有幸聆听了特级教师吴正宪执教的观摩课“分数的初步认识”,吴老师在课堂中引导学生动手实践的做法,给笔者留下了深刻的印象。吴老师在让学生想办法表示出一半后,接下来让学生折出一张纸(有长方形纸片或正方形纸片)的二分之一。不一会儿,学生已经有所收获,纷纷要求展示自己的实 Fortunate enough to listen to supervisor Wu Zhengxian coaching observatory “a preliminary understanding of scores,” Wu teacher in the classroom to guide students practice practice, left a deep impression on the author. After Mr. Wu showed his students half the solution, he then asked the student to fold one-half of a piece of paper (with rectangular or square paper). In a few moments, students have reaped some strength and demanded to demonstrate their own reality