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教学内容:人教版《义务教育教科书·数学》三年级上册第21-22页例1。教学目标:1.使学生认识长度单位毫米,建立1毫米的长度观念,会用毫米作单位进行测量,知道“1厘米=10毫米”。2.通过估计、测量、交流等活动建立1毫米、几毫米的表象,培养学生简单的推理能力和解决问题的能力。3.通过探究活动培养学生的操作能力和数学语言表达能力,发展学生的空间观念。教学重点:使学生认识毫米并建立1毫米、几毫米的长度观念。教学难点:估一些物体的长度,并会
Teaching content: PEP “compulsory education textbooks, mathematics,” the third grade volume on page 21-22 Example 1. Teaching Objectives: 1. To enable students to understand the length of the unit mm, the establishment of 1 mm length concept, will be measured in millimeters, know “1 cm = 10 mm ”. 2. Create appearances of 1 millimeter and a few millimeters through activities such as estimation, measurement, and communication to develop students’ ability to reason easily and solve problems. Through the research activities to cultivate students ’ability to manipulate and express their abilities in mathematics and language, and to develop students’ concept of space. Teaching Focus: Make students know mm and establish the length of 1 mm, a few millimeters in length. Difficulties: Estimate the length of some objects, and will