Unit 2 Amazing numbers 写作专项学案 2025-2026学年沪教版英语八年级上册

Unit 2 Amazing numbers 写作专项学案 写作目标 结合本单元“数字的神奇作用”主题，写一篇关于数字应用的报告或分享数字相关故事的短文，描述数字在生活中的作用、数字的发展历史及特殊数字现象，达成以下目标： 1.能正确使用本单元“数字与应用”相关核心词汇（如challenge、promise、victory、percent、budget、system、symbol、represent、sequence、population等）及短语（without hesitation、a number of、large amounts of、in addition、instead of、go up、go down、make a budget等）； 2.能熟练运用基数词与序数词描述数量与顺序，用强读与弱读提升发音准确性，用一般过去时叙述数字相关故事，用一般现在时陈述数字的常态应用，正确使用分数、百分数表达比例； 3.能按“数字的作用→相关故事/现象→感悟与应用”的逻辑完成写作，贴合“数字赋能生活，探索数字奥秘”的单元主题。 题目解析 1.体裁：报告类说明文或故事类记叙文，兼具实用性与知识性； 2.人称：第一人称（分享故事、个人感悟）或第三人称（客观介绍数字应用、历史）； 3.核心要求 ￮ 内容：覆盖“1个数字相关核心话题（人口变化、数字历史、特殊数列等）、2-3个关键细节（数据、故事片段、应用场景）、1个数字的意义或个人感悟”3个要点； ￮ 字数：80–100词，数据准确规范，描述清晰有序，语言符合八年级学生水平，体现对数字在生活中重要性的理解。 思路点拨 1.开头：明确引入核心数字话题（参考课本人口统计、棋盘麦粒故事、斐波那契数列等案例），用简洁句式点明数字的核心作用（如“记录变化” “解决问题” “揭示规律”），引出下文具体介绍； 2.中间：若写报告类，聚焦数字的实际应用（如人口变化数据、长度/高度统计），用基数词描述具体数量，用序数词说明排序，用分数/百分数呈现比例，结合图表数据补充细节；若写故事类，叙述与数字相关的经典故事（如棋盘麦粒），突出数字的神奇变化，用单元核心短语描述情节发展； 3.结尾：分享数字的意义（如“帮助决策” “揭示自然规律”）或个人感悟（如“数字蕴含智慧” “合理运用数字让生活更有序”），呼应单元“数字无处不在，赋能生活与探索”的核心主题，传递理性看待和运用数字的态度。 写作模板（逐段拆解） 模板一：人口变化报告 第一段：报告主题引入 基础句式：The population of ________ (城市/国家) has changed a lot over the past ________ (时间，如10 years). According to the data, it shows a clear trend of ________ (趋势，如growth/decline), which reflects the changes in people’s lives. 示例：The population of my city has changed greatly over the past 10 years. According to the official data, it shows a steady growth trend, which is closely related to the development of local economy. 第二段：数据与变化描述 基础句式：In ________ (年份1，如2014), the population was about ________ (数字) million. By ________ (年份2，如2024), it had risen to ________ (数字) million, increasing by ________ (百分数)%. The main reason for the growth is ________ (原因，如more job opportunities/better living conditions). 示例：In 2014, the population was about 5 million. By 2024, it had risen to 6.5 million, increasing by 30%. The main reason is that more factories and companies have settled here, bringing a lot of job opportunities. 第三段：总结与意义 基础句式：This population change tells us that ________ (感悟，如our city is becoming more attractive). Understanding such number changes can help the government make better plans for public services. Numbers are really useful for recording and analyzing social changes! 示例：This population change tells us that our city is developing rapidly and becoming more attractive. Understanding such digital changes helps the government plan more schools and hospitals. Numbers are powerful tools to understand the world around us. 模板二：数字相关故事 第一段：故事引入 基础句式：I once read a fascinating story about numbers—the story of the king and the wise old man. It shows how powerful numbers can be when we underestimate them. 示例：One of the most interesting stories I’ve ever read is about numbers and a chessboard. It teaches me a valuable lesson about the power of exponential growth. 第二段：故事核心情节 基础句式：The king challenged the old man to a chess game and promised to give him any prize. The old man asked for ________ (要求，如one grain of rice for the first square, doubling each time). At first, the king agreed without hesitation, but soon he realized ________ (结果，如he couldn’t afford the rice at all). 示例：The king loved chess and promised the winner any prize. The wise old man asked for one grain of rice on the first square, two on the second, four on the third, doubling the amount each time. The king laughed at the simple request, but as the squares increased, he found that even all the rice in his country was not enough. 第三段：故事感悟 基础句式：This story shows that ________ (感悟，如small numbers can grow into huge amounts). Numbers are not just for counting—they contain great wisdom. We should always respect the power of numbers and use them wisely. 示例：This story shows that we should never underestimate the power of numbers. What seems small at first can grow into something amazing through accumulation. Numbers are full of wisdom, and learning to understand them can help us make better decisions. 范文 The Population Change of My Hometown The population of my hometown, a small city in the north of China, has changed a lot over the past 15 years. It’s a good example of how numbers can record social development. In 2009, the population was only 1.2 million. By 2024, it had grown to 1.8 million, a 50% increase. The main reason is that many new high-tech companies have set up here, attracting young people from other places. The number of schools and hospitals has also increased by 30% to meet the needs of more people. This population change tells me that my hometown is becoming more prosperous. Numbers help us clearly see the changes around us. By analyzing such data, we can better understand the development of our city. Numbers are really important tools in our lives! 范文中文翻译 我家乡的人口变化 我的家乡是中国北方的一座小城市，在过去15年里，它的人口发生了很大变化。这是数字记录社会发展的一个很好的例子。 2009年，人口仅有120万。到2024年，人口已增长到180万，增幅达50%。主要原因是许多新的高科技公司在这里落户，吸引了来自其他地方的年轻人。学校和医院的数量也增加了30%，以满足更多人的需求。 这次人口变化告诉我，我的家乡正在变得更加繁荣。数字帮助我们清晰地看到身边的变化。通过分析这些数据，我们能更好地了解城市的发展。数字真是我们生活中重要的工具！ 素材积累 核心短语 without hesitation 毫不犹豫 a number of 几个；若干 large amounts of 大量 in addition 此外；除……之外 instead of 代替；作为……的替换 go up 上升；上涨 go down 下降；减少 make a budget 做预算 write down 写下；记下 population growth 人口增长 exponential growth 指数增长 official data 官方数据 public services 公共服务 job opportunities 就业机会 living conditions 生活条件 基础句型（含本单元重点） 基础句型 仿写句子 The population of ________ has ________ by ________% over ________. The population of Shanghai has increased by 12% over the past decade. In ________, the number was ________; by ________, it had ________ to ________. In 2010, the number was 3 million; by 2020, it had risen to 4.5 million. ________% of the population live in ________. 60% of the population live in urban areas. The story shows that ________ can ________. The story shows that small numbers can grow into huge amounts. We can use numbers to ________ and ________. We can use numbers to record changes and make reasonable plans. 好句集锦 1.Numbers are the language of the world—they help us understand changes, record history and make wise decisions. 2.Behind every number, there is a story of development or a rule of nature waiting for us to discover. 3.From population statistics to natural phenomena, numbers play an irreplaceable role in our exploration of the world. 谚语 1.Number rules the universe.（数字统治宇宙——毕达哥拉斯） 2.Facts speak louder than words, and numbers prove facts.（事实胜于雄辩，数字证明事实） 3.Little by little, one goes far.（积少成多，聚沙成塔——呼应数字积累的力量） 学生写作填空练习版 版本一：人口变化报告 The population of ________ (城市/国家) has changed greatly over the past ________ (时间). According to the data, it shows a ________ (趋势，如steady growth) trend. In ________ (年份1), the population was about ________ (数字) million. By ________ (年份2), it had ________ (变化，如risen/fallen) to ________ (数字) million, changing by ________ (百分数)%. The main reason for this change is ________ (原因，如better medical care/more people moving out). This population change tells us that ________ (感悟). Numbers help us see the changes clearly. We should learn to use numbers to understand the world around us! 版本二：数字相关故事 I once read an interesting story about numbers. It was about ________ (人物，如a king and a wise man) and a ________ (相关事物，如chessboard/grain of rice). The king ________ (行为，如challenged the wise man to a game) and promised him any prize. The wise man asked for ________ (数字相关要求). At first, the king thought it was too simple, but soon he realized ________ (结果). This story teaches me that ________ (感悟). Numbers are not just for counting—they have great power. We should ________ (行动，如learn to analyze numbers/respect the rules of numbers) in our daily lives. 学科网（北京）股份有限公司 $