Unit 4 Everyday Economics Starting out & Understanding ideas 课件-2022-2023学年高二下学期英语外研版（2019）选择性必修四册

Unit 4 Period 1 Starting out & Understanding ideas How did people make payments in ancient times? 课 前 导 入 课 堂 学 习 Watch the video and answer the questions. 1 What is the video about? 2 What stages are mentioned in the video? What are they like? 1 Starting out 1. What is the video about? 2. What stages are mentioned in the video? What are they like? The video is about the development of currency. There are different stages in the development of currency. Long before money was invented, people used a barter system to buy and sell things. A barter system is a way to exchange goods and services for other goods and services. Later, some goods became more widely accepted than others. These could be used to calculate the value of other products and services. Around the 11th century BC, Chinese people started to use small pieces of bronze to trade things. In the early stages, coins of different shapes were used. The coins were standardised in the Qin Dynasty and started to take a circular shape with a square hole through the middle. Around the year 1000, the Chinese began to use paper money. The Song Dynasty saw the introduction of jiaozi, which is said to be not only the first example of paper currency used in China, but also in the world. Today, we have a modern system of coins and paper notes, but this is continuing to change and develop to other forms. 1. A barter system 2. small pieces of bronze 3. paper money 4. coin＆paper currency 5. mobile payment The Development of Currency Look at the pictures and answer the questions. 2 1 What activities are shown in the pictures? 2 What do they have in common? 3 What other economic activities are part of your daily life? 1. What activities are shown in the pictures? 2. What do they have in common? The pictures show some daily activities,namely paying coins for some vegetables, using an ATM card to withdraw money, donating money to people in need, paying through an app on a smart phone. These pictures all show types of econo