心理学家布鲁纳说过:“对于所获得的知识来说,如没有天衣无缝完满的结构将其联系在一起,这些不连贯的知识最终的命运是被遗忘,且在记忆中的寿命短的可怜。”数学知识也是如此,没有形成连贯结构的知识是不能长久地被学生记忆的,教师还需设定单元复习环节让某阶段所学的知识集中起来,成为一个知识结构体系,凝结在学生的头脑中,得以有效避免因知识的分散导致瞬间遗忘。此外,在进行知识相互联系、归钠,建立知识网的过程中,学生的数学思维能力也一点点形成,这为接下来的数学学习奠定了知识和思维的双层基础。在单元复习中,教师要遵从由点到线再到面的原则步骤进行,让学生对这一单元所学的知识点进行回忆,找到这些零碎、分散的知识点,然后 Bruenor, a psychologist, said: “For the acquired knowledge to be connected without perfect and seamless structure, the ultimate fate of these incoherent knowledge is forgotten and has a short life span in memory Poor ”." The same is true of mathematical knowledge, without the formation of a coherent structure of the knowledge can not be long-term memory of students, teachers also need to set the unit to review aspects of a certain period of knowledge gathered to become a knowledge structure, condensation In the student’s mind, can effectively prevent the spread of knowledge lead to an instant forgetting. In addition, students’ ability of mathematical thinking is also formed a little in the process of knowledge intercourse, return to sodium and establishment of knowledge network, which lays the double foundation of knowledge and thinking for the following maths learning. In the unit review, teachers follow the principle steps from point to line to surface, let the students recall the knowledge point of this unit, find these fragmented and scattered knowledge points, and then