My son will be starting kindergarten in just about 3 weeks and he is going through a rough phase... he argues about everything!!!  He also just throws a hissy fit if he doesn't get what he wants.  Normally he is well behaved... like a normal child, no problems in pre-school, etc... but lately he is out of control.  He has yelled at my husband and I, hit us when we discipline him and just refuses to do what we ask.  Please help!!