This is a way to realize the balance of school teaching, aiming at making the starting point of each class similar. This placement method can ensure the balance of students' grades and the reasonable collocation of boys and girls, and also put an end to some phenomena of pulling relationships and entering the back door. After the students' classes are arranged, the class teacher and the subject teacher are reasonably and evenly matched in advance by the school according to the teacher's ability and teaching experience, and the class teacher decides which class to teach.