一、导入师:同学们,今天我们学习第18课《沙漠中的绿洲》。指名概括全文主要内容。【设计意图】课堂伊始,引导学生概括全文的主要内容,既是对前一课时学习内容的回顾,也是对全文的整体感知,同时也体现了中年级学段的教学重点。二、教学“沙漠”师:请同学们找找文中具体描写沙漠的句子。预设一:“从飞机上往下 I. Introduction division: Students, today we learn Lesson 18 ”Oasis in the desert.“ Name the main contents of the full text. [Design intent] At the beginning of the class, the main content guiding students to summarize the full text is not only a review of the learning content of the previous lesson, but also the overall perception of the full text, as well as the teaching focus of the middle school grade. Second, teaching ”Desert “ division: Please find the text of the students to find the specific description of the desert sentence. Default one: ”From the plane down