Unit 2 Amazing numbers（ Focusing on culture）课件 2025-2026学年沪教版（2024）八年级英语上册

该初中英语课件围绕数字计数方法发展史（tally sticks、罗马数字、阿拉伯数字）展开，通过Free talk（古代计数方式）和Observe and match（匹配三种数字写法）激活旧知，借助预测、略读等阅读策略及分层任务，搭建从词汇学习到语篇分析的学习支架。 其亮点在于融合文化意识（不同文明计数智慧）、思维品质（比较计数方法优缺点）与学习能力（小组合作探究），如Group work分析tally sticks局限及阿拉伯数字优势，分层作业（基础阅读、数字对照表、访谈分享）兼顾差异。学生在实践中提升阅读能力与跨文化理解，教师可依托结构化活动高效推进教学。

Amazing Amazing numbers numbers 英语沪教版八年级上册 Unit 2 Focusing on culture Learning objectives 3.运用阅读策略，如预测、略读、细读等，提高阅读理解能力和阅读效率。 2.读懂讲述数字的发展历史的语篇，获取段落大意及细节信息。 1.掌握重点词汇及短语，如symbol, count, write down, instead of等。 重点 重点 Free talk How did people in ancient times record numbers? Chinese numerals Roman numerals Arabic numerals 一、二、三、四、五 I, II, III, IV, V 1, 2, 3, 4, 5 Observe and match There are three ways of writing the numbers one to five. Match them with the correct one. This passage is mainly about ( ) A. The development of counting methods. B. The characteristics of “tally sticks”. C. The development of Arabic numerals. D. The development of Roman numerals. A Look and predict You can get some clues about the main idea from the title, subtitle and the pictures provided. Tip: Look at the title and pictures, and guess the main idea. Question 1: Where could this article come from? ( ) A. A science-fiction novel. B. A travel guidebook. C. A science magazine. D. A children’s encyclopaedia. Read and choose C Question 2: What is the TEXT TYPE of this passage? ( ) C A. Argumentation (议论文). B. Narration (记叙文). C. Exposition (说明文). Question 3: What’s the structure of this passage? Find the main idea of each part. B. Tally sticks—one of the earliest counting methods. A. The development of Arabic numerals. C. How Roman numerals work. Read and answer The development of different counting methods Para. 1 Para. 2 Para. 3 Topic sentence Details A B C How: Each “stick” stands for____________________, such as an animal or a bag of rice. When: One of the _______counting methods. Example: For each animal we want to count, we draw one stick. Characteristic: _____________ correspondence. Advantage:___________________ . Disadvantage: It can take a_________ to write down _____ numbers. One-to-one a thing we want to count earliest Easy to understand long time  large “Tally sticks” Read and fill Group work: Read the passage carefully and fill in the blanks. Where: Developed in______________. How: Using different _______________to represent different numbers. Spread to: __________→ __________ → across the world. Advantage: A faster way of writing numerals. ancient India  abstract symbols  Arab world  Europe Arabic numerals Read and fill Use: Today we still see them in many places, for example, on _____________, on __________or in __________. How: Used__________from the alphabet. Where: Used to be the most common way of writing numbers in________. Disadvantage: Roman numerals are not as common as Arabic numerals, maybe because they are _____________to use! Europe letters  clock faces buildings books too difficult  Roman numerals Read and fill Think and discuss It makes large numbers quicker to write and calculate. 1. Why did tally sticks become impractical when people needed to record large numbers? Because drawing thousands of tally marks is slow and easy to miscount. 2. What are two advantages that Arabic numerals have over Roman numerals? Group work: Think and answer the questions. Read and complete Complete the summary below with the information from the article on page 30. In ancient times, people developed a counting system called (1) ___________. Later, people replaced this system with abstract (2) ___________. These were more convenient because they were quicker to write. The numbers we use today are called(3) _________________. They were invented in (4) _________________. Thanks to the (5) _________________, this system spread to other parts of the world. Sometimes we also see numbers written with (6) _____________________ on clock faces and buildings. These are called Roman numerals. tally sticks symbols Arabic numerals ancient India Arabs letters from Roman alphabet Read and complete Complete the sentences with the words below. Change the form if necessary. exactly represent symbol system (1) The Roman symbol IV_____________ the number 4 in Arabic numerals. (2)This palace was a(n) _____________ of the king’s wealth and power. (3)The Roman alphabet is not the only writing _____________ in the world— there are many others. (4)We don’t know _____________ how many animal species there are on Earth. symbol system exactly represents Review and write 重点短语 1. 一一对应 2. 不得不做某事 3. 代替 4. 变成 5. 多亏 6. 遍及全球 7. 传播到 8. 被称为；作为...而闻名 9. 以不同方式 10. 太…而无法 one-to-one correspondence have to do sth instead of turn into thanks to across the world spread to (be) known as in a different way too + adj. + to do 定语从句 结构：先行词 thing + (that/省略) + 主语 + want to count 用 “that” 或省略 “that” 的定语从句，精确限定 “我们要数的对象”。 Each stick stands for a thing (that) we want to count, such as an animal or a bag of rice. Language point 面对这么多困难，我们决定继续奋斗，而不是放弃。 Facing so many difficulties, we decide to fight on _______ _____ giving up. 2. 在中华文化中，红色是幸运的象征。 Red is in Chinese culture. 3. 把这些有用的句子写下来，否则你会忘记的。 these useful sentences, you’ll forget them. Finish the exercise Complete the sentences with the help of Chinese. instead of a symbol of luck Write down or Summary Key expressions: one-to-one correspondence, instead of, turn into, thanks to, across the world, spread to, (be) known as, in a different way, too + adj. + to do, have to do Para. 1: Tally sticks—one of the earliest counting methods. Para. 2: The development of Arabic numerals. Para. 3: How Roman numerals work. The development of different counting methods Homework Practice: Create a table listing 1–20 in Chinese characters, Roman and Arabic numerals. 02 Expand: Ask an elder what counting tool they used when young and share it with the class. 03 Base: Read the passage on Page 30 three times. 01 numbers Bye-bye! $