A friend's son is 8, and I'm a little concerned by his difficulties with maths. It seems to me he's struggling with fairly basic concepts around the number line. We're not in the UK, he's swapped school systems a couple of times, and I'm wondering if something's got lost along the way, or if he has dyscalculia. Any guidance as to what general level of maths he ought to have by British standards would be much appreciated!