(临上课前组织学生唱《春天在哪里》这首歌。)[点评:这首歌选得恰到好处。从现场效果来看,上课前的氛围营造得相当热烈,消除了学生在几百人面前上公开课的紧张情绪。同时,《春天在哪里》歌曲的主题,也暗含了本课“力在哪里”的教学内容!] (Before class, organize students to sing “Where is Spring?”) [Comment: This song is just right. From the field effect, the pre-class atmosphere was created very warmly, eliminating tensions among students in open classes in front of hundreds of people. At the same time, “Spring is where” the subject of the song also implies this lesson “Where is the power” teaching content!]