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中吸取经验,提高课堂教学效果.笔者以《菱形(1)》的教学为例,谈谈自己是如何从同题异构中寻求最优设计的.一、课堂导入方式的“异”片段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?片段2在平行四边形中,如果内角大小保持不变,仅改变边的长度,使两邻边相等, The so-called the same problem is the same problem with more than one person prepare the same subject, and then organize the teaching, the group teachers are both teaching and research teachers should be from the same activity with different activities to improve the classroom teaching effect.The author of “diamond (1) ”teaching as an example, to talk about how to find the best design from the same problem Heterogeneous structure.“ First, the way the classroom into the ”different" fragment 1 Observe our own collection of diamond-related images, you Can we talk about the definition of diamond? Fragment 2 In a parallelogram, if the size of the interior angle remains the same, just change the length of the edge so that the two adjacent edges are equal,