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让“建构”在课堂中大放异彩汪浩大气层是地球与宇宙外界的一个屏障,它看不见摸不着,人们只处于大气层的最底层,对大气层的了解仅局限于空中流星的形成原因。学生对大气层充满了无数的问题质疑,想获得无数关于大气层的知识,因而有良好的学习兴趣。这就成了叶老师上《大气层》的有利切入点。一、对比教学,概念建构老师抛给学生第一个问题:爬山时,越往高处爬,气温怎么变化?学生根据自己的原有认知,很容易就能解决如此问题:高度越
Let “constructivism ” shine in the classroom Wang Hao The atmosphere is a barrier between the earth and the outside world. It can not be seen or touched. People are only at the bottom of the atmosphere. The understanding of the atmosphere is only limited to the formation of air meteors . Students are questioning the atmosphere with countless questions and wanting to gain countless knowledge about the atmosphere and thus have a good interest in learning. This has become a leaf teacher on the “atmosphere” of the favorable entry point. First, the contrast between the teaching, the concept of construction The teacher throws the students the first question: climbing, climbing higher, how the temperature changes? According to their own original knowledge, students can easily solve this problem: the height of the more