I am doing art training and want to enroll students. How can I get in touch with the headmaster and teachers of the school? I don't know the teachers in public schools.

Don't ask the headmaster about it. Contact anyone in the school. If the relative contact points are the academic director and the class teacher. You can go to the doorman and say that you are the parents of the students and want to talk to the director about something. He will definitely ask you to call the director, just pretend to call, and then say it's empty. You can ask the director's phone number, and he will basically tell you. Let you call in. You know, try to call later and say no one answered. You can go now.