人教版小学数学第二册教材中把“长度单位”放在首页,很多老师都惧怕它,首先是怕在课堂上进行“估一估、量一量”的操作活动麻烦,当然也怕不进行操作活动的话,长度单位的知识点会落实不到位,枯燥的讲解会影响学生后续的学习状态,再则,准备各种操作学习活动的学具该是件多么劳心的事,有的老师索性将第二单元提 PEP Teaching in the second volume of textbooks to “unit of length ” on the home page, many teachers are afraid of it, first of all afraid of in the classroom “estimate, measure a quantity ” operating activities, Of course, afraid of not operating activities, the knowledge of the length of the unit will be implemented in place, boring to explain the status of students will affect the follow-up study, and then, to prepare a variety of operating learning activities of the learning tool is what a painstaking thing, Some teachers simply will mention the second unit