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教学内容北师大版《义务教育课程标准实验教科书·数学》四年级下册第27-29页“三角形内角和”。教学目标知识与技能:1.通过直观操作的方法,探索并发现三角形内角和等于180°,让学生在实践活动中,体验探索的过程和方法。
Teaching contents The Beijing Normal University version of “compulsory education curriculum standard experimental textbook mathematics” fourth grade volume 27-29 page “triangle internal angle and ”. Teaching Objectives Knowledge and Skills: 1. Explore and discover the internal angles of the triangles and 180 degrees through intuitive methods to enable students to experience the process and methods of exploration in practical activities.