五年制小学语文第十册第 21课《詹天佑》是一篇讲读课文。按着作者的思路深入理解课文，通过具体事例体会詹天佑是“杰出的爱国工程师”，是本课的教学重点。课文中提到的“中部凿井法”和“人”字形线路，是学生理解的难点。为突出重点，突破难点，发挥学生主体作用，培养学生 Five-year primary school Chinese tenth volume 21 “Zhan Tianyou” is a text to read. According to the author's idea of ​​in-depth understanding of the text, through specific examples Zhan Tianyou is “outstanding patriotic engineer” is the focus of this lesson. The text mentioned in the “central drilling method” and “human” glyph line is difficult for students to understand. In order to highlight the key points, break through the difficulties, give full play to the role of students and train students