Applying for training institutions has many advantages, such as being led by teachers and having an atmosphere of studying together. If the self-control is average, the idea of preparing for the exam is not clear, and the direction of preparing for the exam is not clear, you can consider signing up for a class. In addition, applying for classes can also improve the efficiency of preparing for exams and increase the chances of passing exams.

However, if you have previous interview or teaching interview experience, you don't need to apply for classes. According to your own foundation, practice the structure and try to give lectures by yourself.