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有声、有色,形象直观的电教手段能引起学生的认知兴趣,引发注意,增进课堂教学效果。但要充分发挥其作用,还必须在使用中根据教学实际需要,做到适时、适度、适式。适时教学中各个环节都可使用电教媒体,但要用于适当的时机。一般说,在学生感受到事物的鲜明形象时;在学生对语言文字的意蕴若有所悟时;在学生进入课文情境,情感的闸门即将打开时;在教师提出问题,学生启而不发时;在理解课文重难点,学生对知识的需求已经形成时……使用电教媒体,能获得最佳效益。
Audio-visual, non-ferrous, visual audio-visual means can arouse students’ cognitive interest, attract attention and improve the effectiveness of classroom teaching. However, in order to give full play to its role, it must also be timely, modest and adaptive based on the actual needs of teaching. Timely teaching can be used in all aspects of audio-visual media, but for the right time. In general, when students feel the vivid image of things, when the students understand the implication of the language and writing, when the students enter the context of the text, the gate of emotion is about to open, and when the teachers ask questions and the students do not speak ; In understanding the heavy and difficult texts, students’ needs for knowledge have been formed ... ... using audio-visual media, can get the best benefit.