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为了把科学的种子播入孩子们幼小的心田,我在常识教学中给孩子们做了化学小实验。许多人认为这是不可能或不适宜的事,其实只要掌握以下几条原则,给幼儿做化学小实验非但可以,且能收到良好的效果。那就是:第一,选材与幼儿的生活实际相接近,实验内容浅显,为幼儿所能理解;第二,选用的药品要无毒、无味、无刺激性,对孩子不会有任何伤害;第三,要有趣味眭。根据以上三条原则,我在常识课上为孩子们做了化学小实验。如小实验“枯木逢春”,实验的目的是引起幼儿对科学的兴趣。课前,我用笔在纸上画好桃树枝干,再用笔在桃树枝干上用指示剂(酚酞)画桃花晾干,在喷雾器内装入碳酸钠(食用碱)溶液备用。
In order to sow the seeds of science into the young minds of children, I gave the children a small chemistry experiment in common sense teaching. Many people think that this is impossible or inappropriate. In fact, as long as the following principles are mastered, it is not only possible to give small-scale chemical experiments to young children, but also to receive good results. That is: First, the selection of material and the actual life of young children close to the experimental content of shallow, for children to understand; Second, the selection of drugs to be non-toxic, tasteless, non-irritating to children will not have any harm; Third, have fun 眭. Based on the above three principles, I did chemistry experiments for children in common sense classes. Such as a small experiment “dead wood every spring,” the purpose of the experiment is to cause children’s interest in science. Before class, I used a pen to draw peach stems on paper, then use a pen to paint the peach on the peach stems with an indicator (phenolphthalein) to dry it. Put in a sodium carbonate (edible base) solution for use in the sprayer.