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演示实验是科学课堂实验教学中最主要的实验形式之一。在日常演示实验的教学过程中,有时会出现实验现象直观性不强、实验操作难度大、难以出现预期的效果、实验等待时间过长、学生对实验的操作不理解等现象。通过增强实验的直观性、降低实验操作难度、合理缩短实验时间、改变实验呈现方式等对策力求提高演示实验教学中学生的有效参与程度。
Demonstration experiment is one of the most important experimental forms in science classroom experiment teaching. In the process of teaching daily demonstration experiment, there are some phenomena such as the lack of intuition of experimental phenomena, the difficulty of experimental operation, the expected effect, the long waiting time of experiment, and the misunderstanding of experimental operation by students. By enhancing the intuitiveness of the experiment, reducing the difficulty of experimental operation, reasonably shortening the experiment time and changing the way of experiment presentation, the author tries to improve the effective participation of students in demonstration experiment teaching.