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量一量,比一比1.内容与结构。这是“综合与实践”的主题活动。其编排目的在于通过实际测量活动,加深学生对厘米和米的认识,巩固用刻度尺量物体长度、高度的方法,同时形成对所测对象的清晰的表象,为以后估计、认识其他物品的长度提供更多的参考标准,进一步建立长度观念。更为重要的是,在这个过程中让学生体会测量的本质,能选择合适的标准(“单位”),用多种不同的方式表示物品的长度或高度,增强对“量”的实际意义的理解,同时初步培养学生的估测能力、长度观念和数感。2.具体教材分析。从具体编排来说,该实践活动分为3个层次。
A quantity, a ratio of 1. Content and structure. This is the theme activity of “Synthesis and Practice”. The purpose of the arrangement is to deepen students’ understanding of centimeter and meter by means of actual measurement activities and to consolidate the method of measuring the length and height of objects with scales to form a clear appearance of the measured object and to know the length of other objects for future estimation Provide more reference standards, to further establish the concept of length. More importantly, in this process, students should understand the nature of the measurement, choose the appropriate standard ( “unit ”), represent the length or height of the item in many different ways, The practical significance of understanding, and initially cultivate students’ ability to assess the length of the concept and number of flu. 2. Specific teaching material analysis. From the specific layout, the practice is divided into three levels.