With the expanding of the English class size,it is worthwhile for teachers to do the research work on how teachers enable the students to improve not only their abilities to read and write,but also their abilities to speak and listen in classroom teaching and learning of College English.This paper explores the way to inspire students’ interest of speaking English by design certain activities,which students can create their own dialogue to practice and improve their communicative competence,and attempts to find out the effects of cooperative learning on the students’ English proficiency,specifically their speaking ability in large-sized class English language teaching as well as their attitude towards cooperative learning in the large English class. With the expanding of the English class size, it is worthwhile for teachers to do the research work on how teachers enable the students to improve not only their abilities to read and write, but also their abilities to speak and listen in classroom teaching and learning of Student English. This paper explores the way to inspire students ’interest of speaking English by design certain activities, which students can create their own dialogue to practice and improve their communicative competence, and attempts to find out the effects of cooperative learning on the students’ English proficiency, specifically their speaking ability in large-sized class English language teaching as well as their attitude towards cooperative learning in the large English class.