1引言随着变式教学在理论和实践层面所取得的长足进展,“变式”逐渐成为教科书在选取和安排学习素材时要考虑的重点之一.章建跃老师指出:“我们非常重视利用教师的教学经验,包括利用变式教学的实践成果,改进教科书中的学习素材选择、数学活动设计以及习题的设计等,教科书中应用变式素材已经成为一种常态.”[1]与此同时,教科书也成为教师选取变式素材的主要来源之一,一项关于教师使用教科书变式素材频度的调查发现,56名教师中,有13位教师表示总 1 Introduction With the tremendous progress made at the theory and practice levels of variant teaching, the “variant” has gradually become one of the focuses that textbooks should consider in selecting and arranging learning materials. “Teacher Zhang Jianyue pointed out:” We attach great importance Using the teaching experience of teachers, including the practice of using variant teaching, improving the selection of learning materials in textbooks, the design of mathematical activities and the design of exercises, the use of variant materials in textbooks has become a norm. At the same time, textbooks have also become one of the main sources of teachers’ choice of variant materials. A survey on how often teachers use textbooks has found that of the 56 teachers, 13 said