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在学习轴对称图形时,大多数教师都是引导学生对称轴的图形是美的化身,引导学生从美的角度去认知轴对称图形,而忽略了轴对称图形的使用用处,如机翼如果不是轴对称它是存在安全隐患的。所以本次教学从这个实用性为入手点进行教学。一、课例展示1.观察研究,导入新课师:同学们,春天来了,大地被唤醒了,绿色的草地,鲜艳的花朵呈现在我们的面前。你看这时谁来了?课件展示,蝴蝶蜂拥而至。师:同学们,这只蝴蝶怎么样?
When learning axisymmetric graphics, most of the teachers are the avatars that guide the students’ symmetry axes. They guide the students to recognize the axisymmetric graphics from a beautiful perspective, while neglecting the use of axisymmetric graphics. For example, if the wings are not axes Symmetry it is a security risk. Therefore, this teaching from the practical point of teaching. First, the class demonstration 1. Observation and study, into the new class teacher: Students, spring is coming, the earth was awakened, green grass, bright flowers in front of us. Who do you look at this time? Courseware shows, butterflies swarmed. Teacher: Classmates, how about this butterfly?