“两位数乘两位数”是整数乘法的核心内容。“核心”内容的“核心”作用能否得以充分地发挥,关键在于教师对教材的理解和处理。那么,教师如何理解教材、处理教材呢?概括地讲,就是使教师的“教路”、编者的“编路”和学生的“学路”“三路”合一,具体地说,可以从下述五个方面进行思考。一、揣摩教材的编排特点从教材的大体系看:北师大版教材打破传统教材“把乘数是两、三位数的乘法编入同册”的编排模式,将它们分散到六、七两册。显然,编者的意图在于:突 “Double digit by two digits ” is the core of integer multiplication. “Core ” content “core ” role can be fully played, the key lies in the teacher’s understanding of teaching materials and processing. So, how to understand the teaching materials, teaching materials? In a nutshell, is to make teachers “teaching ”, the editor “coding ” and the students “learning ” “three ” First, specifically, we can think from the following five aspects. First, to try to figure out the characteristics of choreography Textbook system from the general system to see: Beijing Normal University version of the textbook to break the traditional teaching material, “the multiplier is two or three digit multiplication into the same book,” the layout mode, they are scattered to six Seventy-two volumes. Obviously, the editor’s intention is: sudden