I am a student in No.1 Middle School. As far as I know, generally speaking, teachers from five schools in the city, especially from three schools in the city, will not teach outside alone. Even if there is, it is done in private. Because in No.1 Middle School, teachers' salaries are relatively high and various benefits are relatively complete, the leaders do not allow teachers to tutor other students outside. So it's best not to trust those who say they are teachers in five schools in the city. They are generally retired. This tutorial has no effect. After all, the types of college entrance examination have changed greatly in recent years, and teachers are still actively adapting to the reform, not to mention foreign students who only take one class a week.