所谓同题异构就是多人备同一课题,然后分别组织教学,组内教师既是教学者,又是研究者.教师应该从同题异构活动吸取营养,享受着“异”的沐浴.笔者结合“菱形(1)”的教学为例谈谈自己如何在“异”中寻求最优设计的.一、课堂导入方式的“异”片断1:观察我们自己收集的有关菱形的图片,你能说说菱形的定义吗?片断2:在平行四边形中,如果内角大小保持不变,仪改变边的长度,使两邻边相等,那么这个平行四边形成为怎样的四边形? The so-called the same problem with different subjects is prepared by many people the same subject, and then organize the teaching, the group teachers are both teaching and research teachers should be absorbed from the same activity of heterogeneous activities, enjoying the “different ” bathing. The author of the “diamond (1)” teaching as an example to talk about how to find their best in the “First, ” First, the classroom Can you talk about the definition of rhombus for a picture of a diamond? Piece 2: In a parallelogram, if the size of the interior angle remains the same, the instrument changes the length of the edge so that the two adjoining edges are equal. What kind of quadrilateral is this parallelogram?