这里的“同文异构”是指针对同一个文本,几位教师制定的不同的教学策略和学习目标,以不同的处理角度进行教学,呈现出有差异的教学案例.下面介绍三位老师的三种不同的教法,同时谈谈笔者对此的比较和感悟.一、课题:平行四边形的判定本节课是在学习了平行四边形的定义及性质定理的 The “same content isomerism” here refers to different teaching strategies and learning objectives formulated by several teachers for the same text. Teaching is performed in different processing angles and presents different teaching cases. The following describes the three teachers’ three. Different kinds of teaching methods, at the same time talk about the author’s comparison and perception of this. First, the subject: the determination of the parallelogram This lesson is to learn the definition of the parallelogram and the property theorem