My son very fierce to my helper. He can throw things to her when she try to stop him. He is p2 now. His grandma most of the time around but occasionally he will be taking care by my helper. What should I work?

Check where is the throwing and anger comi g from. Ask his teachers and all. Some kids do what they see from others. Or maybe they do it to him and he does it at home. But of course when you see him throwing stuff, you must discipline him and talk to him. Hope your helper is fine and just talk to your child.