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《怎样认识物体(二)——空气》(第一册第三课)是继教学“水”之后,用对比实验的方法进一步认识物体的一课。通过本课的教学,使学生认识空气的存在和它的基本性质,从而培养他们用实验手段和对比的方法认识物体的能力。教学的重点是让学生通过实验,进行观察,认识空气的存在。其中,引导学生由观察和实验得到的现象,证明空气的存在和概括它的基本性质,是教学的难点。这一课我打算这样进行: 一、本课是观察实验课,通过实验证明空气确实存在,而且充满整个空间。然后,与水作比较,结合日常生活中的感受,认识空气的性质。所以,整个教学任务分“证明空气的存在”和“归纳空气的性质”两个阶段完成。教学时间两课时。
How to Understand Objects (2) - Air (Book 1, Lesson 3) is a lesson to further understand objects after teaching “water” by means of comparative experiments. Through the teaching of this lesson, students are enabled to recognize the existence of the air and its basic nature so as to develop their ability to recognize objects by experimental means and comparative methods. The focus of teaching is to allow students through experiments, observation, understanding of the existence of air. Among them, to guide students from observation and experiment to get the phenomenon, to prove the existence of air and summarize its basic nature, is the teaching difficulties. This lesson I intend to do this: First, this lesson is to observe the experimental class, through experiments that air does exist, but full of space. Then, compare with water, combine the feeling in daily life, understand the nature of the air. Therefore, the whole teaching task is divided into two phases: “proving the existence of air” and “inducing the nature of air”. Teaching time two class hours.