If only common sense could be applied, we would recognise that children develop at different rates, and in some areas, the areas that the government measures, girls are on average quicker to develop. So the fuck what? Why can't these wankers leave the children alone to develop in their own good time?
I find it hard to understand why parents allow their children to be taken from them and fed into the monstrous meat-grinder of the state school system. Children learn next to nothing worthwhile at school, especially if they're bright.