《电热》一课做实验效果的确不明显。《小学自然教学》曾刊登了钟祥市杨岭小学杨荣老师对此实验的改进。即,在火柴梗上涂上动物油以后把它『粘』在铁丝、铜丝和铝丝上,通电发热后,动物油熔化,火柴梗下落,从而推导出实验结论。我按上述改进的实验方法进行了实验教学,效果较好,美中不足的是学生没有能直接感知电热。 “Electric” lesson to do the experimental effect is not obvious. “Primary School Teaching of Nature” has published an improvement on this experiment by Yang Rong, Yangling Primary School, Zhongxiang City. That is, after sticking the animal oil to matchstick, sticking it to the wire, copper wire and aluminum wire, after the electricity is heated, the animal oil melts and the matchstick falls, which leads to the conclusion of the experiment. I conducted the experiment teaching according to the above improved experimental method, and the effect is better. The only drawback is that the students can not directly sense the electric heat.