一、教材分析本课教学内容选自第三单元“只有一个地球”中的第一课《地球在哭泣》。本课教材由“人口太多了”和“环境太差了”两部分组成,用5课时完成教学内容。通过本课的教学,让学生了解地球以它博大的胸怀和无偿的赐予,养育了我们人类。但是近几百年来,由于人口的飞速增长,工业化、城市化的进程加快,使得地球的承载能力接近极限。由此产生 First, the textbook analysis The teaching content is selected from the third unit “Only one Earth” in the first lesson “The Earth is crying.” The textbook consists of two parts, “too many people” and “too bad environment”, with 5 hours to complete the teaching content. Through the teaching of this lesson, we help our students to understand that the earth nurtures our humankind with its broad mind and free gifts. However, in recent centuries, due to the rapid population growth, the process of industrialization and urbanization has accelerated and the carrying capacity of the earth has been brought to the limit. As a result