精心设计探究活动,能够有效构建趣味课堂。而趣味课堂和探究意识的开发,则有利于激发小学生学习的不竭动力。教学小学科学“气体的热胀冷缩”时,我从引发学生的新奇感和问题意识入手,课的一开始就出示一个空瘪的矿泉水瓶,同时投影“任务书”:不拧开矿泉水瓶盖,能不能用热水、冷水让它由瘪变鼓,又由鼓变瘪?比一比,看谁先完成任务。在准备有盖的矿泉水瓶时,我有意为几个小组设置有洞瓶盖的障碍,活动一开始,矛盾冲突就出现了,学生的探究兴趣由此而产生。通过 Careful design of inquiry activities, can effectively build fun class. However, the development of interesting classrooms and explorations is conducive to motivating pupils to learn. Teaching primary science “gas thermal expansion and contraction ”, I start from the sense of novelty and sense of problem students start, the beginning of the class to produce an empty bottle of mineral water, while projecting “task book ”: not Unscrew the bottle of mineral water, can not use hot water, cold water to make it from deflated drum, but also by the drum deflated? Than a ratio to see who should complete the task. In preparation for a covered mineral water bottle, I intend to set up a bottle cap barrier for several groups. From the very beginning of the activity, contradictions emerged and the students’ interest in exploration came about. by