论文部分内容阅读
在“垂线和平行线”这部分知识的学习中,相互垂直的直线、垂直线段、垂足、点到线之间的距离这些相互联系却又有着不同含义的概念,一直是学生理解的难点。在教学“认识垂线”时,我让学生通过比较相交的两条直线和相互垂直的两条直线这两组图形的异同点,初步认识“垂直”。接着,根据图形认识垂足、相互垂直和垂线等概念。在巩固练习阶段,我出了一组辨析题,以加深学生对这些概念之间关系的理解。其中一道是判
In the study of this part of the knowledge of vertical and parallel lines, the interconnected but different meanings of mutually perpendicular straight lines, vertical lines, foot-drop and point-to-line have always been understood by students Difficulties. In teaching “know the vertical ”, I let the students through the comparison of two straight lines and two perpendicular to each other the two groups of similarities and differences between the graphics, preliminary understanding “vertical ”. Then, according to the graphic understanding foot drop, vertical and perpendicular to each other and other concepts. During the consolidation exercise, I came up with a set of analysis questions to deepen students’ understanding of the relationship between these concepts. One of them is a sentence