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教学内容苏教版《数学》三年级(下册)第26-28页。教学目标1.通过观察实例,初步感知物体平移和旋转的运动特点,感知平移、旋转现象,发展空间观念。2.通过观察、操作,正确判断方格纸上图形平移的方向和距离。3.能在方格纸上画出一个简单图形按指定方向和距离平移后的图形。教学过程一、感知平移和旋转现象1.分类,感知。(1)教师依次出示火车、电梯、风扇的叶片、直升飞机的螺旋桨、缆车、钟摆6个运动画面(见教材第26页),提问:它们的运动都相同吗?你们能根据它们不同的运动现象,给它们分分类吗?
Teaching content Sujiao Edition “Mathematics” third grade (second volume) Pages 26-28. Teaching Objectives 1. Through the observation of examples, the initial perception of translation and rotation of the object movement characteristics, perception of translation, rotation phenomenon, the development of space concept. 2. By observing and manipulating, correctly determine the direction and distance of graph shift on graph paper. 3. Can draw a graph on the graph paper in the specified direction and distance after the shift of the graphics. Teaching process A perception of translation and rotation phenomenon 1 classification, perception. (1) The teacher shows the six moving pictures of trains, elevators, fan blades, helicopter propeller, cable car, and pendulum in sequence (see textbook page 26). Question: Do their motions are the same? Sports phenomenon, to classify them?