I recently spotted that my son's school had very poor SAT results last year (50% pass rate in maths and writing compared to 70%ish national average) and have been asking him more about his schoolwork. He says he's good at maths, and gets '0/1/2/3' wrong on 25-30 question tests. But when I asked him if they have ability tables or if some students do different work, he said no - they all do Qs from the textbook and everyone is told as a class to do the B column, middle difficulty, Qs. There is apparently no differentiation in the work they do whether for easier work or harder. The girl in his class who is apparently 'really really' good at maths has a private tutor come to her house but still does the B column questions.
I'm going to try and stretch him and do some more learning at home myself, but I wonder if this is uncommon and also potentially an indicator that he isn't receiving a particularly good education? We've mostly been thinking about it recently because looking at a high school with an entrance exam and suddenly worrying that if our state primary has low standards then it might be a challenge for him even if he is doing well in his current class.