The new college entrance examination model is divided into two parts according to the selected subjects, except for the number of Chinese, three must be selected, one is history, one is physics, and the other is politics, biology, chemistry and geography. The mode of expanding materials for the new college entrance examination is 3+2= 1, and the course selection includes three compulsory courses except Chinese, one for history and one for physics, and two for politics, chemistry, biology and geography. Classes are divided according to the subjects selected by students, and the same subjects are divided into the same class.