一、现象某次外出听课 ,执教者是一位年岁稍长的同志 ,课上得沉稳老练。但由于一时疏忽 ,一连在黑板上写错字 ,而这几个错字却“明目张胆”地一直挂到课后 ,竟没有一个同学指责它的不对之处。回来之后 ,我有意在班上做了个同样的实验 :事先邀请了几位同事到场听课 ,在进行板书 First, the phenomenon of a class to go out to teach, coaching is a slightly older comrades, class calm sophisticated. However, due to a moment of negligence, a series of typos was written on the blackboard. However, these typos were hung “flagrantly” after class, and none of the students accused it of being wrong. Came back, I intend to do the same experiment in the class: a few colleagues invited to attend the class beforehand,