First of all, Bian Xiao thinks that the math in the cram school is getting worse and worse. It may be because the math knowledge taught by the cram school teacher is beyond the students' understanding, that is to say, the teacher does not teach too difficult knowledge without understanding the students' foundation, which makes it difficult for students to understand. Because the basic knowledge is not mastered, it will interfere with students' original foundation to a certain extent, make students confused about the simple knowledge they have mastered before, and lead to worse and worse math scores.
Secondly, it is also possible that the teacher did not do his duty in the process of counseling. Many cram schools are in the name of tutoring mathematics, but students are required to do math homework on the day they arrive at school. Because some students can't do it, they will copy the math answers that other students have already finished in the cram school, which will lead to students neither making up for it, nor consolidating what they have learned through homework. If this goes on, students' math scores will get worse and worse.
Another situation is that the teacher teaches very seriously, which is also suitable for the current situation of students. However, because students are not good at math and have resistance to math, they don't study well in cram schools, don't listen carefully in class, and don't cooperate with teachers to improve their weaknesses in cram schools. In the long run, the more tutoring, the stronger the resistance, which will affect students' normal study at school and lead to students' failure in math.