这是一堂全市的数学优质课,一位女教师正在上有关“圆”的内容。虽然头发已有些花白,身材消瘦,脸上的皱纹很深,背也佝偻得厉害,但讲课的声音却是洪亮清晰,抑扬顿挫:教程安排得严密有序,准确科学;教学方法具有独创性,课堂气氛和谐融洽。听课的老师都露出赞赏、敬佩的表情。然而,更让我注意的是她在黑板上画圆根本不用圆规直尺,而是随手拿起粉笔顺手一圈一勾,一个圆满的圆使凸现在黑板上。我也是教几何的,画过的圆也该数不清多少个了 This is a city math quality class, a female teacher is on the “round” content. Although the hair has some gray, thin body, deep wrinkles on his face, back is also very powerful, but the voice of the lecture is loud and clear, cadence: the arrangement of the tutorial was tight and accurate science; teaching methods are original, classroom Harmonious atmosphere. Learners of teachers have shown appreciation, admired expression. What made me notice more, however, was that she did not need to use a compasses to draw a circle on a blackboard. Instead, she picked up the chalk smoothly and smoothly. A perfect circle made her appear on the blackboard. I also teach geometry, the number of painted circles also countless number