建构主义指导下的课堂模式应该是以学生为中心,在大学英语教学中多媒体、网络等教学技术的支持下,教师作为课堂的环境的营造者有效地介入到学生自主的学习中。因此,大学英语教师的有效介入及其介入方式成为了提高学生们学习效率的重要前提。 The classroom model under the guidance of constructivism should be centered on students. With the support of multimedia, internet and other teaching techniques in college English teaching, teachers effectively intervene in students’ autonomous learning as the creators of classroom environment. Therefore, the effective intervention of college English teachers and their intervention has become an important prerequisite to improve students’ learning efficiency.