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我们自然教师,应该根据教材内容,尽可能地自制教具,以适应教学的需要。自制教具,必须注意下列几点:1. 要贯彻勤俭节约精种,做到不花钱或少花钱而能把事情办好。我们应在平时注意搜集一些竹片、木块、废瓶、空罐、洋线轮轴、废灯泡、灯罩、皮鞋油盒、软木塞、胶鞋废等废品。这些东西,在自制教具时都是很有用的材料。例如我用废电灯泡、软木塞和鹅毛管制成了一具蒸汽轮机模型,没有花一个钱。实验时,儿童除看到蒸汽冲动叶轮外,还可以清楚地看到水必须在沸腾化汽后,才能产生这一股力量,效果很好。
Our natural teachers should make their teaching aids as much as possible according to the content of the teaching materials so as to meet the needs of teaching. Self-made teaching aids, we must pay attention to the following points: 1. To carry out the hard-working and economical essence, do not spend money or spend money and can do a good job. We should usually pay attention to collect some bamboo, wood, waste bottles, empty cans, foreign axis axles, waste bulbs, lampshades, shoeboxes, corks, rubber shoes and other scrap. These things are very useful materials for self-made teaching aids. For example, I made a steam turbine model with waste light bulbs, corks and goose feathers without spending a fortune. Experiments, children in addition to see the steam impulse impeller, but also you can clearly see the water must be boiled steam, to produce this force, the effect is very good.