《数与形》是人教版九年义务教育第十一册P107第八单元《数学广角》的内容。作为教材新增的内容,我考虑最多的还是目标的定位问题。按照传统的教学,例2以及后面编排的几道习题都属于思考题甚至竞赛题,是供学有余力的学生学习的,对普通学生来说要求偏高。现在教材作为例题编写,在教学中究竟该达到怎样的要求还需进一步分析和把握。在以前的学习中,也曾出现过 “Number and form” is the content of “Mathematics Wide Angle” of the eighth unit of P107, the eleventh volume of the People’s Education Press’s nine-year compulsory education. As a new textbook, I consider the most is the positioning of the target. According to the traditional teaching, Example 2 and the following exercises are all thought questions or even competition questions, which are for the students who have spare capacity to learn. They are demanding for ordinary students. Now teaching materials as an example of preparation, in teaching what exactly to achieve what kind of requirements still need further analysis and grasp. In previous studies, there have been