小学数学教学过程中,我们恰当地运用电教手段,可使学生快速、高效地获取所学知识,发展思维、形成各种学习能力。但实际教学中,不少电教课效果欠佳,其中很重要的原因就是没有抓住电教媒体在教学过程中的作用点。下面我结合教学实践谈谈何时运用电教媒体最合适。一、新旧知识的连接点上如教学“分数的意义”时,我设计了两组画面。第一组认识一个数或一个计量单位的几分之一、几分之几,再通过学具操作,让学生折折、摆摆、画画,感知单 In the process of primary school mathematics teaching, we make proper use of the means of electric education so that students can quickly and effectively acquire the knowledge they have learned, develop their thinking and form various learning abilities. However, the actual teaching, many poor effect of audio-visual education, one of the most important reason is that there is no grasp of the role of audio-visual media in the teaching process. Now I combine teaching practice talk about when to use audio-visual media the most suitable. First, the connection point between old and new knowledge such as teaching “meaning of the score ”, I designed two sets of screen. The first group to know a few or a unit of measure a fraction, a few, and then through the operation of learning tools, so that students fold, posing, painting, perception of a single