一位教师教一年级“减法”开头课时,将课本中反映求剩余数量关系的“主题图”放大,挂在黑板上,对照这幅图进行启发谈话:“小朋友,请大家仔细地看一看.这幅图里画了那些东西?这幅图里面讲了一件什么事情?”学生纷纷举手发言.一个学生说:“这幅图里面画的是飞机,停了两架,飞走一架.”教师感到这样的回答不能令人满意,又让另一个学生回答,结果答话意思雷同.再换一个学生回等,答语仍无新意.这时,教师十分着急,只得反复要求学生一看再看,但学生依然看不出新花样.出于无奈,教师只好 A teacher to teach the first grade “subtraction ” the beginning of the class, the textbook to reflect the relationship between the remaining number of “theme ” zoom in, hanging on the blackboard, contrast to this picture inspired conversation: “children, please everyone Have a look at the picture carefully. What did the picture draw? What did one say in the picture? ”The students all raised their hands and said:“ This picture shows the plane, stop Two, flew one. ”The teacher felt such an unsatisfactory answer, let another student answer, answer the same meaning of the same answer.Another student back and so on, the answer is still nothing new .At this time, the teacher Very anxious, had repeatedly asked the students to look at it again, but students still can not see the new tricks. Out of frustration, the teacher had better