“动态生成”是新课程改革的核心理念之一,只有生成性的课堂才具有生命的气息,才能发挥学生的主体性,满足学生探求知识的欲望,展现课堂教学的真实性,体现教师的教学机智和教学艺术,表现数学学科自身动态生成的特点。成功的课堂教学离不开教师富有创见的预设,但总是拘泥于教师的预设未 “Dynamically Generated ” is one of the core concepts of the new curriculum reform. Only in the generative classroom can it have the breath of life, so as to bring the students’ subjectivity into full play, meet the desire of students to seek knowledge, demonstrate the authenticity of classroom teaching, Teaching wit and teaching art, the performance of mathematics itself dynamically generated features. Successful classroom teaching is inseparable from the teacher’s creative ideas, but always rigidly adhere to the teacher’s default