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背景与主题: “桌子有多长”选自北师大版实验教材数学一年级下册14页。教材安排了丰富的活动,如估测物体的长度,自选工具测量物体的长度,实际测量物体的长度等。通过这些活动,使学生体会到统一长度的必要性,体会厘米的实际意义,形成估测意识,掌握测量的技能,培养合作与交流的能力,进一步发展学生的空间观念。 教学目标: 1.经历用不同的工具测量同一物体长度的过程,体会统一长度的必要性。
Background and theme: “how long the table” selected from the Beijing Normal University experimental teaching materials first grade next 14 pages. The course arranges a wealth of activities, such as estimating the length of an object, measuring the length of an object with a tool of choice, and actually measuring the length of an object. Through these activities, students can understand the necessity of unifying the length, realizing the practical significance of centimeters, forming a sense of estimation, mastering the skills of measurement, cultivating the ability of cooperation and exchange, and further developing students' space concepts. Teaching Objectives: 1. Experience with different tools to measure the length of the same object process, the need to understand the unity of length.