新教材注意了对学生学习方法的引导,教材中增添了旁白,教师要讲好教材更要栓释好旁白。上海市数学统编教材高中三年级拓展Ⅱ(文科,技艺)一册第11页右面旁注部分有这样一段话语:“注意:可以证明当可行域是凸多边形时,问题的最优解一定在区域边界的顶点处取得,我们可以通过比较各顶点的目标函数的值求得最优解。” The new textbook notes the guidance of student learning methods, adding narration to the textbook, the teacher should say a good text but also to interpret the narrator. The text of the paraphrase to the right of page 11 has the following discourse: “Note: It can be proved that the optimal solution of the problem is certain when the feasible region is convex polygons At the vertex of the region boundary, we can obtain the optimal solution by comparing the values ​​of the objective function of each vertex. ”