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一、注重概念的渗透就是以启发性原则为主。要求教师深入钻研教材,把握教材的重点、难点例如在教学圆柱体的表面积这部分时,我是这样引导的:通过展示圆柱的展开图后,可以知道圆柱展开图就变成两个圆和一个长方形。与此同时,圆柱的侧面展开就是长方形,由此知道:圆柱的底面周长就是长方形的长,圆柱的高等于长方形的宽,由长方形的面积=长×宽,所以:
First, pay attention to the concept of infiltration is based on the principle of inspiration. Ask the teacher to drill down into the textbook to grasp the key points of the textbook. For example, when teaching the surface area of the cylinder, I guide the way: By displaying the expansion diagram of the cylinder, you can see that the cylindrical expansion diagram becomes two circles and one rectangle. At the same time, the cylindrical side of the expansion is rectangular, which knows: the bottom circumference of the cylinder is rectangular, cylinder height equal to the width of the rectangle, the area of the rectangle = length × width, so: