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1在新课导入时提问在探究“平面与平面垂直的判定定理”时,教师可以问学生:在建筑工地上,你知道建筑工人在砌墙时经常采用什么办法来检查所砌的墙面与地面是否垂直吗?很多学生回答可以采用一端系有铅锤的线来检测墙面与地面是否垂直,如果系有铅锤的线和墙面紧贴,则墙面与地面垂直,否则就不垂直。这个依据是否正确呢?这节课我们一起来验证一下。教师通过课堂提问的方式导人新课,能够激发学生的学习兴趣,引起学生的有意注意,有效提升数学课堂效率。
1 When asked to introduce a new lesson When exploring “The Decision Theorem for Plane and Plane Verticality,” a teacher can ask a student: On a construction site, you know how often builders check the walls Is the surface perpendicular to the ground? Many students reply that a plumb line can be used at one end to detect whether the wall is perpendicular to the ground. If the plumb line is attached to the wall, the wall is perpendicular to the ground, otherwise not vertical. This basis is correct? This lesson we work together to verify. Teachers through the way of class questions to guide people to new courses, to stimulate students ’interest in learning, arouse the students’ attention and effectively improve the efficiency of mathematics classroom.