Should the kindergarten notification SMS be sent by the main class or the assigned class?

The head teacher refers to the director of a class, also called the head teacher. He is a teacher who is fully responsible for the ideological, learning, health and life work of a class in the school. He is the organizer, leader and educator of a class, and also the coordinator of the teaching and education work of all teachers in a class. The essential difference between him and the teacher is that the teacher is only responsible for the teaching of the subject, and the class teacher is solely responsible for managing a class.