Grappling is kind of a side-bar. It isn't something we heavily train on (well, us instructors do) but more of something different for the kids once in a while. We don't want them to freeze the first time they are taken to the ground in a headlock, so we prepare them for that. Now, for the instructors, we grapple pretty often. Usually, our sparring will degrade to that during black belt class. Quick foot sweep and then the grappling really begins. We go to submission.