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二次函数是中学应用广泛的初等函数,曾经是初中阶段学生的重点,由于初中的教学要求仅限于作图,确定函数解析式;随着函数概念和性质学习的不断深入,对其考查更为深远,高中教材又没有单列,因此如何处理这段内容是教者值得重视和研究的.文[1]、[2]从比较初中与高中学习的差别和高中阶段渗透教学的时机作了分析,笔者在教学中也赞同集中分散,见缝插针,循序渐进,逐步深入的处理方式,并结合高一教材第二章内容编排顺序,抓住函数图象这一主线来处理这部分内容.1 章节处理,把住图象脉搏高一教材第二章《函数》研究了函数内容的一式(解析式)、一图、二域(定义域、值域)、一性(单调性).在教学时,适当、适时、分散添加二次函数的例习题,
The quadratic function is a widely used elementary function in middle school. It used to be the focus of junior high school students. Because the teaching requirements of junior high school are limited to the drawing, the analytic formula of function is determined. With the deepening of the study of function concept and nature, Far-reaching, high school teaching materials are not separate, so how to deal with this content is worthy of attention and research of the text.Wen [1], [2] from the comparison of junior high school and high school learning differences and the infiltration of high school teaching time, The author also agrees with the teaching in the decentralized, seams, step by step, step by step in-depth approach, combined with the textbook in the second chapter content arrangement sequence, seize the main function of the line to deal with this part of the content.1 chapters deal with Live high pulse image of a second chapter “function” to study the function of the content of a (analytic), a map, two domains (domain, range), a (monotonic) .In teaching, appropriate, Timely, decentralized to add quadratic function example exercises,