Fat Father and Fat Daughter

Divorced family, unbearable family environment, disabled family members, but unfortunately her father was once an excellent person and wanted to train his daughter to become a talented person. My daughter is a left-behind child. She has developed the habit of stealing and cheating since she was a child. She always pretends to be obedient, but in fact she is lazy and lacks ambition. Her academic performance is very poor, especially in science. She relies on coaxing to get upgraded year after year! Now that the high school entrance examination is approaching, beating and scolding is not the answer. How should parents educate their children? Especially since both father and daughter have grown fat...