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问题的出现《摆的研究》是五年级第三单元“时间的测量”中的第6课,本课的重点是让学生明确摆的快慢与摆锤的重量无关,与摆幅的大小无关,仅与摆绳的长短有关,同一个摆,摆绳越长摆动越慢,摆绳越短摆动越快。在本课教学时,直接导入,引出问题,摆的快慢跟哪些因素有关。从学生的回答中发现,班级只有四分之一的学生认为跟摆绳的长短有关,其余学生中大部分认为跟摆锤的重量有关,不有小部分学生认为跟摆幅有关。根据学生的猜测统计,
The emergence of the problem “Pendulum of the study” is the fifth unit of fifth grade “time measurement ” in the sixth lesson, the focus of this lesson is to make students clear the speed of the pendulum has nothing to do with the weight of the pendulum, and the size of the swing Nothing to do with the length of the rope, the same pendulum, the longer the pendulum, the slower the pendulum, the shorter the pendulum rope swing faster. Teaching in this lesson, direct import, lead to problems, what the speed with what. According to the students’ answers, only one quarter of the students in the class thought it was related to the length of the rope. Most of the remaining students thought it was related to the weight of the pendulum. Not a few students thought it related to the swing. According to the students’ guess statistics,