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教学内容:人教版数学六年级下册第100页。教学片段:探究平面上连点成线段的规律。1.画图:以平面上不在同一直线的5个点为例画线段。师:平面上不在同一直线上的5个点可以连成多少条线段呢?请同学们自己动手画一画,边画边填写下列表格。(要求:从2个点开始,逐渐增加点数连线段。)评析:以平面上几个点为端点,可以连多少条线段,这类问题看似简单,其实学生在连线段时很容易出错,但这种以几何形态显现的问题,便于学生动手操作,通过画图,由简到繁,发现规律。解决这类问题常用的策
Teaching content: PEP sixth grade of the first volume of the first 100 pages. Teaching fragments: to explore the law into the line segment on the plane. 1. Drawing: 5 points on the plane is not the same line as an example to draw a line. Teacher: How many lines can be made up of 5 points that are not on the same plane? Please draw the pictures yourself and fill in the following form while drawing. (Requirement: Starting from 2 points, gradually increase the number of points link.) Comments: Several points in the plane as the endpoint can be connected to the number of lines, such problems may seem simple, in fact, when students are very easy to connect segments Errors, but the problem of geometric forms, easy for students to operate, by drawing, from simple to complex, and found the law. Common solution to such problems