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[背景与导读]《生命之源——水》是新课标下《科学》教材三年级上册内容。这单元内容在教师的组织引导下,学生通过观察、操作、实验,了解水的一些基本性质和特征。因为学生对水知识的了解和掌握远远不够,所以,我在学生学习了百分数及一些大数后,设计了这节课的内容。一是使学生对有关“水”的知识加深拓展认识;二是让学生了解大数和百分数在生活中的运用,用数学验证科学知识;三是培养学生搜集资料、整理资料的能力。本节内容适合五六年级实践活动课。
[Background and introduction] “The source of life - water” is the new curriculum “science” textbook third grade content. Under the guidance of the teacher’s organization, students learn the basic properties and characteristics of water through observation, operation and experiment. Because students know and grasp the water knowledge is not enough, so I designed the content of this lesson after the students learned the percentage and some large numbers. First, to enable students to deepen their understanding of the “water” knowledge; Second, let students understand the use of large numbers and percentages in life, using mathematical proof of scientific knowledge; third is to train students to collect information, the ability to organize data. This section is suitable for fifth and sixth graders practice class.