One year ago, my son was 5'7".
I've been 5'9" since 8th grade, and the first person I became friends with when I moved to Utah (at age 14) was Howard Gurney. When we met, he was at least an inch shorter than me, and when he played at BYU, he was 6'8".
So I'm proud to say that I've been a pretty amazing teacher, because my son is now 6'3" (in 10th grade, and still growing). Are you really trying to say that my teachings have had nothing to do with this? That's crazy talk, I tell ya.