有一位教育家说过:人们告诉我的容易忘记;课本告诉我的我将牢记;结论自己得出的我将终生不忘。这告诉我们要使学生真正获得自然科学知识,就必须在认识的全过程中让学生积极参与,自己动手实验,作出比较,开动脑筋,去分析、去综合。同时,也说明知识的获得与能力的培养是同步的。这里我以《电磁铁》一课为例浅谈一下指导学生在获得知识时,如何培养学生抽象概括能力和 One educator said: People tell me easy to forget; textbooks tell me I will keep in mind; I concluded that I will never forget. This tells us that in order for students to truly acquire knowledge of natural sciences, we must enable students to actively participate in the whole process of understanding, do experiments on their own, make comparative comparisons, start their brains, analyze and synthesize. At the same time, it also shows that the acquisition of knowledge and ability training are synchronized. Here I take “Electromagnet” as an example to talk about how to guide students in acquiring knowledge, how to develop students' abstract abilities and