‘more advanced’ than times tables, they’re just a different area of maths.
Yes, I think so too. Which was why I was thinking of buying the book and working through it with him so he covers the ideas and different areas that the rest of the class are covering, but without the stress of actually having to do the addition etc by himself. I think this kind of maths will crop up in his other subjects soon and then he'll be at a disadvantage in those because he hasn't covered the topics the rest of the class has as he is still on times tables etc.