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2010年11月,笔者代表湖南省参加全国小学科学特级教师论坛展示课活动,执教课题为“空气占据空间”。这一内容在小学科学教学中可谓经典。其代表实验为浸不“湿”的纸,即将一团干的纸压到一空玻璃杯底,将玻璃杯竖直压入水底,杯底的纸不会湿。原自然教材及现行多个版本的科学教材均设计了这一实验。此外,广大一线教师还设计了一些具有操作性且实验现象明显的小实验,如“不漏水的漏斗”实验等。作为一堂面向全国科学教师的课,笔者
November 2010, the author on behalf of Hunan Province to participate in the National Primary Special Teachers Forum demonstration class activities, coaching topics for “air space”. This content can be described as a classic in primary science teaching. The representative of the experiment is immersed “wet ” paper, a group of dry paper is pressed into an empty glass bottom, the glass is pressed vertically into the bottom, the bottom of the paper cup will not be wet. The original natural teaching materials and current versions of science textbooks are designed this experiment. In addition, a large number of front-line teachers also designed a number of experiments with obvious experimental small experiment, such as “leaky funnel ” experiment. As a class for the national science teacher, the author