师：Class speaking, Stella. Good afternoon, boys and girls.
生：Good afternoon, Miss Wendy.
师：Thank you. Please take a seat. So my name is Wendy, and I am your new teacher. But your new teacher is going to give you an old lesson, a revision lesson. We are going to have a revision lesson for Unit 4. What is the name of the unit? Together.
生：Then and now.
师：Wow, perfect. Then and now, everybody. Let's try “then and now” one more time. Then, then, now, faster. Then and now. Then and now. I say “then”, you say “now”. Then.
生：Now. Then.
师：Now I say “now”. I'm going to say something “then” and you're gonna say something “now”. Okay. I say “letter”, you say “email”. Letter.
生：Email.
师：I say “book”, you say “e - book”.
生：Book, e - book. Book, e - book.
师：Faster. I say “telephone”. You say “mobile phone”. Telephone.
生：Mobile phone.
师：Video, you say “radio”. Let's say together. You say “now”, say “then”, you say “now”. Good. Although it's a little bit loud. But just consider that as a warming - up for this lesson. “Then and now”, this is what we learned in the unit, right? Okay, good. And also we learned a picture book. Do you remember what is the name of the picture book?
生：Well, I was a little girl.
师：Very good. Do you like this book?
生：Yes.
师：Okay. So I'm very glad to know you like this book. So today we're gonna do something fun. We are going to write about “then and now” with a little bit of help from this picture book. And we are going to make... What is this?
生：Exactly? This is a new picture book.
师：So today we're gonna do this. But listen, writing a new book, is it easy or very hard?
生：Difficult.
师：It's difficult. It is very difficult because we have so many things in the unit we want to write about, right? So my question, which section and what story do you want to write about in your new picture book? For me, I want to write about “Storytime”. I want to write about Grandpa read a newspaper years ago and now Grandpa is old, but he learns something new. He reads news from the internet. How cool and fashionable is Grandpa? That is my story. What about your story? You can choose any part you want. Any story you want. Okay, now I want you to open your book and try to review and think about it. Go, just choose one part and think about it.
（过了一会儿）
师：Five, four, three, two, one. Guys, we're gonna stop right here. Okay, is there anybody who wants to share your story? What story do you want to write about? Oh, boy.
生：I want to choose “Culture Time”.
师：Wow, “Culture Time”.
生：The Chinese invented the compass thousands of years ago. They invented the compass to know the direction. Now they just use their mobile phone to know the direction.
师：Oh, that is a very big change, right, from a compass to a mobile phone. Okay, very good. Anything else?
生：I want to write “Storytime” in my new book. Yeah, I want to talk about Mrs. Brown. Twenty years ago, Mrs. Brown made friends at school and she bought things from shops. And now Mrs. Brown becomes an adult and she learns something new. She makes friends on the internet and she buys things on the internet, too.
师：Now she makes friends and uses the internet. What a big change, right? Do you have some different ideas?
生：I want to write about “Culture Time”, too, because thousands of years ago, people rode horses to travel. And about 200 years ago, the British invented the locomotive. And now people travel in high - speed trains. I think now we are more and more modern.
师：Yes. This is a very modern world. So that is a very big change. Listen, you have got a lot of great ideas in your mind, little writers now. But behind all your stories, there is one word that is the same. Do you know what word?
生：Change.
师：You got it. Change. If these are changes around us, then what is this change? I couldn't, when I was a little baby, I couldn't walk. Now I can walk. I couldn't talk. Now I can talk. What is this change around me? What is that change? You can have different words here.
生：I think it's changes of us. Changes of me.
师：Yeah, that's a good one. That's a very good one.
生：I think it is changes among us.
师：Very good. What about you?
生：I think it's changes about us.
师：Any other different ideas?
生：I think that's changes on us.
师：Here I give you one word. That's my word. Changes in us. Okay. All right. So today we are going to write about both of them. First, we are going to write about changes around us, and then we're gonna write about changes in us. But first of all, let's start with changes around us. You know, if you want to write something, you need to see with your own eyes, right? Yeah, but my question is, 30 or 40 years ago, where were you?
生：We don't know.
师：You're somewhere in the universe. And that is the time when I was very little, like a baby. Okay, that's why today I have brought you some. What are those? Every one of you have got two photos. Listen, one photo is from now, okay, the year of 2022. One photo is from, Geez, 30 or 40 years ago when I was a baby. Okay, now I want you to judge the time. Like this one. They are all black - and - white, but which photo is from now and which photo is from back then? Which photo is from now?
生：I think the first photo is from now.
师：Why? Why? Good. Why?
生：Because there is an air conditioner on it. We use air conditioner now in summer when it's hot.
师：Check over there. What is that? Air conditioner. When you came in, do you feel it's very cool? That's a good benefit from the air conditioner. You're right. People now use air conditioner. And what about this one? That boy over there.
生：This photo is from then. Okay. Because the television is bigger than now. And there was a radio.
师：Yes. So people...
生：Listen to the radio.
师：You're right. Bingo. Now, you are very good at judging the time and you are very good at using the frame sentences. That's perfect. We're gonna use all these sentences when we want to judge the time. So can you read it? “This photo is from then, blah, blah. This photo is from now, blah blah blah.”
（学生读）
师：Remember, when we talk about “then” we use what tense? Good. When we talk about “now”, what tense do we use? Present tense. Are you ready to share your photos? Go, work in groups one by one.
（学生分组讨论）
（过了一会儿）
师：5,4,3,2,1. Which group is ready to share? Wow, what about this group? Everybody now leave your photo there because I have got my photos right here. Okay, so who is going to talk about the first picture?
生：I think this photo is from then because they did not have any electrical devices and they only used a big blackboard to teach. I think this photo is from now because this is a foreign teacher teaching English and she teaches the students on an electrical screen.
师：Very good. Is there any grammar problem?
生：I think we use past tense to say “then”, so you should use “used”. They used a blackboard. But all in all, very good job. Thank you. Next photo.
生：I think this photo is from then because people wore old clothes. I think this picture is from now because people wear colorful and new clothes.
师：Go on. The third one.
生：I think this picture is from now because now people drive cars and there is a traffic jam and these two people are riding balance cars. I think this picture is from then because people in the past rode bikes and walked to the places they wanted to go.
师：Yeah, you see, you say “people”, not “peoples”. Good job.
生：I think this photo is from now because people buy things from the internet and the delivery man will take the things to your home. You needn't take the things by yourself. But this picture is from then. People went to the market and bought the things they wanted. They must go there by themselves.
师：People went to the market to buy, or you can say people went to the market and bought. Very good. Now I have one question. What apps do we use now?
生：（回答相关内容）
生：I think this foto is from then because there weren't any tall buildings. I think this foto is from now because there are many tall buildings and the Jing hotel is there.
师：I like it. And it's like an ant. Do you know what is the tallest building right now in Xinjiang area? （学生回答相关内容）
生：i think this picture is from then, because look at this little girl. She was talking on the old telephone. The telephone was very big, like an elephant. This, I think this picture is from now, because the little girl is talking on the mobile phone and a mobile phone is small, but it is smart.
师：Yeah, so that's why we call it smartphone. Very good. Thank you. Just now I gave you a chance to have a look at the history with your own eyes. Very good. You saw these photos, right? Old photos. When we put all these old photos together, do you know what do we get?
生：A film.
师：Actually, this is more than a film. Do you know what it is? Old film. More than an old film. Clever. This is history. And do you know that history can talk? So what about we listen to history and let's walk to the past. With the sound of the bell. Let's take a walk in Nanjing. 30 years ago, there were markets in the streets. People went out and bought vegetables, food. People went to shops. People made money in all different ways. Now let's take a look at traffic 30 years ago. This was another busy day, a busy day for workers, a busy day for bicycles. Thirty years ago, most people rode bicycles. Nobody drove a car. There were many taxis and people made phone calls to call a taxi. Everybody went to work by buses. Things looked very different from what they are now. And now let's walk into a family who lived in the 1990s. In the 1990s, people listened to radios every day. They got news from newspapers and radios. In summer, they used fans to cool off. TVs were small and you couldn't get many TV shows then. And now things change around us. Our city changes. Do you enjoy the walk back to the history? So after this, I have a question for you. What do you think about life then and what do you think about life now? Here I have got you a lot of adjectives. Some of the adjectives are about taste, some are colors. And also you can have your own words. Do you want to talk with your partner? Yeah, go. Any idea is okay.