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“按不同标准分类”是苏教版二年级下册第八单元“数据的收集与整理”的第一课时。这一单元是学生在小学阶段第一次接触的统计活动。在正式开展统计活动之前,教材单独安排例1教学按不同标准对简单数据进行分类,初步体验整理数据的常用方法,旨在为进一步学习统计及其他方向的数学知识积累一些感性经验。一、初惑:学生应该收获什么?——技能或思想第一次试上,教学重点被设定为“指导学生按不同标准分类,整理并正确地表示这些数据”。为了帮助学生得到比较“整齐美观”的
“According to different standards ” is the second edition of the second edition of the Soviet version of the eighth unit “data collection and finishing ” the first class hour. This unit is the first statistical exposure of students to primary school. Before the formal statistical activities, the textbook arranges the teaching of Case 1 to classify the simple data according to different standards, so as to initially experience the common method of data compilation. The aim is to accumulate some emotional experiences for further studying statistics and other maths. First, the initial confusion: What should students gain? - Skills or ideas for the first time try, the teaching focus is set to “guide students to classify according to different standards, organize and correctly represent these data ”. In order to help students get more “neat and beautiful”