Any of you coach youth basketball teams? I've coached my son's teams in the past, but they were usually 10 and under. At that age, we just taught a 2-3 zone defense and focused on stopping the ball and positioning for rebounds. My son is now in the 12-13 age group and the kids are much bigger, faster, and more coordinated. Do I keep it simple with a 2-3 zone, or do I try teaching them something else?