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一、内容剖析与解读“课标”(2011版)第一学段对长度部分的要求:能结合生活实际,经历用不同方式测量物体长度的过程,体会建立统一度量单位的必要性。在实践活动中,体会并认识长度单位千米、米、厘米,知道分米、毫米,能进行简单的单位换算,能恰当地选择长度单位。能估测一些物体的长度,并进行测量。从要求中可知,小学阶段对长度概念的学习不是仅仅停留在认识、测量的层面,还要经历统一度量单位的过程,能结
First, the content analysis and interpretation “class standard ” (2011 version) The first section of the length of the requirements: can be combined with the reality of life, through different ways to measure the length of the object process, experience the need to establish a unified measurement unit. In practice, experience and understanding of length units km, m, cm, know decimeter, mm, can be a simple unit conversion, can choose the appropriate length unit. The length of some objects can be estimated and measured. As can be seen from the requirements, the study of the concept of length in primary school does not stop at the level of knowledge and measurement, but also undergoes the process of unifying the unit of measure