一、利用学生已有的知识创设情境当前很多初中学校都是采用班级授课的制度,这个班级授课制很容易把完整的知识体系割裂成许许多多的片段,在客观上就分解了知识的结构,也将原有的数学逻辑联系中断开来。但是,在实际的教学中,教师如果能把握新知识与旧知识之间的联系,利用学生已有的知识导入新课,这样就可以很好地弥补这些人为造成的断裂所引起的损失,将零零散散的知识点重新构成知识网。例如,《实数》这节课程教学的难 First, the use of existing knowledge of students to create situations At present, many junior high schools are using class teaching system, the class system is very easy to split the complete knowledge system into many fragments, the objective decomposition of the structure of knowledge , But also to disconnect the original mathematical logic. However, in practical teaching, if teachers can grasp the connection between new knowledge and old knowledge, and use the existing knowledge of students to introduce new lessons, teachers can make up for the damage caused by these man-made faults. Fragmented knowledge points to reconstruct the knowledge network. For example, “real number” this course teaching difficult