初中数学从“解构”到“重构”的问题链教学设计

The Problem Chain Teaching Design of Junior Middle School Mathematics from“Deconstruction”to“Reconstruction”

分析当前初中数学问题链教学中存在的问题,并以浙教版八年级《数学》上册“从勾股定理到图形面积的拓展”为例,设计从“解构”到“重构”的问题链教学模式:创设情境,提出驱动问题;巧设体验,引发认知关联;演绎推理,促进抽象思维;迁移拓展,激发发散思维;归纳总结,提升认知维度.该教学模式可激发学生的学习兴趣,启发学生思考,引领学生深入挖掘新问题,从而提升学生的思维素养.

This paper analyzes the problems existing in the current teaching of mathematics problem chain in junior middle school,and takes“from Pythagorean Theorem to the expansion of graph area”,the first volume of the eighth grade“mathematics”edited by Zhejiang Education Press,as an example to design the teaching mode of problem chain from“deconstruction”to“reconstruction”:create the situation,putting forward driving problems;design experience skillfully,causing cognitive relevance;promote abstract thinking by deductive reasoning;stimulate divergent thinking by migration and expansion;improve the cognitive dimension by summarization.This teaching mode can stimulate students’interest in learning,inspire students to think,lead students to dig into new problems,so as to improve students’thinking quality.