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“几何直观”是2011年新课标提出的新增核心概念,要求教师在课堂教学中借助几何直观,把复杂的数学问题变得简单、形象,帮助学生依托、利用图形进行数学思考和想象,依此找到思路,建构问题解决的策略。现以《认识分数》教学为例,谈谈几何直观在课堂教学中的运用。一、搭建桥梁,建构分数模型本节课是三年级分数知识的延续。根据苏教版教材的安排,三年级知识安排的是一个物体或者图形的几分之一
“Geometric Intuitive ” is a new core concept put forward by the new curriculum standard in 2011. Teachers are required to make complicated mathematics problems simple and vivid in class teaching by means of geometric intuition, help students to make use of figures for mathematical thinking and Imagine, find ideas and construct strategies for problem solving. Now take the “cognitive score” teaching as an example, to talk about the use of geometric intuition in classroom teaching. First, build a bridge, building a score model This lesson is a continuation of third-grade score knowledge. According to the Sujiao version of the textbook arrangement, third-year knowledge of the arrangements for a few objects or graphics