I'm putting this on the teenager board as I want to ask the mums of girls who are a bit older. I have done the average of my height & her fathers height less 7cm because she's a girl and that comes out at about 164. Could she really grow 12cm in only a year (I think girls stop growing after 13). That hardly sounds possible. She got her period a couple of months before she turned 12).
By the way, I'm not putting pressure on her to be taller than I am! I think she will be surprised if she's not.
Everything I can see on line says the big growth spurt is between 11 & 12. And yes she has grown a lot in the last year.