师：Good afternoon, class.
生：Good afternoon, Miss Wang.
师：Sit down, please. Thank you. First, let me show you a video, okay?
生：Okay.
师：Right. You can watch carefully. In the universe, there are billions of galaxies. In our galaxy, there are billions of planets. But there is only one Earth. For most of our history, humans lived in harmony with nature. But we have shattered that balance, exploiting our planet for products and wealth, creating a climate catastrophe, driving species extinction, and putting our land, seas, and air at risk. The web of life is fragile. If it fails, we as a species will fail too. The science is clear and time is running out. We must go from harming our planet to healing it. We must protect what we have and bring back what we lost to advance to a more sustainable future, where everyone can thrive. Humanity has come together before to prevent environmental catastrophe. We have helped repair the ozone layer, restored millions of hectares of land and marine ecosystems, protecting thousands of species. We banned dangerous substances, saving countless lives. Let those victories be the torches that ignite more action and illuminate the path to a world in which we are once again at peace with nature. In the universe, there are billions of galaxies. In our galaxy, there are billions of planets. But there is only one Earth. So, long live Planet Earth! We know we only have one Earth, right? Look, the blue planet is Earth, right? E - A - R - T - H for Earth. Good. Follow me: Earth.
生：Earth, Earth, Earth, Earth, Earth.
师：Right. We know Earth is our home to you and me. But now it meets some problems. So today, we will learn Unit 7: Protect the Earth.
生：Protect the Earth.
师：Follow me: Protect.
生：Protect, Protect, Protect, Protect, Protect the Earth.
师：Right. Okay, before learning the lesson, you have previewed the story and finished the worksheet. Maybe while learning, I'll check it, okay? And we know to protect the Earth, first we should know what can be protected on Earth. Now, let's have a guessing game. I will give the first letter and some information. Try to guess what it is, okay? Letter W. It has no color. We drink it every day.
生：Water.
师：Let's see. Is he right? Yes, right. Very good. Letter A. They are living creatures and we can see them in the forest, in the zoo, and so on.
生：Animals.
师：Let's see. Good. Yeah, they are animals, right? Okay. Letter T. They are green. They can help keep the air clean.
生：They are trees.
师：They are trees exactly. Good. Letter A. We can't see it, but we can't live without it.
生：It is air.
师：Let's see. Yes or no? Yes. Good. Okay. Letter E. We use it to do many things and it comes from the wind, the sun, the water, and so on.
生：It's energy.
师：Right. A new word for you. Follow me: Energy.
生：Energy, Energy, Energy, Energy, Energy, Energy, Energy.
师：Right. Now we know what can be protected on Earth. Actually, there are many other things that need to be protected on Earth. Maybe after class we can discuss more. But in this lesson, let's talk about how we can protect the Earth. And there are four aspects mentioned in Unit 7. This time, I hope you can go through it very quickly and find out what aspects are mentioned in this story, okay? You can find the subtitles.
生：Save water.
师：Save water. Good.
生：Save energy.
师：Save energy. Good.
生：Save trees.
师：Save trees.
生：Don't use too much plastic.
师：Yes, very good. Look, they are subtitles, right? Sometimes subtitles are very useful and they can tell us the main idea about the story. Yes or no? Right. Okay. So let's read it.
生：Save water, Save water, Save water, Save water, Save energy, Save energy, Save energy, Save energy, Save trees, Save trees, Save trees, Save trees, Don't use too much plastic, Don't use too much plastic.
师：Really good. Okay, so let's say them together. First one, save water. Good. This one, save energy. Wonderful. This one, save trees. Yes. Save trees. Last one, don't use too much plastic. Plastic.
生：Plastic, Plastic, Plastic.
师：Good. Okay. First one, I want to talk about save energy. About energy, I say most of our energy comes from coal and oil. Look at this yellow part. That is coal.
生：Coal.
师：And this part, that is oil.
生：Oil, Oil, Oil.
师：Coal and oil.
生：Coal and oil, Coal and oil, Coal and oil.
师：Good. Do you know, most of our energy. Look at the red part. That is most of our energy, right? So let's say together: Most of our energy comes from coal and oil.
生：Most of our energy comes from coal and oil.
师：Do you know, are coal and oil renewable or non - renewable? I think before the lesson, you have searched some information about that, right? Are coal and oil renewable or non - renewable?
生：They are non - renewable.
师：Oh, yes. They are non - renewable. Yes or no? Um, they are our traditional energy resources. And do you know what are renewable energy resources?
生：Plants, water, wind.
师：Plants. Right. They are our renewable energy resources. Yes or no? Yeah. Hmm, we think energy is very useful and we can use energy to do a lot of things. A new pattern for you. Follow me: use to.
生：Used to, Used to, Used to.
师：Now we can use energy to warm ourselves in winter. Yes or no?
生：Yes.
师：And we can use energy to cool ourselves in summer. Right. And what else can we do? Can you say more?
生：We use energy to cook food.
师：Exactly. We use energy to cook our meal every day, right?
生：We use energy to drive cars.
师：Exactly. We use energy to drive cars, right? Okay, I think it's very useful. And we use energy to light our classroom. Yes, right?
生：Yes.
师：We use energy to light our rooms, our classrooms. Yes or no?
生：Yes.
师：Very good. So we may say energy is very useful. Good. Okay, but with the development of our society, energy crises are becoming very, very serious. I want to show you a video, okay?
（播放视频）
师：From the video, we know there is not much coal or oil on Earth. Let's say together: There is not much coal or oil on Earth. And how can we do? What should we do to save energy now? This time, I hope you can read this paragraph about save energy to find out the solutions, okay? And I hope you can discuss more in your group. You can focus on two parts: how to save electricity and how to save fuel. You can have a group work. Go.
（小组讨论后）
师：Now, boys and girls. Have you finished? First, let's talk about how can we save electricity. Do you have any ideas?
生：When we go out, we should turn off the light on time.
师：Oh, yes. Very good. When we go out, we should turn off the light. Do you understand? Right. When we leave the room, we should turn off the light. Maybe we should turn off the TV. We should turn off our computer. So when we leave, maybe we should cut off the power. Yes or no? Right. Good idea. Any others?
生：We can use new energy.
师：Oh, maybe we can use new energy resources. Right. What new energy do you know?
生：Solar energy, wind energy, water energy.
师：Very good. Now, let me introduce. That is solar energy, that is wind energy, water energy. This one, follow me: nuclear energy.
生：Nuclear energy, Nuclear energy, Nuclear energy, Nuclear energy.
师：They are new energy resources, right?
生：Yes.
师：Good. And how to save fuel?
生：We can drive EV cars.
师：Maybe we can drive EV cars. Good.
生：We shouldn't drive too much.
师：Oh, we shouldn't drive too much. So, what can we do? If you live near the school, we can go to school on foot.
生：Yes.
师：Very good. We can go to school on foot. And we can go to school by bus.