好多年前,曾经听张齐华老师执教的《轴对称图形》,那堂浸润着数学思想、数学文化的课让我有一种耳目一新的感觉,至今仍清晰地记得课中那些精美的轴对称图形。最近又有机会听到张老师的课,经过几年的磨砺,张老师的课越发于朴素中见精彩、于平常处见深邃。仅凭我不加深入的思考,无法说出张齐华老师在他的数学课堂中想要呈现和展示的思想。只能摘录其中的片断记录下来,并把我的听后浅思一一呈现。 Many years ago, I had listened to the “axisymmetric graphics” taught by Teacher Zhang Qihua. The lesson that infiltrated mathematics and mathematics culture gave me a refreshing feeling. Still, I remember vividly the beautiful axisymmetric graphics in my class. Recently, I had a chance to hear Teacher Zhang’s lessons. After several years of sharpening, Ms. Zhang’s classes grew more and more beautiful and simple in my simplicity. It was impossible for me to express the ideas that Teacher Zhang Qihua wanted to present and display in his math class just because I did not deepen my thinking. Only excerpts of which pieces are recorded, and after I listen to shallow superficial presentation.