自然实验教学的成败与实验材料的关系十分密切，选择实验材料一般要注意以下几个问题。1要选择足够数量的实验材料小学生的特点是好动、好问、好奇，易被新鲜事物所吸引，渴望自己动手去探索新知识，课堂上的实验自然就成为他们非常喜欢的一项活动了。同时，做实验既是培养学生 The relationship between the success or failure of natural experimental teaching and experimental materials is very close, the choice of experimental materials generally pay attention to the following questions. 1 to choose a sufficient number of experimental materials Primary pupils are characterized by active, good questioning, curiosity, easy to be attracted by new things, eager to explore new knowledge yourself, in-class experiments naturally become their favorite activity . At the same time, experimenting is not only to train students