We can judge whether the way the teacher attends class is helpful to students' learning by listening.
Whether a teacher has rich teaching experience, after all, such a teacher can put students' learning into practice. Just like my mother took me to teacher education before, and listened to a 50-yuan course, which was just in line with the students in Grade One. Teachers really know mathematics like the back of their hands, and there are many ways to solve problems. In this way, I learned by analogy. Success aroused my interest in mathematics, where I took remedial classes.
But math doesn't mean you have to go to cram school if you can't speak well. You can recite more formulas and brush more questions until you understand what you don't understand, and your grades will go up.