课堂教学是达成教学目标的主要渠道,是学生求知、进取、成长的主要阵地.笔者认为,课堂教学必须考虑三个问题:其一、WHY——为什么而教?即教学目标的确立问题;其二、WHAT——教什么?即教学内容的选择问题;其三、HOW——怎么教?即课堂教学的实施问题.以下,笔者结合《二次函数图象(2)》(浙教版)的课例,谈谈具体的做法. Classroom teaching is the main channel to achieve the goal of teaching, is the main position for students to seek knowledge, progress and growth.I think, classroom teaching must consider three questions: First, WHY - why teaching? The establishment of teaching objectives; its Second, WHAT - what to teach? That is, the choice of teaching content; Third, HOW - how to teach? That is, the implementation of classroom teaching. Below, I combine the “quadratic function image (2)” The lesson, talk about specific practices.