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交流是指学生在已有知识、经验和现有信息的基础上,通过简单的思维加工,作出自己的解释或得出自己的结论。它是科学探究活动的重要组成部分,也是探究活动后必不可少的环节。目前,交流活动在课堂教学中的地位已日益被广大教师所重视,但是学生“口欲言而不能,心求通而未达”的现象时有发生。笔者现以“探索马铃薯沉浮的原因”教学片段为例加以说明。教师演示实验:先后往一杯水中倒入一些油和蜂蜜,过一会儿,分别放入塑料块、葡萄和软木塞。
Communication refers to the students based on existing knowledge, experience and existing information, through simple thinking processing, make their own explanation or come to their own conclusions. It is an important part of scientific inquiry activities and an indispensable link after exploring activities. At present, the exchange activities in the classroom teaching position has increasingly been valued by the majority of teachers, but the students “mouth can not speak, heart seeking but not up to ” phenomenon have occurred. The author is now “to explore the causes of potato ups and downs ” teaching fragment as an example to illustrate. Teacher demonstration experiment: Pour some oil and honey into a glass of water one after another, and put them in plastic blocks, grapes and corks respectively.