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在小学数学教学中,概念的理解、知识的辨识、平面图形面积计算公式的推导等是难点。下面我就如何运用投影手段解决这些教学难点谈点体会。一、图文结合,理解概念。以形象思维为主的小学生对数学中的概念往往难以理解,我便设计图文结合的投影片,让学生从具体的形象中逐步理解抽象的概念。例如教学真分数、假分数、带分数的概念时如图(一)①②设计,这样可以让学生通过图文对照,加深对假分数大于或
In elementary mathematics teaching, it is difficult to understand the concept, recognize the knowledge and deduce the formula of the area of the plane figure. Here I will talk about how to use projection to solve these teaching difficulties. First, the graphic and text, to understand the concept. Primary school students based on image thinking often find it difficult to understand the concepts in mathematics. I have designed a combination of graphic and projection films to help students gradually understand abstract concepts from specific images. For example, teaching real scores, fake scores, with the concept of points as shown in Figure (A) ① ② design, so that students can control by graphic, deepen the false points greater than or