Gaotu implements the dual-teacher teaching mode of combining large classes with small classes, that is, one lecturer teaches in the large class and another lecturer helps answer students' questions in class, and then forms small classes for targeted counseling after class. Newcomers must start from the second lecture, unless they are very experienced teachers, they can give lectures directly, but this is not very common. Second, teachers can learn many good teaching methods besides class management methods. Gaotu's lecturers are all famous school graduates or experienced teachers, and they can learn a lot. If they do well, they will naturally have the opportunity to give lectures.