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在教学“相遇问题”时,对“同时出发”、“相向而行”、“相遇”等关键术语的理解总是学生学习的难点。实践证明,如果运用实物图片进行直观演示,或用投影片抽拉演示,都不可避免地受到时空限制或出现操作误差,很难使学生对以上关键术语获得准确的感知形象。那么,如何突破难点,使这棵“老树”发出“新芽”?由于多媒体集直观性、交互性、智能性于一体,能够表达大量的信息。在计算机上模拟这一运动过程,能准确显示这类问题的特点,便于教师引导学生观察、启发学生思考。因而,在数学教学中,适时运用多媒体计算机创设动态情境,能更好地吸引学生的注意力,调动学生的学习积极性,使其思维更为活跃。
In the teaching of “encounter problems”, the understanding of the key terms such as “starting at the same time”, “going in the opposite direction”, “meeting” and so on is always a difficult point for students to learn. Practice has proved that if the use of physical pictures for visual presentation, or use the slide to pull the presentation, are inevitably subject to space-time constraints or operational errors, it is difficult to enable students to obtain accurate perception of these key terms image. So, how to break through the difficulties, so that this “old tree ” issue “new shoot ”? Because of multimedia set of intuitive, interactive, intelligent in one, can express a lot of information. In the computer simulation of the movement process, can accurately show the characteristics of such problems, to facilitate teachers to guide students to observe and inspire students to think. Therefore, in mathematics teaching, the timely use of multimedia computer to create a dynamic situation can better attract students’ attention, arouse their enthusiasm for learning and make their thinking more active.