When choosing a teacher, we should give priority to the teacher's experience. Don't read the diplomas of Tsinghua or Peking University. Experience is often more important than a diploma.
Pay attention to online courses:
Students who participate in online extracurricular remedial classes have a correct attitude. Generally speaking, the network class teacher is ok, but in order to renew the fee, it is often exaggerated to say that your teacher is not good. However, don't think the teacher is too rubbish when you arrive at school. Online classes are only one or two sessions a week, so it is impossible to cover everything, and schools should be the mainstay.