在一次县组织的课题研讨课中,我执教了北师大版三年级下册《平均数》一课,这一内容是学生在二年级学习平均分的基础上进行教学的。本节课教学重点是在导入环节通过具体实例,体会学习平均数的必要性,了解实际问题。只要把体现的平均数价值这个关键处弄懂了,对平均数的认识问题也就迎刃而解了。但由于各种原因,最后临时决定在二年级上,遗憾的是本节课虽自认为很顺利的完成了预设的教学 In a county organization seminar, I coached a third grade undergraduate “average” a lesson, this content is the second grade students in the average score based on teaching. The teaching of this lesson focuses on the import link through the specific examples, the need to understand the average number of learning to understand the actual problems. As long as the key to understand the value of the average reflected in the understanding of the average number of problems will be solved. However, for a variety of reasons, the final provisional decision in the second grade, unfortunately, this lesson, although considered itself well completed the default teaching