im not there as yet in terms of age but i can tell at least two things even at the age my daughter is now, she has a heck of a temper. also i have heard that even with athletes and adults taking steriods and prednisone that anger for sum reason gets amped.  at her age and being my first i fel at a loss sometimes. however like a prior poster said,  i let her go cool off, but it surprises me too when i see the strength in her anger. its sed to be frustration, which lets me ask....do we need to further work with them on expressing themselves?