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最近,笔者参加了本学区组织的同课异构研讨活动。两位六年级老师讲的是冀教版数学“圆柱的侧面积”一课。在探究圆柱的侧面积时,杨老师先是出示
Recently, I participated in the school district heterogeneous seminar with the same class. Two sixth-grade teachers are talking about Ji mathematics version of “cylinder side area ” class. In exploring the side of the cylinder area, Mr. Yang first show