1教材本次活动课是根据北京师范大学出版社出版的、义务教育课程标准实验教科书数学八年级(下册),在学生学习了相似三角形的判定条件和性质的条件下进行的.2设计理念传统的课堂教学过于注重结论的教学,特别是几何方面,为了应付考试,只让学生记住一些重要的数学公式、结论,运用 1 Textbook The activity lesson is based on the eighth grade mathematics (Volume 2) of the textbook for experimental mathematics of compulsory education curriculum standard published by Beijing Normal University Press. It is conducted under the condition that students learn the conditions and nature of similar triangles. The traditional classroom teaching places too much emphasis on the teaching of conclusions, especially in terms of geometry. In order to cope with examinations, students are only reminded to remember some important mathematical formulas and conclusions.