Students are highly mobile. Every semester, more than a dozen students come in and out, all of them are gifted students, and all of them are poor students. Because the students in this class come from more than ten provinces in the motherland, there are differences in regional culture and teaching materials, and most of these students are left-behind children at home or have poor grades in their hometown, so their parents brought them to their side.

Poor study habits: Students with learning difficulties usually have no good study habits, lack interest in learning, and regard learning as a task assigned by their parents and teachers, because students are basically children of migrant workers, and their parents are busy with their work and neglected management.

In addition, they are generally fun-loving, inattentive in class, poor in self-control, more casual, do not attend classes, do not complete exercises, do not preview before class, do not review after class, can not finish their homework independently, and even often copy their tardy homework, and rarely ask others even if they have questions they don't understand.

Use spare time to coach and improve students in various situations, "teach students in accordance with their aptitude and suit the remedy to the case", and adopt corresponding methods according to students' quality. The specific methods are as follows: potential students perform in class, average students correct, and excellent students solve problems. When arranging seats, adhere to the principle of "sitting at the same table" as a study pair.

That is to say, the classroom practice of "teaching soldiers by soldiers" is divided into three levels: the first level "must do questions"-basic questions, the second level:-medium questions, and the third level "thinking questions"-extensive questions. Meet the needs of students at different levels.