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“问题探究”是高中数学新课程倡导的一种教学模式,“问题探究”有助于学生了解数学概念和结论产生的过程,体验数学探究的乐趣,提高发现问题、解决问题的能力。课程改革以来,围绕“问题探究”有过不少讨论,讨论的焦点都集中在其有效性上,那么,什么样的“问题探究”才有效呢?下面,笔者以某教师执教的《余弦定理》(人教A版高中数学教材必修5)探究尝试课为例,就“问题探究”的有效性谈些看法。片段1:教师通过幻灯片展示问题:甲离学校10千米,
“Inquiry ” is a kind of teaching mode advocated by the new high school mathematics curriculum “Inquiry ” helps students to understand the process of mathematical concepts and conclusions, to experience the fun of mathematical inquiry, to improve the discovery and solve problems ability. Since the reform of the curriculum, many discussions have been held around “question exploration” and the focus of discussion has been on its validity. So what kind of “question exploration” is effective? In the following, the author is taught by a certain teacher “Cosine theorem” (to teach A version of high school mathematics textbook compulsory 5) to explore the lesson as an example, on the “question to explore” the validity of some comments. Fragment 1: The teacher shows the problem through the slide: A away from the school 10 km,