图形是一种重要的数学语言,既是学习的对象,也是学习的工具。“间隔排列”一课运用形象的图形语言,建立抽象的规律模型,为学生今后探索更多规律积累了经验。数学学习的本质和结果是模型化。学生学习的过程总是循着“具象”操作到半具体、半抽象的“表象”操作,最后达到“抽象”操作的结果。借助图形,建立模型,运用模型进行抽象,可以帮助学生更好地抵近规律的 Graphics is an important mathematical language, both learning object, but also learning tools. “Arrangements at intervals ” The lesson uses the graphic language of the image to establish the abstract model of law, which has accumulated experience for students to explore more laws in the future. The essence and result of mathematical learning is modeling. The process of student learning always follows the operation of “figurative ” to the semi-specific and semi-abstract “appearance ” operation, and finally reaches the result of “abstract ” operation. With the help of graphics, model building and model abstraction, students can be better able to approach the law