《数学课程标准》提倡“以学生为学习的主体;既重视学习的结果,更重视知识形成的过程”。课堂教学中,教师既要精心预设教学中的每个环节,又要重视课堂中的生成,并巧用生成,演绎课堂精彩。因此,在教育“以生为本”的今天,教学应该充分重视预设与生成。作为一线数学教师,更应该努力探寻教学中预设与生成之间的平衡点,让精彩的数学课 “Mathematics Curriculum Standard” advocates “students as the main body of learning; not only pay attention to the results of learning, pay more attention to the process of knowledge formation ”. Classroom teaching, teachers should not only carefully pre-teaching every aspect, but also pay attention to the generation of the classroom, and clever use of generation, interpretation of class wonderful. Therefore, in the education “students-based ” today, teaching should pay full attention to the default and generation. As a first-line mathematics teacher, we should try our best to explore the balance between pre-setting and generating in teaching so that wonderful math class