根据教育部2004年颁布的《大学英语课程教学要求》,各个高校展开基于计算机网络的大学英语教学改革。传统教学方法受到严峻的挑战,教师所扮演的传统角色受到冲击。鉴于此,大学英语教师应该从建构主义理论出发,转变传统知识传授者的角色成为课堂的指导者、帮助者、提示者、监控者和评估者。 According to the “College English Curriculum Requirements” promulgated by the Ministry of Education in 2004, all colleges and universities carry out the reform of college English teaching based on computer networks. The traditional teaching methods are severely challenged and teachers’ traditional roles are challenged. In view of this, college English teachers should start from the constructivism theory and change the role of the traditional knowledge transferor to become the mentor, helper, reminder, supervisor and assessor of the class.