In the process of school education, we don't pay more attention to some problem students, but directly exclude them from the group, such as those who stand on the wall, have offices, stay out of school late, are not allowed to participate in group activities, and so on. -Students with poor academic performance are not allowed to participate in extracurricular activities of students with good academic performance. If some schools invite experts to give lectures, it is stipulated that students with poor learning cannot attend.
-Show students' homework or achievements in front of all students and treat them with discriminatory language and actions. -students are divided into three categories according to their academic performance: good, average and poor. Even in a class, students of different categories study different courses respectively.
-Label students, which is permanent, unchangeable and cannot be torn off. On the basis of classifying students, there are labels on the back to indicate their respective categories.