课上到一半,我发现部分学生已经趴在桌面,神情迷茫。我无奈地笑了下,继续往下讲。不经意之间,我把小石头随意一放,然后对学生说:“下面我们开始进行称量。”正准备放砝码的时候,有几个学生开始一阵议论的声音,接着一个学生小声地对我说:“老师,小 Halfway through the class, I found that some of my students were lying on the table with a confused look. I laughed helplessly, continue to talk down. Inadvertently, I put the little stones at random, and then said to the students: ”Now we begin weighing. “ When preparing to put weights, a few students began a burst of discussion of the voice, then a student whispered Said to me: ”Teacher, small