雅思写作范文：电脑替代老师？(六)

　　Get up, boy, it is time to go to school.

　　I dislike having get up early. I can take an on-line lesson at anytime I like.

　　It is a completely ordinary dialogue occurring in modern life. Yes, it is the computer, whose ever-accelerated updating brings about tremendous changes in our school lives. A typical application is Computer Assisted Instruction , which aids teacher to impart knowledge to student more efficiently by its multimedia characters. However, a vigorous debate over the issue whether or not teacher are by no means important in pedagogy field has intrigued the public. In my submission, the computer can be great help of teacher but they can never replace or surpass the position of teacher. I will offer the following reasons.

　　Firstly, CAI are designed and programmed by human instructor. They only condense parts of teachers experience and intelligence. Moreover, being a successful instructor requires not just these factors but a wealth of experience and interpret new experiences using that information. The computer after all are man-made machine.

　　Secondly, the progress of instruction is complicated and complex, and the educational achievement of CAI is limited. Some sorts of course, such as basic educational course, are not necessarily to be expressed by the computer to reach productive effect.

　　Finally, communications and interactions with teacher and computer are quite different. The latter is too impersonal, which ruins the pleasure of emotional exchanges. Sometimes gazing at the cold flickering screen is a disinteresting and tiring experience.

　　Admittedly, though computer may help teacher to provide student with a richer and more effective learning environment, yet they can not substitute the position of teacher, not only today, but the future.