数学教学中有这样一个现象越来越普遍的出现在我们的课堂上:课前预设与课堂生成不符。在备课过程中教师往往要根据教学内容进行教学预设,而由于新课程标准下的数学课堂开放性较强,在长时间的新课程理念浸润下,学生的学习更具有自主性、独立性和个性,学生在课堂上所体现出来的思维经常出人意表,超出教师对于课堂教学的预设,那么在 There is such a phenomenon in mathematics teaching that is more and more common in our classrooms: Pre-lesson presets do not match classroom production. Teachers often make teaching preconditions according to the teaching content during the lesson preparation process. Due to the openness of the math classroom under the new curriculum standards, under the long-term infiltration of new curriculum concepts, students’ learning is more autonomous, independent and Personality, students in the classroom reflected the thinking often surprising, beyond the teacher’s pre-set classroom teaching, then