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一、应用交互白板,创设生活情境,丰富感性认识学生空间观念的建立是从生活经验开始的,学生的经验越丰富,就越能帮助他建立正确的表象。对于一些几何体、几何现象都能在生活中找到它的原型,因此教学中,教师要善于利用生活中的资源,唤起学生的回忆。如,在教学“平移与旋转”时,我运用多媒体,体现直观动感的优势,在白板上演示国旗沿旗杆徐徐上升、直升机螺旋桨旋转等动态情境,引导学生观察物体运动,初步建立对这两种运动的具体感性认识,并通过观察、对比,进一步感知平移与旋转,为建立正确的空间观念打下基础。
First, the application of interactive whiteboard, creating a life situation, enrich the perceptual awareness of students The establishment of space concept is from life experience, the more experienced students, the more they can help him establish the correct appearance. For some geometry, geometric phenomena can find its prototype in life, so teaching, teachers should be good at using resources in life, to arouse the memories of students. For example, in the teaching of “Panning and Rotating”, I used multimedia to demonstrate the advantages of intuition and motion. I demonstrated on the whiteboard the dynamic rise of the flag along the flagpole and the rotation of helicopters to guide students to observe the movement of objects. The specific perceptions of the two movements, and through the observation, comparison, further perception of translation and rotation, to establish the correct space concept and lay the foundation.