《义务教育数学课程标准》根据儿童发展的生理和心理特征,将义务教育的学习时间具体划分为三个学段。三学段的具体划分清楚地揭示了数学教学过程的阶段性,但三阶段的教学是一个密切联系的有机整体,是一个阶段性的、循序渐进和螺旋上升的推进过程。相对于其他学科而言,数学学科每个学段的联系更为紧密,衔接更为重要,前一学段对后一学段有直接的影响。第二学段承上启下尤为重要,而不少学生从第二学段进入第三学段之后,在学习 According to the physical and psychological characteristics of children’s development, compulsory education math curriculum standard is divided into three sections. The specific division of the three sessions clearly reveals the stage of the mathematics teaching process, but the three stages of teaching is a closely integrated organic whole, which is a phased, gradual and spiraling advancing process. Compared with other disciplines, math subjects each segment more closely linked, the connection is more important, the first one has a direct impact on the latter. It is particularly important that the second semester be accepted, and quite a few students have entered the third semester from the second semester and are studying