此刻,在北郊区宜兴埠乡的小礼堂里,正上着一节数学观摩课。尽管寒冷的东北风从那堵塞不严的窗孔、门缝里钻了进来,来自市、区、县的教育同行们却那样聚精会神。讲台上,宜兴埠小学的邸广惠老师以她清晰的讲述、板书,恰当的提问、演示,吸引着在场的每个人。这是一节“圆锥体积”的教学,难度较大,邸老师就发 At the moment, in the small suburb of Yixing Bu Township in the northern suburbs, there is a math class. Although cold, northeasterly winds came in through the cracked windows and doors, education colleagues from cities, districts and counties were as attentive as ever. On the podium, Di Guanghui from Yixingbu Elementary School told everyone with her clear statement, written proposal, proper questioning and presentation. This is a section of “conical volume” of teaching, more difficult, teachers send Di