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反思是一种习惯和意识,不断反思,才会不断进步。反思在教学活动中是一个非常重要的环节,它能使课堂教学成为探究性的活动,从而增强学生的思维能力。本文就中学数学《解三角形》第二节“余弦定理”第一课时的教学实践谈谈笔者的教学反思。一、以具体问题引入教学,利于学生探究本节内容“余弦定理”从知识与技能来看,它提供了在三角形中已知两边及其夹角,
Reflection is a habit and awareness, continuous reflection, will continue to progress. Reflection in teaching activities is a very important part, it can make classroom teaching as inquiry activities, thereby enhancing students’ thinking ability. This article talks about the author’s teaching reflections on the teaching practice in the second section of “Solving the Triangle” in the middle school mathematics “cosine theorem ”. First, the introduction of specific problems in teaching, which will help students explore this section “cosine theorem ” from the knowledge and skills point of view, it provides the triangle in the known sides and their included angle,