Unit 22 Lesson 3（北师大）.docx

北京师范大学出版社 (选修八) 畅言教育Unit 22ENVIRONMENTAL PROTECTIONLesson 3 Natural Disasters 教材分析This unit is about environment. Natural Disasters is the last lesson of Unit 22. It discusses environmental problems. 教学目标【知识与能力目标】1. To practice reading strategies to complete texts with sentence gaps.2. To talk about disasters with the help of the learnt vocabulary about/concerning natural disasters.【过程与方法目标】To helpthestudents improvetheirreadingandspeakingabilities.【情感态度价值观目标】To make the students the real masters in class and develop the students awareness of self-learning. 教学重难点【教学重点】1. To help the students learn and master some useful words and phrases.2. To help the students improve their reading and speaking abilities by scanning and skimming.【教学难点】To practice justifying arguments. 课前准备 Tape recorder, Multimedia 教学过程Step 1: Lead inShow some pictures. And prepare active vocabulary for learning the passage.1.grand adj big and very impressive巨大的2.scale n the size or level of sth规模，大小3.separation n the condition of being separated分离，分开.4.rough adj unpleasant or difficult艰难的5.mountainous adj having many mountains多山的6.slip v fall off 滑落7.slide v to move smoothly over a surface滑行 8.landslide n sudden fall of a lot of earth or rocks down a hill, cliff 滑坡，山崩 9.shabby adj old and in bad condition 破烂的10.construct v build 建造Step 2: Task Learn more about Natural Disasters and their causesBesides earthquake, there are many natural disasters, can you name some? Look the pictures and answer what kind of disaster is it?Then read aloud and memorize themFurther Exploration: What do you think causes the disasters, people or nature? Check your predictionStep3 Reading1.Read the text to get general idea.Natural disasters are getting worse because of human activities.2.Read a paragraph with a sentence gap and identify the topic, e.g disasters .3.Read the text again and answer these questions.1). What is the attitude of the journalist towards the future ? Pessimistic. 2). Who are most likely to be the victims of natural disasters? Poor people.3). Why are there now more hurricanes, floods and droughts ? Overpopulation and industrialization.4). Why are volcanoes and earthquakes more dangerous now ? A big population in cities (or urbanization)5). What could be the biggest threat to the planet in the future? A volcanic eruption. 6). What effects might this threat have? Low temperature (A freezing weather).Step 4: Text summaryFill in the blanks about the text.In the last _ years , there are more and more disasters such as _ , _, thunderstorms, earthquakes, _, volcanic _and _ fires all over the world. Why are so many disasters ? One of the reasons is over- _. _ addition, _ change and global _ caused by factories, vehicles and deforestation can lead _ the disasters or make them worse. At present, volcanoes and earthquakes are more _ with the fast _ of people . Earthquakes take the lives of 1.6 million people in the last hundred years. What is worse, the disaster experts predict that the things will get _.Homework1.Read the passag