《义务教育数学课程标准》中指出:“学生的数学学习内容要有利于学生主动地进行观察、实验、猜测、验证、推理与交流等数学活动。”“有效的数学学习活动不能单纯地依赖模仿和记忆,动手操作、自主学习探索和合作交流是学生学习数学的重要方式。”多年来,我校一直致力于数学课堂教改实践,并以新课程理念为指导确立了以“讲学稿”为备课模式,“先学后教,当堂训 ”Compulsory education mathematics curriculum standards,“ pointed out: ”Students’ mathematics learning content should be conducive to students take the initiative to observe, experiment, guess, verification, reasoning and communication and other mathematical activities. “ ”Effective mathematics learning activities can not be simple Depends on the imitation and memory, hands-on operation, independent study and exploration and cooperation and exchange is an important way for students to learn mathematics. “” Over the years, our school has been committed to the practice of teaching reform in mathematics and the new curriculum concept as a guide to establish a “ Lecture ”for the lesson preparation mode, " first learn after the church training