Abstract: Dulangkou Secondary School is a rural boarding school in Shandong Province. The school has carried out a reform in which the students in a class are divided into four to six groups, replacing the teacher-centered teaching model with a new one that is composed of a circle of four stages:students preview, cooperative learning and teacher's guidance, presentation, and feedbacks. This practice has aroused students' enthusiasm for learning. This paper uses a training class given by Teacher X of the school as a clue, recapturing the situation of the class by describing Teacher X's words and deeds, as well as inspiration of her emotional demonstration to students. Through the narratives of the students, this paper presents the experience and harvest of the students participated in the training, so as to reflect the value pursuit of group cooperative teaching and show the significance of experiential training in teachers' professional development.