[A'elian' nation]

And what is this ‘maths’ instruction ?

So would you say The maths curriculum is all screwed up or
The maths curriculum are all screwed up ?

Not to mention: 2 + 2 IS 4 or 2 + 2 ARE 4

Game On! my friend across the pond.
Shudder the thought that any nationalistic imperialism is going on. lol

[Caulkhead]

I’d say ‘The maths curriculum is ineffective’ as both ‘maths’ and ‘mathematics’ are not the plural of anything just as ‘physics’ is not the plural of ‘physic’.

‘Two plus two is four’ once again because although the words two and four represent numbers higher than one, they are not plural.

One cannot define absolutely one version of English to be more authentic than another, but English written the English way by the English people who invented the English language in England has a reasonably good call on being the original! :)