They do. I found some in my classroom which I remember using in the 90s. Thought I'd use them for a change - nostalgia and all that. The difference was, I used the year 6 'extension' textbook for my lower ability year 5s! The expectation is so much higher. So while the maths is the same, who needs to learn it is not. This is the first school I've been at where decent maths textbooks (not the ones mentioned above!) have been available. It's so much easier than the constant internet searching for the right sheet!