本文是我给人教版教材“相交线与平行线”一章的两点建议.建议1:改编教材第9页第13题原题:直线AB、CD相交于点O.(人教版数学七年级下册第9页第13题)(1)OE,OF分别是∠AOC,∠BOD的平分线,画出这个图形.(2)射线OE,OF;在同一条直线上吗?(3)画∠AOD的平分线OG,OE与OG有什么位置关系?未讲授之前,我先让学生分组讨论本题.在解答第(2)问时,师生之间出现了严重的分歧,下面是一个 This article is my two-point proposal to teach people to teach textbook “intersecting lines and parallel lines.” Recommendation 1: Adaptation of textbooks Page 9 Problem 13 Original title: Straight lines AB, CD intersect at point O. (7) OE, OF, respectively, ∠ AOC, ∠ BOD bisector, draw this graph. (2) ray OE, OF; in the same straight line? (3) Draw the bisector of ∠AOD OG, what is the relationship between OE and OG? Before teaching, I asked the students to discuss this question in groups. When answering the question (2), there were serious differences between teachers and students, Here is one