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一、案例概述本案例选择“结识抛物线”(北师大版九年级上册)一节,在授课过程中,通过学生动手画图像与几何画板演示生成图像相结合,抽象出y=ax~2(a≠O)的图像与性质,让学生在直观学习的过程中体会函数图像之间的关联、性质.同时感受数字化教学和网络工具的应用价值。本课例因为利用了几何画板,使得函数图像这部分内容的课堂教学时间大大缩短,提高了课堂效率。传统的课堂上,学生用列表、描点、连线的方法做出y=ax~2(a≠0)的各种图像,浪
First, the case overview In this case, select “Get acquainted with the parabola” (Beijing Normal University version of the ninth grade on the volume) section, during the lecture, through the student hand-painted images and geometric drawing board to generate images combined with abstract y = ax ~ 2 (a ≠ O) of the image and nature, so that students in the process of intuitive learning to understand the relationship between the function and nature of the image at the same time experience the value of digital teaching and network tools. This lesson because of the use of geometric drawing board, making the function of this part of the contents of the classroom teaching time greatly reduced, improving classroom efficiency. In the traditional class, the students make various images of y = ax ~ 2 (a ≠ 0) by means of list, drawing point and connection