十年前的冬天,在北京某中学,带着抑制不住的紧张与激动,我第一次踏上了向往已久的三尺讲台。这堂课试讲的是《抛物线的简单几何性质》,无论是基本概念的阐述,还是解题技巧的展示,我都感觉发挥自如。看着台下的同学几分羡慕的小眼神,我想结果应该是毫无悬念的“优秀”吧。我长吁一口气走下台,准备迎接鲜花与掌声,忽然有个听课的老教师朝我走来,热情地和我打招呼说:“同学,能聊下吗?”我有些困惑地点点头望着他。 Ten years ago in the winter, in a Beijing middle school, with uncontrollable tension and excitement, I first set foot on the long-awaited three-foot platform. This class lectured on “Simple Geometrical Properties of Parabola.” I feel comfortable with both basic concepts and the presentation of problem-solving techniques. Looking at the small eyes of the students in the audience, I think the result should be “excellent” with no suspense. I called for a walk to get ready for flowers and applause. Suddenly there was an old teacher who was coming to me and greeted me warmly and said, “You can talk under my classmates?” I looked at some confused points. With him.