9 year olds still throwing tantrums--how do you deal with it?

when you said she has tantrums about 3 times a day I say she is spoiled and being popular at school makes her even worse. When she try's to beat you and your sister you must take control by gabbing her and forcing her down on something soft like a bed and say as calm as you can that you will not tolerate this and be as sweet as possible to her. If she try's kicking you and all after you do this then just walk away with your other sister and stay away from the one with the tantrum. This way she will calm down eventually. And if she gets mad about the food taking to long then finish that up and give it to her polity after she calms down. Eventually she will learn so don't be to worried.