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教学实践中,初中数学课堂引入一般有以下几种形式:1.复习提问式我们都注意到旧的知识的复习须是学习新知识的基础,起到为新知识学习搭桥的目的。例如:江苏科学技术出版社八年级数学(上册)将学习反比例函数的学习安排在学习正比例函数的后面,那么在学习“反比例函数的图像”这一课时的时候,通过如下的问题来引入:同学们,你还记得一次函数的图像吗?你还会画出它们吗?然后在数轴上画出两个不同的函数图像,在回忆和交流后,进一步认识函数的图像的直观有助于理解函数的性质,转而导入关注的函数——反比例函数的图像研究:反比例函数的图像又会是什么样子呢?
In the teaching practice, the introduction of mathematics classes in junior high schools generally has the following forms: 1. Review Questioning We all notice that the review of old knowledge must be the basis for learning new knowledge and serve as a bridge for learning new knowledge. For example, the eighth grade mathematics of Jiangsu Science and Technology Publishing House (Volume 1) will arrange the learning of the inverse proportional function behind the learning proportional function, and then when learning the “image of the inverse proportional function”, the following problems will be introduced: : Students, do you still remember the image of a function? Can you draw them out? Then draw two different functional images on the axis. After the memories and exchanges, further understanding of the function’s image will help Understand the nature of the function and instead import the function of interest - the image study of the inverse proportional function: what would the image of the inverse scale function look like?