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课题:勾股定理。课型:新授课教学目的:使学生理解割补法证明勾股定理的思路,掌握勾股定理的内容,培养学生观察图形,分析问题的能力。教学方法:发现法教具:是硬纸剪成的8个全等直角三角形,每个三角形三边按规定标上a,b,c,并用三种颜色描出边线。教学过程:上课开始,先在黑板左上方写出课题。提出本课任务,说明采用方法,(4分钟) 一、演示实验(3分钟) 教师将8个三角形用胶布贴在黑板右上方,如下图所示。
Topic: Pythagorean theorem. Course Type: New Teaching Objective: To enable students to understand the idea of the censorship theorem by the topping method, to grasp the content of the Pythagorean Theorem, and to develop the ability of students to observe patterns and analyze problems. Teaching methods: Discovering teaching aids: Eight equal-angle triangles cut from hard paper. Three sides of each triangle are marked with a, b, c, and edges are drawn in three colors. Teaching process: At the beginning of class, write the topic at the top left of the blackboard. Present the task of this lesson and explain how to use it. (4 minutes) 1. Demonstrate the experiment (3 minutes) The teacher puts eight triangles on the upper right of the blackboard with adhesive tape, as shown in the figure below.