Unit 13 We're trying to save the earth! Section A 3a, 3b 英文教案 2025-2026学年人教版（2012）九年级英语全册

Unit 13 We're trying to save the earth!-Section A-3a, 3b 【教学目标】 Language Competence: Master academic vocabulary (reusable, transportation, plastic) and complex sentence structures (passive voice for environmental issues), improve reading comprehension of persuasive texts. Cultural Awareness: Recognize global efforts in reducing plastic use (e.g., bag bans) and cultural values behind sustainable lifestyles. Thinking Ability: Analyze the author’s argumentative techniques (facts, examples, appeals), evaluate the feasibility of environmental solutions. Learning Ability: Extract key points from expository texts, apply skimming & scanning strategies to environmental readings. 【教学重难点】 Key Points: Understand the logical structure of an argument on environmental protection; use context clues to infer meanings of ecological terms. Difficult Points: Distinguish between problem-solving proposals and their practical challenges; accurately paraphrase complex ideas about plastic pollution reduction. 【教学过程】 一、复习导入 T（Teacher）: Good morning, class! Yesterday, we delved into the environmental problems in 2a - 2d. Can someone recall one air pollution problem we discussed? S（Student）: Factories that burn coal pollute the air with black smoke, and there are too many cars on the road, which also causes air pollution. T: Excellent! And what about water pollution? S: People throw a lot of rubbish and waste into the rivers, making the water dirty. T: Exactly. The earth is in a tough situation due to these pollutions. Now, let's think about some solutions we talked about. How can we cut down air pollution? S: We can take the bus, subway, or ride a bike instead of driving. T: Great. And for dealing with waste pollution? S: Bring reusable bags when shopping, avoid using wooden chopsticks and plastic forks for takeaway food, and throw rubbish into the bins properly. T: Well done. Today, we will continue exploring more about saving the earth in 3a and 3b. 二、3a 课文讲解 T: First, look at 3a. Here we have a passage about a river. Before we read, let's look at the pictures and the title “The River Pollution in Town”. Try to predict what the passage might be about. Discuss in pairs for a minute. (Students discuss in pairs) S1: Maybe it will talk about how polluted the river is and what causes the pollution. T: That's a good prediction. Now, let's read the passage silently by yourselves. While reading, underline the main problems of the river and the reasons for the pollution. (Students read the passage silently) T: Time's up. What are the main problems of the river as described in the passage? S: The river used to be clean, but now it's really dirty. There is a lot of rubbish in it, and the water smells terrible. T: Right. And what are the reasons for this pollution? S: Factories are putting waste into the river. Also, people are throwing litter into it, like plastic bottles, food wrappers, and old clothes. T: Exactly. Let's read the passage again, sentence by sentence, and analyze some important language points. The first sentence: “The river in our city used to be clean.” Here, “used to” is an important phrase. It means that something happened regularly in the past but no longer happens. For example, “I used to play football every weekend, but now I'm too busy.” Can you make a sentence using “used to”? S: I used to live in a small village, but now I live in the city. T: Perfect! Now, look at “be full of”. The passage says “The river is full of rubbish.” It means the river contains a large amount of rubbish. We can also say “The room is full of books.” What else can we say is full of something? S: The basket is full of fruits. T: Great. Another point, “cause a lot of problems”. The pollution in the river causes a lot of problems. “Cause” here means to make something happen. For example, “Smoking can cause health problems.” What problems can air pollution cause? S: Air pollution can cause breathing problems and diseases like lung cancer. T: Very good. Now, let's look at the last part where it says “Everyone in the town should play a part in cleaning it up.” “Play a part in” means to take part in or contribute to something. For example, “We should all play a part in protecting the environment.” What can we do to play a part in cleaning up our classroom? S: We can sweep the floor, clean the desks, and throw the rubbish away. T: Right. Now, let's read the whole passage together to get a better understanding. (Students read the passage together) 三、3b 练习引导 T: Now, let's move on to 3b. In this part, you need to write a letter to the local newspaper about an environmental problem in your area. First, let's brainstorm. What environmental problems do we have in our local area? Think about air, water, land, or any other aspects. Discuss in groups of four. (Students discuss in groups) T: Okay, let's share some of your ideas. S1: There is a lot of litter on the streets. People don't throw rubbish into the bins properly. T: Good. What else? S2: The air near the industrial area is often polluted. The factories there give out bad - smelling gases. T: Right. Now, let's think about how to structure our letter. First, we should introduce the problem clearly. For example, if we are writing about the litter problem, we can start like this: “Dear Sir/Madam, I am writing to draw your attention to the serious litter problem in our area. The streets are often full of all kinds of rubbish, which not only makes our town look ugly but also causes health problems.” Then, we need to explain the reasons for the problem. What could be the reasons for the litter problem? S: People are not aware of environmental protection, and there are not enough rubbish bins in some places. T: Exactly. We can write: “The main reasons for this problem are that many people lack environmental awareness and do not realize the importance of keeping our environment clean. Besides, the number of rubbish bins in some areas is insufficient, making it inconvenient for people to dispose of their waste properly.” Finally, we should suggest some solutions. What solutions can we suggest for the litter problem? S: We can organize environmental protection campaigns to raise people's awareness, and the government can add more rubbish bins in public places. T: Great. We can write: “To solve this problem, I suggest that the local government organize more environmental protection campaigns to educate people about the importance of environmental protection. Also, more rubbish bins should be placed in public areas to encourage people to throw their rubbish in the right place.” Now, start writing your letters. You can choose any environmental problem you discussed. Remember to follow the structure we just talked about. (Students start writing their letters) T: While you are writing, I will walk around and help if you have any questions. (Teacher walks around the classroom, helping students) 四、学生作品分享与点评 T: Time's up. Let's stop here. Who would like to share their letter with the class? (Several students raise their hands) T: Okay, S1, please come to the front and read your letter. (S1 comes to the front and reads the letter) T: Thank you, S1. That was a very good letter. You clearly introduced the air pollution problem near the industrial area, explained the reasons like factory emissions and lack of proper pollution control measures, and your solutions, such as asking the factories to install better pollution - control equipment and the government to strengthen supervision, are practical. Now, let's see if anyone has any comments or suggestions for S1's letter. S2: I think you could add some more details about how the air pollution affects people's lives, like more people getting sick. T: That's a great suggestion. Adding such details can make the letter more persuasive. Now, S3, would you like to share your letter? (S3 comes to the front and reads the letter) T: Wonderful, S3. Your letter about the water pollution in the local lake is well - written. You described the problem vividly, gave clear reasons, and your solution of setting up a volunteer group to clean the lake regularly is creative. Any comments from the class? S4: Maybe you can mention something about how to prevent people from throwing rubbish into the lake in the future. T: Good point. Prevention is also very important when dealing with environmental problems. 五、总结与作业布置 T: Today, in 3a, we learned about a river pollution problem, and in 3b, we practiced writing letters about environmental problems in our local area. Remember, environmental protection starts from ourselves and from small things around us. For homework, I want you to improve your letters based on the comments and suggestions we just had. Also, share your letters with your parents and discuss with them how you can all contribute to solving the environmental problems in your area. That's all for today's class. See you next time! 学科网（北京）股份有限公司 学科网（北京）股份有限公司 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $$