利用投影仪等电教手段进行教学,不仅课堂容量大,教学层次清晰,而且课堂学习气氛浓厚,学生的求知欲望高,教学成绩显著,反之,则显得课堂气氛活跃不足,呆板、单调有余,让人感觉教师讲得太多,学生动口动手动脑太少,讲与听、学与做有脱节的现象。为了避免教学中这些现象的发生,在我的这些年使用投影仪教学过程中,感觉到它对我的教学工作帮助太大了,有事半功倍的效果。一、投影仪在概念教学中的运用我在小学一年级讲述“加法”这一概念中,首先在投影仪上 The use of projectors and other audio-visual means of teaching, not only the classroom capacity, the teaching level clear, and the classroom atmosphere of learning, students desire for knowledge, teaching significantly, on the contrary, it appears the classroom atmosphere of active, dull, monotonous, Feel teachers talk too much, students move too little brain, speaking and listening, learning and doing have a disconnect from the phenomenon. In order to avoid these phenomena in teaching, during my teaching of projectors in these years, I feel it helps my teaching work to a great extent with a multiplier effect. First, the projector in the concept of teaching I first grade in primary school about “addition ” this concept, first on the projector