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课件网) Unit 2 Amazing numbers Focus on culture &Cross-curriculum connection & Project 文化拓展阅读及跨学科项目化优质课 沪教版（2024）八年级 上 Learning objectives 1 Lead in Focusing culture 3 Cross-curricular connection Project 5 Summary Assessment 7 Homework 2 4 6 8 By the end of the lesson, I will be able to... 1 2 3 grasp the key sentences and expressions used to describe the development and features of different number systems; understand how numbers developed； recognize the use of numbers in creating patterns and sequences. 01 Learning objectives https://www.21cnjy.com二一教育 Lead in 02 Listen and sing with it. Lead in 02 https://www.21cnjy.com二一教育 How did the people count in the song count：/ka nt/v.计算总数 By ten. Lead in 02 https://www.21cnjy.com二一教育 How did people count things before writing appeared in ancient times Brainstorm. pebbles knots scratch shells fingers 02 Lead in abacus Each bead represents a number. One bead stands for a 5. stand for 表示 “代表；象征” A stand(s) for B（A 代表 / 象征 B）。 In math, "x" often stands for an unknown number. 在数学中，“x” 通常代表一个未知数。 represent v.代表；象征,描绘；表现 Focusing on culture Numbers are everywhere today. How did people in ancient time record numbers Let's explore the development of counting methods. How did numbers develop 03 Focusing on culture 03 Read an article from a science magazine and match the correct main idea. 1 Focusing on culture Paragraph 1 Paragraph 2 Paragraph 3 The development of Arabic numerals. The story of Roman numerals. One of the earliest counting methods: tally sticks. 03 Focusing on culture 1. How did tally sticks work 2. What is the advantage and disadvantage of using tally sticks Each stick stands for a thing we want to count. The advantage is total sticks are easy to understand, while the disadvantage is that it takes a long time to write down large numbers. Read Paragraph 1 and answer the questions 03 Focusing on culture write down 写下；记下 若接代词，需放在 write 和 down 之间（write it/them down）。 Please write down your name and phone number on the paper. 请在纸上写下你的名字和电话号码。 The teacher said something important. I need to write it down. 老师说了些重要的话，我得把它记下来。 Read Paragraph 2 and answer the questions 03 Focusing on culture 1. Where did Arabic numerals originate 2. How did they spread Arabic numerals originated in India. They spread to the Arab world and then to Europe and across the world through the Arabs. Later, people created faster ways of writing numbers. One such system developed in ancient India. Instead of using tally sticks, people began using different abstract(抽象的) symbols to represent different numbers. Researchers do not know exactly how this happened, but some believe that the sticks slowly turned into symbols over the centuries. These Indian numerals(数字）became popular, and people in the Arab world started using them too. Tha ... ...
