人教版小学二年级数学上册第七单元是“认识时间”。这个单元的第一节课的教学难点是:用5分5分数的方法读取时间。上这节课之前,我向前两年教过本内容的教师进行了咨询。他们都有这样的感觉:在课前都对本节课进行了详细认真的备课,上课时实物、模型和课件都用上了,学生学习的积极性也不错。但是在检查学生对一节课的学习情况时,一些学生还会出现这样的错误:比如“7:50,学生写成7:10, PEPP grade two mathematics on the seventh unit is ”know time “. The teaching difficulty of the first lesson of this unit is: read the time with the method of 5 points and 5 scores. Before this class, I consulted teachers who had taught this content two years ago. All of them have the feeling that before class, they conducted a careful and detailed lesson preparation for this lesson. In class, all kinds of objects, models and courseware were used, and students’ enthusiasm for learning was good too. However, when examining a student’s learning of a class, some students also make such mistakes: for example, ”7:50, the student writes 7:10,