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在低年级自然教学中的观察实验成功与否,与所准备的观察实验材料有直接的关系。指导低年级学生进行观察实验,必须准备大量有结构的材料,就是学生通过动手动脑能够达到观察实验目的的材料。这些材料要具有以卜特点: 1.科学性 材料应和课文中要学习的科学概念有直接关系,使用这些材料应该能揭示许多有关的现象。例如教学《各种各样的果实》,这课的教学重点是让学生认识几种常见果实的外形特征,并按照用途结果实分类。因此,在准备观察材料时,不仅要准备苹果、梨、葡萄、香蕉、西瓜等水果;还要准备黄瓜、西红柿、辣椒、南瓜等蔬菜;也要准备苍耳、蓖麻、凤仙花、牵牛花等植物果
The success of the observation experiment in the natural teaching of the lower grades is directly related to the prepared observation materials. Instruct students in lower grades to observe the experiment, we must prepare a large number of structured materials, that is, through the brain to enable students to observe the experimental purpose of the material. These materials have the following characteristics: 1. The scientific material should have a direct relationship with the scientific concepts to be learned in the texts. The use of these materials should reveal many relevant phenomena. For example, teaching “a variety of fruits”, the teaching of this lesson focuses on enabling students to recognize the appearance characteristics of several common fruits and classify them according to their uses. Therefore, in preparation for observation of the material, not only to prepare apples, pears, grapes, bananas, watermelons and other fruits; also prepare cucumber, tomato, pepper, pumpkin and other vegetables; also be prepared cocklebur, castor, impatiens, Glory and other plant fruit