附：在深圳东方英文书院中学部 “ 创 新 杯 ” 教学大赛中授课获奖之教案底稿 —— 高二英语组 ● 黎桂华 2003 年 4 月 25 日 授课内容： Senior English Book 2 (A)/ Unit 9 Saving the Earth / Lesson 34 幻灯片（ 1 ）

PART 1: Understanding of the teaching material STATUS AND FUNCTION 1.This unit is about pollution. It is a focus of the whole world. This lesson is the second one of Unit 9. It is a passage about some serious problems the earth has. It is related to our daily life 2.This lesson is very helpful for the Ss to improve their reading comprehension ability and spoken English TEACHING AIMS AND DEMANDS 1. Knowledge objects 2.Ability objects 3.Moral objects 幻灯片（ 2 ）

Knowledge objects 1.To make the Ss know that now the earth has a lot of serious problems and people are causing a lot damage to the earth. And if people don’t stop polluting the world and pay more attention, the whole situation will be more and more serious. 2. To give a reinforced practice in the use of the past participle and some useful expressions, such as be fit for; turn----into----; in place and so on. 幻灯片（ 3 ）

Ability objects 1.Make the Ss the real masters in class while the teacher himself acts as the director 2.Train them with some effective learning methods to optimize the students’learning results. 3.To improve their reading comprehension ability. 4.To improve their written English. Moral objects 1. Enable the students to love our earth and the nature. 2. Encourage the students to do something to save and protect the earth and our environment. 幻灯片（ 4 ）

PART 2: Teaching key and difficult points TEACHING KEY POINTS 1.Input the passages as a whole: make the Ss grasp and understand the general idea of the passages as a whole. 2.Language communication A.Tell the main idea of the passages B.Practice the main idea of the passages C.Tell their own stories related to the daily life TEACHING DIFFICULTIES 1.The general idea of the passages especially the causes and results of different problems 2.Telling their stories about pollution 3.Thinking of some ways to save and protect our earth especially in our daily life. 幻灯片（ 5 ）

PART 3: Teaching Methods and Teaching Aids TEACHING METHODS: Five Steps Method Communicative Method Aural-oral Method with the help of the computer ＊ A lot of pictures and short videos about the causes and results of the three problems mentioned in this lesson will be shown on the screen with the help of the computer. TEACHING AIDS: computer; OHP(overhead projector); software; powerpoint 幻灯片（ 6 ） PART 4: Studying Ways 1.Teach the Ss how to be successful language learners. 2.Teach the Ss how to master the general idea and structure of a passage by reading it. 3.Teach the Ss how to write similar stories according to what they’ve learnt in this lesson.

PART 5: Procedure Step 1 Revision Check the homework exercises. Step 2 Lead-in 1. A song about the topic we’ll learn today “Earth Song” by Michael Jackson (Because it is too long, play it before the class begins.) 2. Some pictures.(show them to the Ss on the screen) Picture 1: an earth with a smiling face (she used to be happy) Picture 2: an earth with a crying face (she is said now). Then ask the Ss why she is sad now. 幻灯片（ 7 ）

3. Some more pictures in pairs as comparison Pair 1: the sea used to be clean and the beach is beautiful but now they are seriously polluted. Pair 2: green grass and thick forests but now only deserts left. Pair 3: the sky was blue and clear but now there are a lot of smoke in it and it is no longer blue and clear. 4. Some short videos about different kinds of problems the earth has, including the three mentioned in the lesson-earth problem, air pollution, and water pollution. 幻灯片（ 8 ）

Step 3 presentation The teacher’s brief introduction: Today we will deal with the three most serious problems the earth has——earth problem, air pollution, and water pollution. 1.Pre-reading silently Give the Ss a few minutes to go through the passage as quickly as possible and try to find out the causes and results of the problems. 2.While-reading Passage 1: a. Show the Ss a picture and ask what can be found in it. (The area of the desert of the world is very large and it growing every year.) b. A short video about desert. 幻灯片（ 9 ）

c. Question: What are the causes of the problem? Show some pictures to help the Ss to answer the question ( too many cattle→eat all the grass→nothing can grow→only desert left) (trees be cut down→no trees left to hold→blow---;wash---) 幻灯片（ 10 ） Passage 2: a.Show the Ss the following pictures. b.Questions: What can you see in the pictures? Why do these things happen? c.A short video about chemical rain d.Ask the Ss to explain the causes and results of chemical rain according to the video and with the help of the following pictures.

Question:how does chemical rain from? Picture1:smoke from factories Picture 2: smoke from cars e. Another reason for air pollution-serious accident Ask the Ss to tell the stories about the two most serious accidents. Passage 3: a.Show the Ss two pairs of pictures. b.Give the Ss a few minutes to find out the reasons for these changes. c.Show some pictures to help them. Picture 1: waste from factory Picture 2: waste from cities d. Another reason for water pollution-accidents Show them the picture 幻灯片（ 11 ）

3. After-reading 幻灯片（ 12 ） 1.Summarize the passage. Fill in the following form fact causes results earthdesert grow every year cattle; trees be cut down have less farm land air be polluted; chemical rain smoke from---; accidents forests be destroyed; fish be killed; do harm to people waterbe polluted; diseases waste from---; accidents living things be killed; have less drinking water; nowhere to swim

2. Choose the best answers. ① Which of the following statements is not true according to the passage? A.Farmers are increasing the numbers of their cattle. B.Farmers are limiting the numbers of their cattle. C.Heavy rains and strong winds are destroying the valuable soil. D.Fewer trees are left to hold the soil in place on the hillside. ② Air pollution doesn’t cause ______. A.the destroying of forests B.the killing of fish in lakes C.illnesses and injuries to people D.the spreading of clouds of radiation ③ What is the possible reason why the Mediterranean can’t clean itself? A.One quarter of the shores are polluted. B.A lot of diseases are present in the water. C.It lies between Europe and Africa D.It has only one narrow entrance to the ocean 幻灯片（ 13 ）

④ The first part of the passage is mainly about ______. A.the reasons why the area of desert is growing B.the numbers of cattle farmers should keep C.the valuable soil strong winds blow away D.the damage rains and winds bring about ⑤ If people change their habits, pollution _______. A.can be completely stopped B.will become less and less C.can do less damage to people D.will do no harm to people ⑥ According to the text _______ are the worst enemy of nature. A.cattle B.humans C.deserts D.chemicals 幻灯片（ 14 ）

3.Fill in the blanks with suitable words. ① The area of desert in the world is growing. One cause of the problems is the increase of the number of cattle, which eat up grass. Without grass,land turns into desert. Another problem is that trees are cut down. There is nothing to hold the soil. Strong winds also blow away the soil on the top of the fields. ② Air pollution comes from factories, power stations and cars. Chemicals in the smoke from power stations can destroy trees and kill the fish in the rivers, lakes and seas, Time and time again there are serious radiation accidents that pollute the air. Many people were injured of killed. ③ Waste from factories and cities can also pollute water. Oceans are able to clean themselves but certain seas, once they are polluted, are not able to do so. Lakes also have the same problems. Some lakes have been serious dirtied. A lot of diseases are present in them, so they are not safe for swimming and lots of animals and plants in them have been killed. 幻灯片（ 15 ）

Step 4 Further discussion 1.Ask two students to tell their stories.(ask each of them to get ready for one before the class.) 2.Think of the question: Are we causing damage to the earth? 3.What should we do or what should we pay attention to in order to project and save our earth? 4.Collect their answers and form a propose as following A PROPOSAL ⑴ Don’t use one-off chopsticks, lunch-boxes and cups. ⑵ Don’t use paper tissue when you sneeze, sue handkerchiefs instead. ⑶ Don’t send post-cards. Send electronic cards by . ⑷ Don’t throw rubbish at will. ⑸ Don’t make a lot of noise. ⑹ Don’t waste water. 幻灯片（ 16 ）

Homework 假如你是班长， 现在要你代表全班同学给市长写一封信 反映学校前小河被污染的情况。 内容应包括以下几点： 1. 过去河水清澈见地，还有小鱼在水中游来游去。 2. 现在河水又臭又脏，水面上到处都漂着各种垃圾。 3. 河水被污染的原因是沿河几家工厂大量排放污水和沿河 居民乱丢垃圾。 4. 希望政府能采取一些措施来解决这一问题。 5. 呼吁人们保护我们的环境。 字数： 100 字左右 Dear Major, 幻灯片（ 17 ）