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教学目标:1.通过拼插长方体框架,初步感受长方体面、棱、顶点的特征;2.将学习平面图形的方法迁移到立体图形的学习中来,在活动中,逐步领悟观察、分类、比较等学习方法的价值。教学重点:感受长方体面、棱、顶点的特征。教学难点:能发现影响长方体形状和大小的关键因素:长、宽、高。教具与学具:科学构件、长方体学具、课件。教学过程:一、创设情境,提出问题师:图形是我们的好朋友,想一想,我们已经认识过哪些图形?学生预设:我们认识过三角形、正方形、长方形等
Teaching objectives: 1. Through the insertion of rectangular box body, the initial impression of cuboid, rib, vertex characteristics; 2. Learn the method of plane graphics to the study of three-dimensional graphics in the activities, and gradually comprehend the observation, classification, comparison The value of learning methods. Teaching Focus: Feel rectangular, rib, vertex characteristics. Difficulties in teaching: Can find the key factors that affect the shape and size of the cuboid: long, wide and high. Teaching aids and learning tools: scientific components, cuboid learning, courseware. Teaching process: First, create the situation, ask the question division: Graphics is our good friend, think about it, we have known which graphics? Student default: We know triangles, squares, rectangles, etc.