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演示实验是课堂教学的一个组成部分,是辅助课堂教学的一个重要环节,做的好就可以提高教学质量,做的不好就会影响教学质量。那么,如何安排好课堂教学中的演示实验呢?现就以无线电教学中的演示实验为例,谈谈安排演示实验应注意的几个问题。首先,演示实验的内容应该是教学的重点内容,也就是说演示实验要为教学的重点服务,根据这一原则,在讲晶体二极管时,要演示“二极管的单向导电性”,讲三级管时,要演示“三极管的电流放大作用”等等,如果离开了重点,离开了主题去做演示实验,其结果必然是化费了时间,冲淡了主题,防碍了主要内容的讲授和掌握。
Demonstration experiment is an integral part of classroom teaching, is an important part of auxiliary classroom teaching, doing well can improve teaching quality, doing bad will affect the quality of teaching. So, how to arrange the demonstration experiment in classroom teaching? Now we take the demonstration experiment in radio teaching as an example to talk about several issues that should be paid attention to when arranging the demonstration experiment. First of all, the content of the demonstration experiment should be the key content of the teaching, that is to say, the demonstration experiment should be the key service for teaching. According to this principle, in the crystal diode, it is necessary to demonstrate “one-way conductivity of the diode” When the tube, to demonstrate the “transistor current amplification” and so on, if left the focus, to leave the theme to do demonstration experiments, the result will inevitably spend time, dilute the theme, hinder the main content of the teaching and mastery .