高中英语 Module 4　Sandstorms in Asia Period 5教案 外研版必修3

专心 爱心 用心1 PeriodPeriod 5 5 Writing Writing EverydayEveryday EnglishEnglish 整体设计整体设计 教材分析教材分析 本节是写作课 学生通过阅读文章可以学习如何描述相关话题 环境问题是英语课中 常见的话题 也是当前的热点话题 学生在本节课中学习描述环境污染问题并提出应对办 法 通过阅读和听说 学生的写作离不开前面的学习 分组讨论和单独写作过程将使学生 能够形成写作成果 因此教师可以选择部分较好的作文在课上展示 而后面的日常英语表 达会令课堂轻松一下 三维目标三维目标 1 知识与技能 1 Make students learn to write a paragraph describing environmental problems 2 Make students practice some useful expressions 2 过程与方法 1 Make students learn how to use some simple Everyday English in a conversation 2 Through the analysis of the steps in writing a short paragraph about environmental problem students may learn some strategies on describing environmental problems 3 情感与价值 Through the study of this period ask students to love our only earth and protect environment 教学重点教学重点 Learn to describe one environmental problem 教学难点教学难点 1 Use what we have learned to give some solutions 2 How to express what we are thinking about 教学方法教学方法 Practice drinks are increasingly sold in bottles or tins which cannot be reused This not only causes a litter problem but also is a great waste of resources in terms of glass metals and paper Advertising has helped this process by persuading many of us not only to buy things we neither want nor need but also to throw away much of what we do have Pollution and waste combine to be a problem everyone can help to solve by cutting unnecessary buying over consumption 消费 and careless release of the products we use in our daily lives Step 2 Writing 1 Option One Lead in 1 Collect the names of types of environment pollution Students can give a lot on this problem The teacher can collect the answers on the blackboard SuggestedSuggested answers answers water pollution air pollution noise pollution desertification garbage in everyday life 2 Give an introduction about the serious pollution you think Suggestions 1 what you are worried about 2 the present serious condition 3 cause and result 4 present your solution Option Two Sample In this period we ll describe an environmental problem and say what we should to about it Maybe it s a little bit difficult for you So you can follow the steps and example on Page 38 Show a sample NaturalNatural DisasterDisaster EarthquakeEarthquake An earthquake is caused by a sudden slip on a fault 断层 A fault is a fracture 断裂 in the crust 地壳 of the earth along which rocks on one side have moved relative to those on the other side Stresses in the earth s outer layer push the sides of the fault together builds up and the rocks slips suddenly releasing energy in waves that travel through the rock to cause the shaking that we feel during an earthquake Earthquakes tend to be concentrated in narrow zones There are 7 major crustal plates on earth about 80 km 50 miles thick all in constant motion relative to one another They move at between 10 and 130 mm from less than one half to 5 inches per year 专心 爱心 用心3 It is estimated that there are several million earthquakes in the world each year Many of these earthquakes go undetected because they occur in remote areas or have very small magnitudes 震级 The USGS Earthquake Info Center locates 12 000 to 14 000 earthquakes each year about 35 per day On average about 60 earthquakes per year are classified as significant with 19 classified as major A significant earthquake is one of magnitude 6 5 or higher or one of lesser magnitude that causes casualties or considerable damage Major earthquakes have a magnitude larger than 7 0 2 Ask students to read through the steps on Page 38 with the whole class and ensure them to know what to write down next And discuss the structure of their short passage First briefly describe the problem with a partner taking down notes and key words Then give students about 15 minutes to write down a short passage individually Try to use the suggestions given After that exchange their writing with each other to correct mistakes At last the teacher displays some excellent writing for the whole class to enjoy Some samples about this topic 1 1 Many students are taking part in the practice of improving the environment through selling used paper and planting trees They even set up a website to help others take practice in protecting the environment Although people care much about the environment problems but they don t know how So some organizations also published measures to encourage public participation in environment protection The measures tell us what we can do to protect the environment We surely cared much about the environment protection but didn t do much Actually there is much we can do in our daily life Buy less to reduce waste Don t throw away things before we have made the most use of them Use electricity water and gas only when necessary Switch them off when we don t need them Everyone can participate in making the planet suitable for future generations Everybody can join in and make our world more fantastic Just do it 2 2 Besides giving off gases and dusts into the air humans produce waste that is poured on the environment Often this waste produced by major industries and people is harmful to both nature and human life Every year major health problems result from dangerous waste Sadly it is often only after someone has died or become seriously ill that the governments will take measures to reduce levels of harmful waste Some governments have realized how serious the dangerous waste problem is and are now trying to settle this problem They are also trying to limit the amount of waste industries are allowed to produce 专心 爱心 用心4 Not only governments but ordinary people as well must work together to solve the problem They can choose not to buy those products which require the production of dangerous waste and produce less harmful waste themselves Many scientists think that waste production can be cut The waste can be reduced by at least one third using existing technologies and methods Step 3 Everyday English While learning English we usually encounter some confusing expressions If we don t know their meanings we ll misunderstand the speaker So it s important for us to learn Everyday English There are some expressions for you to learn Choose correct answers for each sentence 1 in a nutshell means A in my opinion B to explain something very simply 2 It s scary means A It s frightening B It s interesting 3 I ll do my best means A This is the best explanation B I ll try as hard as I can 4 From what I understand means A This is what I understand B I think I understand 5 You re absolutely right means A You re completely right B You re almost right SuggestedSuggested answers answers 1 B 2 A 3 B 4 A 5 A Step 4 Summary and Homework In this period we first did some writing about describing environmental problems In Everyday English we learned some useful expressions Homework Write a short passage trying to use the useful expressions we have learne