在今天的各类教学活动中,媒体已经成为当然的组成部分,以至于人们常常忽略了“教师”也是教学过程中最重要的“媒体”。Smaldino等人认为,课堂教学中,有六种媒体用的最多,分别是视频、电视、图表(diagram)、印刷资料、计算机和教师。[1]这六大类都符合媒体的定义,当这些媒体用来完成教学任务的时候,就成为教学媒体。一个多世纪以来,教师一直在使用各种音、 In today’s various types of teaching activities, the media has become an integral part of course, so that people often overlook the “teacher ” is the teaching process of the most important “media ”. According to Smaldino et al., There are six types of media used most in classroom teaching: video, television, diagrams, printed materials, computers and teachers. [1] These six categories are in line with the definition of the media, when these media to complete the teaching task, it becomes a teaching media. For more than a century, teachers have been using various sounds,