Contemplating doing Kumon maths with ds (just 6, Y2), as his maths is a bit erratic, and I'm concerned that he hasn't really understood how numbers work, even though he can get the right answers some of the time. Ds is one of the youngest in his year and although his reading is fantastic (reading proper books independently) his maths is nowhere near the same level. I don't want to be a pushy parent about it, but I know dh had to retake his maths O-level four times, and I don't want that to happen to ds if possible.
Any experiences of Kumon? Is it worth it or not? There are a few kids in his class who do it, but they are in the very top group, and I wondered whether there might be some competetiveness about who's on which level. Or else that it might be off-puttingly boring.
TIA