注重过程的教学才是有效的教学——以y=asinx+bcosx的教学片段为例

• 作 者: 董海涛
• 机 构: 安徽省阜阳市第三中学,
• 出 处: 中小学数学(高中版)
• 发表日期: 2011年05期
• 关键词: 教学片段 y=asinx+bcosx 数学思维能力 示范高中 恒等变换 二倍角公式 第一课 情况简介 积化和差 算术平方根

1.教学案例在某市级示范高中举行的“公开教学周”上,笔者“推门”听了一节课.听课时的感受、对学生的测评以及课后与执教教师的交流,都引起了笔者的反思:到底怎样的教学才是有效的教学.1.1基本情况简介A教师执教的班级学生基础尚可,但数学思维能力欠佳;教学内容是人教A版必修④第三章《三角函数恒等变换》的第3.2节《简单的三角恒等变换》第一课时.1.2教学过程简录A教师首先复习回顾了“两角和与差的正弦、余弦

1 teaching case In a city-level demonstration of high school held ”public teaching week “, the author ”push the door “ heard a class .Classification of the feelings of the students evaluation and after-school coaching teachers Exchange, have aroused the author’s reflection: in the end what kind of teaching is effective teaching .1.1 basic situation brief introduction A teacher coaching class student foundation is acceptable, but poor mathematical thinking ability; teaching content is taught A version compulsory ④ Section 3.2 ”Equal Transformations of Trigonometric Functions“ Section 3.2 ”Simple Trigonometric Identities Transformation“ Lesson 1 .1.2 A Brief History of Teaching A teacher first reviews the ”sine and cosine