Unit 3 Understanding ideas (Reading) 讲义 2026-2027学年英语外研版八年级上册

Unit 3 Make it happen!　Understanding ideas (Reading) 课时基本信息 课　　题 Unit 3 Make it happen! — Understanding ideas (Reading) 课　　型 阅读课（第一课时·45分钟） 年　　级 八年级上册 版　　本 外研版（2024）英语八年级上册 教学重难点 【教学重点】 梳理、概括 A helping hand 的主要内容，完成事件排序四题与图表八空,理解 Easton LaChappelle 用 3D 打印为残障儿童造臂并免费分享设计的故事，体会发明创造的意义,掌握 artificial、condition、cost、lend、invent、brain、weigh、kilogram、download、allow 十个重点词汇与搭配 【教学难点】 深入理解文章的逻辑关系（从遇到问题到发明解决再到免费分享），能够用目标语言对本课时话题进行探讨,理解「比较使用前后」的分析方法（Learning to think） 词汇速览 artificial /ˌɑːtɪˈfɪʃl/ adj. 人造的（artificial intelligence (AI) 人工智能；artificial flowers 假花；artificial arm 人造手臂） condition /kənˈdɪʃn/ n. 状况；健康状况（medical condition 健康状况；in good/poor condition 状态良好/糟糕） cost /kɒst/ v./n. 花费；成本（cost + 金额 花费……；high/low cost 高/低成本） lend /lend/ v. 借出；帮助（lend a hand 帮忙；lend support to... 支持……） invent /ɪnˈvent/ v. 发明（invent a new technology 发明新技术；invention n. 发明；groundbreaking invention 突破性发明） brain /breɪn/ n. 大脑（use your brain 动脑筋；brain damage 脑损伤；brain signals 大脑信号） weigh /weɪ/ v. 重量为；权衡（weigh + 数量 重……；weigh heavily on... 对……造成压力） kilogram /ˈkɪləɡræm/ n. 千克，公斤（可缩写为 kg；gain/lose kilograms 增重/减重） download /ˌdaʊnˈləʊd/ v./n. 下载（download files/software 下载文件/软件；download speed 下载速度） allow /əˈlaʊ/ v. 允许（allow sb. to do sth. 允许某人做某事；be allowed in/out 准许进入/离开） （一）Free talk · 发明知多少 【过渡语】一部手机、一辆自行车都是发明——但今天故事的主角，14 岁就开始发明了。 FREE TALK：What inventions do you know? Which one do you think is the most useful in daily life? 你知道哪些发明？你认为哪个在日常生活中的用处最大？ 【提示框】 聊发明用「名称+功能+理由」三句式：I think... is the most useful because it can...——为理解「发明改变生活」先热身。 （二）读前预测 · 词云解密 Look at the word cloud and predict. What's the passage about? 观察词云预测文章内容：design 设计／improve 改进／artificial arm 人造手臂／helping hand 援手／invent 发明。 Read the passage and check your answer. 读文章核对答案：The passage tells how Easton LaChappelle created an affordable 3D-printed robotic arm for disabled children and shared the design freely online. 文章讲述 Easton LaChappelle 如何为残障儿童造出价格亲民的 3D 打印机械臂并免费分享设计。 【知识点】 ▶词云五词连成预测：invent＋artificial arm（造人造手臂）＋improve design（改进设计）＋helping hand（帮助他人）——标题 A helping hand 双关：既是「援手」又是发明本身。 【提示框】 预测时把五个词串成一句话：Someone invents and improves an artificial arm to lend people a helping hand——带着这句去验证。 读前词云预测页 （三）事件排序 · 四步故事线 Order the following events in the passage. 给文中事件排序：1 Easton and Jenny met at a science fair. Easton 和 Jenny 在科学展上相遇；2 Easton made a robot arm with blocks and fishing line. Easton 用塑料积木和钓鱼线做了一个机械臂；3 Easton made an artificial arm with a 3-D printer. Easton 用 3D 打印机造了一条人造手臂；4 Easton allowed people to use his design for free. Easton 允许人们免费使用他的设计。 【知识点】 ▶排序抓时间标志：相遇（science fair）→ 14 岁积木机械臂 → 3D 打印人造手臂 → 免费分享设计——「遇人→初造→造真→分享」四步，故事不乱。 【提示框】 排序先找「起点」和「终点」：起点是两人相遇，终点是免费分享——中间两步按年龄 14→3D 打印排定。 （四）精读图表 · 三栏八空 Complete the chart with the words and expressions from the passage. 用课文词句补全图表。【How did Easton come up with the idea? 发明缘起】Where: At a(n) 1____________（science fair）. 在科学展上。Who: Jenny, a girl born 2____________（without an arm）. Jenny，一个天生没有手臂的女孩。Problem to solve: Jenny's artificial arm cost $80,000. But children like her 3____________（grow quickly）, so they always need new arms. Jenny 的人造手臂花费 8 万美元，但像她这样的孩子长得快，总需要新手臂。 【What are Easton's inventions? 发明历程】Age 14: A robot arm. It was made from plastic blocks and 4____________（fishing line）. 14 岁的机械臂由塑料积木和钓鱼线制成。Age 16: An artificial arm. It could 5____________（move）with brain signals, but weighed 3.6 kilograms. 16 岁的人造手臂能靠大脑信号移动，但重 3.6 千克。Age 23: Another artificial arm. It 6____________（weighed）just 0.5 kilograms and 7____________（cost）around $500. 23 岁的人造手臂仅重 0.5 千克、价格约 500 美元。 【What did Easton do with his invention? 发明去向】He decided to post his 8____________（design）online for free. People could make their own with 3-D printers. 他决定免费在网上发布设计，人们可以用 3D 打印机制作自己的手臂。 【知识点】 ▶图表三栏：缘起（科学展遇到 Jenny）→ 历程（14 岁积木臂→16 岁 3.6kg 大脑信号臂→23 岁 0.5kg/500 美元臂）→ 去向（免费发布设计）——八空按栏定位。 【提示框】 数字线索最可靠：3.6 kilograms→weighed，around $500→cost——数字附近找动词，一眼锁定。 图表填空（发明缘起）页 （五）Think and share · 影响与启示 【过渡语】0.5 千克与 500 美元——两个数字背后，是 Jenny 完全不同的人生。 ①How would Jenny's life change with Easton's invention? 有了 Easton 的发明，Jenny 的生活会怎样改变？——Easton's affordable ($500) and lightweight (0.5kg) robotic arm would allow Jenny to replace her expensive $80,000 prosthetic more easily as she grows, greatly improving her quality of life. 价格亲民（500 美元）、轻便（0.5 千克）的机械臂让 Jenny 成长过程中更容易更换昂贵的 8 万美元假肢，大幅提升生活质量。 ②What can you learn from Easton? 你能从 Easton 身上学到什么？——We learn to innovate with limited resources, persist through challenges, and selflessly help others—as Easton did by creating and sharing his affordable prosthetic design. 用有限资源创新、坚持面对挑战、无私帮助他人——正如 Easton 创造并分享价格亲民的假肢设计。 Learning to think for question 1：To understand the influence of something, you can compare the situation before and after the use of it. 理解事物的影响，可以比较使用前后的情况——Before：$80,000 且孩子长大就要换；After：$500 且随长随换。 【知识点】 ▶比较法看影响：Before（8 万美元、笨重、长大即失效）vs After（500 美元、0.5 千克、随长随换）——前后一比，发明的影响不言自明。 【提示框】 答「学到什么」三层递进：会创新（用积木起步）→能坚持（改进到 23 岁）→肯分享（免费公开设计）——别只答「他很厉害」。 Think and share 页 （六）词汇精讲 · 十词联动 学习 artificial：搭配 artificial intelligence (AI) 人工智能／artificial flowers 假花——The artificial flowers look like real ones. 这些假花看上去像真的。The park has an artificial lake for boating. 公园里有一个供划船用的人工湖。 学习 condition：搭配 medical condition 健康状况／in good/poor condition 状态良好/糟糕——Jenny was born with a rare physical condition. 珍妮天生有一种罕见的身体缺陷。The car is still in perfect condition after 10 years. 这辆车 10 年后仍保持完好状态。 学习 cost：搭配 cost + 金额 花费……／high/low cost 高/低成本——The prosthetic arm costs $80,000. 这个假臂价格为 8 万美元。We must reduce the production cost. 我们必须降低生产成本。 学习 lend：搭配 lend a hand 帮忙／lend support to... 支持……——Easton wanted to lend a hand to disabled people. 伊斯顿想帮助残障人士。The community lent support to the project. 社区支持了这个项目。 学习 invent：搭配 invent a new technology 发明新技术／groundbreaking invention 突破性发明——He invented a robotic arm at age 14. 他 14 岁时发明了机械臂。The telephone was a famous invention. 电话是一项著名发明。 学习 brain：搭配 use your brain 动脑筋／brain damage 脑损伤——Math exercises train your brain. 数学练习能锻炼大脑。The accident caused mild brain damage. 事故导致了轻度脑损伤。 学习 weigh：搭配 weigh + 数量 重……／weigh heavily on... 对……造成压力——The final design weighed only 0.5kg. 最终设计仅重 0.5 公斤。The decision weighed heavily on his mind. 这个决定让他心理压力很大。 学习 kilogram：搭配 数字 + kilograms（可缩写为 kg）……千克，公斤／gain/lose kilograms 增重/减重——The package weighs 3 kilograms. 包裹重 3 公斤。She lost 5 kilograms in a month. 她一个月减了 5 公斤。 学习 download：搭配 download files/software 下载文件/软件／download speed 下载速度——You can download the arm design for free. 你可以免费下载这个手臂设计。The app downloads quickly on 5G. 这个应用在 5G 网下载很快。 学习 allow：搭配 allow sb. to do sth. 允许某人做某事／be allowed in/out 准许进入/离开——Parents allowed him to use the 3D printer. 父母允许他使用 3D 打印机。Pets are not allowed in this hotel. 本酒店不允许宠物进入。 【知识点】 ▶十词串课文：artificial arm→physical condition→cost $80,000→lend a hand→invent→brain signals→weigh 0.5 kilograms→download the design→allow sb. to do——发明故事一气呵成。 【提示框】 随堂检测八题对应 condition／lend a hand／cost／artificial arm／invention／download／weigh／allows——第 8 题主语 website 三单要加 s。 artificial 搭配讲解页 （七）随堂检测 限时独立完成随堂检测（本课词汇），完成后同桌互批，逐题核对订正。 1. condition　2. lend a hand　3. cost　4. artificial arm　5. invention　6. download　7. weigh　8. allows 一、根据句意及汉语提示补全句子 1. 医生表示他的心脏状况好转了。The doctor said his heart ______________ improved. 2. 我过去看我能不能帮上忙。I went over to see if I could __________________. 3. 显而易见，这将比我们以前了解到的花费要多得多。Clearly, this will __________ a lot more than we realized. 4. 她佩戴了一个由轻质材料制成的人造手臂。She wore an ______________ made of lightweight materials. 5. 那项发明已被那所大学申请了专利。The _____________ has been patented by the university. 6. 你可以下载文件并编辑。You can _____________ the file and edit it. 7. 你一定要权衡利益与成本二者的得失。You must _____________ the benefits against the cost. 8. 该网站允许免费获取设计。The website _____________ free access to the design. （八）作业布置 Review the key words, expressions and sentence patterns in today's lesson. 复习本课重点词汇、短语与句型。 Write a short passage about your opinion on scientific invention. 写一段话谈谈你对科学发明的看法。 【提示框】 看法短文按「影响+例子+启示」展开：影响用比较法（before/after），例子就用 Easton 的机械臂——数据（0.5kg/$500）最有说服力。 语言点归纳 课堂总结 本课为单元阅读课（第一课时）：Free talk 热身——What inventions do you know? Which one do you think is the most useful in daily life? 你知道哪些发明？你认为哪个在日常生活中的用处最大？读前预测：Look at the word cloud and predict. What's the passage about? 观察词云预测：design 设计／improve 改进／artificial arm 人造手臂／helping hand 援手／invent 发明。通读核对：The passage tells how Easton LaChappelle created an affordable 3D-printed robotic arm for disabled children and shared the design freely online. 文章讲述了 Easton LaChappelle 如何为残障儿童造出价格亲民的 3D 打印机械臂并免费在网上分享设计。事件排序四题：1 Easton and Jenny met at a science fair. Easton 和 Jenny 在科学展上相遇；2 Easton made a robot arm with blocks and fishing line. Easton 用塑料积木和钓鱼线做了一个机械臂；3 Easton made an artificial arm with a 3-D printer. Easton 用 3D 打印机造了一条人造手臂；4 Easton allowed people to use his design for free. Easton 允许人们免费使用他的设计。图表八空：【发明缘起】Where: At a(n) 1 science fair（科学展）；Who: Jenny, a girl born 2 without an arm（天生没有手臂）；Problem to solve: Jenny's artificial arm cost $80,000. But children like her 3 grow quickly, so they always need new arms. Jenny 的人造手臂花费 8 万美元，但像她这样的孩子长得快，总需要新手臂。【发明历程】Age 14: A robot arm. It was made from plastic blocks and 4 fishing line. 14 岁用塑料积木和钓鱼线做机械臂；Age 16: An artificial arm. It could 5 move with brain signals, but weighed 3.6 kilograms. 16 岁的人造手臂能靠大脑信号移动，但重 3.6 千克；Age 23: Another artificial arm. It 6 weighed just 0.5 kilograms and 7 cost around $500. 23 岁的人造手臂仅重 0.5 千克、价格约 500 美元。【发明去向】He decided to post his 8 design online for free. People could make their own with 3-D printers. 他决定免费在网上发布设计，人们可以用 3D 打印机制作自己的手臂。Think and share 两问：①How would Jenny's life change with Easton's invention? ——Easton's affordable ($500) and lightweight (0.5kg) robotic arm would allow Jenny to replace her expensive $80,000 prosthetic more easily as she grows, greatly improving her quality of life. 价格亲民（500 美元）、轻便（0.5 千克）的机械臂让 Jenny 成长过程中更容易更换昂贵的 8 万美元假肢，大幅提升生活质量；②What can you learn from Easton? ——We learn to innovate with limited resources, persist through challenges, and selflessly help others. 用有限资源创新、坚持面对挑战、无私帮助他人（Learning to think for question 1：To understand the influence of something, you can compare the situation before and after the use of it. 理解事物的影响，可以比较使用前后的情况）。词汇精讲 10 词。随堂检测 8 题。 学科网（北京）股份有限公司 $