有人曾经说,“教学是一门遗憾的艺术”。每当我看见《面积和面积单位》这个课题时,便会想起自己曾经在临洮二中的阶梯教室里讲过的那一节课,至今都觉得是一种遗憾。遗憾自己对教材的理解不透,把握不够;遗憾对学生的已有知识了解不够。总觉得学生对“面积”、“1平方厘米”、“l平方分米”、“1平方米”的理解只是停留在“知其然,不知其 Someone once said that ”teaching is a regrettable art.“ Whenever I see the topic of ”Area and Area Unit,“ I think it is a pity so far to recall the lesson I once mentioned in the lecture hall in Linqu two. Unfortunately, my understanding of the textbooks is not thorough enough, not enough; unfortunately, I do not know enough about the students’ existing knowledge. Students always feel that the understanding of ”area“, ”1 square centimeter“, ”square centimeter“, ”1 square centimeter"