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函数的“数、式、形”三者的相互转换,对学生的智力水平与认知水平要求较高,一直是初中数学教学的一大难点。传统的教学多用手工画图像,既费时又无法精准,学生要以“静态”的图像来理解“动态”的变化,难度大,效果差。几何画板的功能强大,应用于初中的函数教学,具有突出的三大优势:一是高效直观,二是化静为动,三是交互可控。几何画板是函数教学的有效工具。
The transformation of the “” number, type, form “of the function has high requirements on students’ intelligence level and cognition, which has always been a major difficulty in junior high school mathematics teaching. Traditional teaching is more time-consuming and inaccurate than manual painting. Students should understand the change of ”dynamic“ with ”static" images, which is difficult and ineffective. Geometric Sketchpad powerful, applied to function teaching junior high school, has three prominent advantages: First, efficient and intuitive, and second, static and dynamic, the third is interactive and controllable. Geometric drawing board is an effective tool for function teaching.