My kids (DD9 & DS7) both went through it. DS would get mad at the other kids in his grade 1 class because they "played chess wrong" (he was the only one who knew how - he learned at the end of KG), and DD went through a MASSIVE bragging phase. Try as I might I could not seem to explain to them what "tact" was. It got to the point where I tried avoiding social situations, lol.
They outgrew most of it. (Thank heavens!!) Sometimes they still get worked up: "let ME!! I can show you!!!" or "mommy I was just trying to show him/her how but he/she won't listen!!" (sigh). DD9 is finally at the point where she understands that sometimes other kids need to try themselves to learn. Overall they're both much better and much more polite.
