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苏教版教材在教学厘米的认识之后,紧接着安排米的认识。虽然大部分学生在日常生活中听说过“米”的名称,甚至有过用“米”作单位进行简单测量的经验,但对“为什么要用米作单位”、“1米究竟有多长”、“米和厘米有什么关系”等多个问题都没有很清晰的认识。鉴于此,教学中,一要通过现实的、富有挑战的测量活动,
Su teach version of teaching materials cm in the understanding of knowledge, followed by the arrangement of rice awareness. Although most of the students have heard the name of “rice” in their daily life and have even had some experience of making simple measurements using the “rice” as their unit, they have to “use rice as a unit” “What exactly is 1 meter long?”, “What is the relationship between rice and centimeter?” And many other issues are not very clear understanding. In view of this, in teaching, we must adopt realistic and challenging measurement activities,