When I was a child, attending a small Catholic state primary in North Wales, our times tables were something that were drummed in to us. Teachers, and my mum, who was a single parent, knew the value of being good with numbers and being able to do your "sums". And the key to it all is practise. You can't do it without practise. But somehow we think that you can confine maths to five sessions of 45 minutes or so a week (the numeracy lesson) and that's good enough. It isn't.