Unit 7 Data safety world F Project 课件+音视频2025-2026学年沪外教版八年级英语下册

该初中英语课件围绕“数据安全与信息加密”核心主题，通过“古今信息安全方法对比”导入，引导学生从密码、应用等现代方式回溯古代隐秘信息传递，借助海报要素分析、小组任务单、展示模板等学习支架，构建知识脉络。 其亮点在于以“醋写鸡蛋密信”等实验为载体，融合项目式学习，学生通过小组合作分析加密方法弱点并提出改进（思维品质），树立网络安全意识（文化意识），提升听说读写及合作探究能力（学习能力）。教师可依托结构化流程与多元评估，高效落实教学目标，学生在实践中深化语言运用与核心素养。

Unit 7 Data Safety Project Sharing Your Secrets 粤教沪外教版（2024）八年级 下 Learning objectives 0 Lead in Pre-reading 2 While-reading Post-reading 4 Summary 6 Assessment 1 3 5 7 Exercises 8 Homework 9 In this lesson, we’ll be able to: 一、语言能力: 掌握核心词汇 / 短语：vinegar, alum powder, hard-boiled egg, secret information, presentation, weakness, improve。 二、文化意识: 树立网络安全意识，养成负责任的网络行为习惯。 辩证看待数字世界，学会保护个人隐私，尊重他人信息安全。 三、思维品质： 通过分析示例海报，梳理信息要素，提升逻辑归纳和批判性思维（分析方法弱点并提出改进方案）。 四、学习能力： 能运用项目文本的结构，口头介绍一种信息加密 / 分享方法； 能通过小组合作完成信息搜集、海报制作与课堂展示，提升听说读写综合能力与合作探究能力。 Learning Objectives 3 01 Lead in 01 How do we keep messages safe today? Today we use passwords, emojis, and even special apps to keep things private. 01 Lead in 01 What did people do before there were passwords or apps? They had no phones, no Wi-Fi, but they still needed to share secrets safely. Pre-reading 02 What parts does this presentation include? Let’s find them out together! Designer（发明者） Method（核心原理） What to use（材料） How to use（步骤） Weakness（缺点） Step 1 Study the presentation to find out what information it includes and what makes this presentation clear and attractive. Pre-reading 02 eg. We use vinegar to make invisible ink. vinegar /ˈvɪnɪɡə(r)/ n. 醋 Pre-reading 02 eg. Mix alum powder with vinegar. alum powder /ˈæləm ˈpaʊdə(r)/ n. 明矾粉 Pre-reading 02 eg. Write words on a hard-boiled egg. hard-boiled egg /ˌhɑːd ˈbɔɪld eɡ/ n. 煮熟的鸡蛋 Pre-reading 02 Key Parts of a Good Poster So, what makes a good poster? Module 模块 Function 作用 Title 标题 Designer / Origin 创作者 / 起源 Materials 所需物品 Steps 操作步骤 Weakness 缺点 Catch eyes and show the theme 点明主题，吸引目光 Introduce where the method comes from 介绍方法来源 List all the things you need 列出使用材料 Show the process clearly 清晰讲解流程 Talk about the disadvantages 客观分析不足 Read quickly and answer. While-reading 03 Why does the message appear after boiling the egg? The eggshell has calcium. Vinegar works with it. When we boil the egg again, the secret words can be seen. While-reading 03 Step 2 Work in pairs and research different methods of sharing secret information.Pick one method to present. While-reading 03 Choose Your Method Egg Secret Message Caesar Cipher Simple Code You can choose one method to research and present. Step 3 Discuss what to include in your presentation. Use these questions to help you: While-reading 03 What is the method? Who invented this method? (Or when/where was it used?) What are needed to use this method? It is a way to… / It is called… It was invented by… / It was first used by… You need… / The materials are… Step 3 Discuss what to include in your presentation. Use these questions to help you: While-reading 03 How can you use this method? (Write 3-4 simple steps) Is there any weakness of using this method? How can you improve this method? First, … Then, … Next, … Finally, … A weakness is… / The problem is… We can improve it by… / To make it better, we can… Group Task: Fill in Your Plan Sheet While-reading 03 Group Name: ____________ Topic: _________________ 1. What is the method?________________________ 2. Who invented this method?________________________ 3. What are needed?________________________ 4. Steps to use it: ①__________ ②__________ ③__________ 5. Weakness:________________________ 6. Improvement:________________________ Check List ✅ All questions have answers? ✅ Key words are clear? ✅ Steps are in order? Step 4 Work in pairs. Exchange your ideas and decide what information you’ll include in your presentation. While-reading 03 Exchange ideas with your partner Check if all information is clear and complete Decide what to keep for your poster Get ready to make your poster! Step 4 Work in pairs. Exchange your ideas and decide what information you’ll include in your presentation. While-reading 03 Partner A Partner B Share your answers to the 6 questions. Listen carefully and take notes. Explain your ideas clearly. Ask questions and add new ideas. Together: Decide what to keep and what to leave out. Example ❌ Leave out small details How many minutes to boil the egg How much vinegar to use Long, hard sentences ✅ Keep these key points The name of the method Materials you need Simple steps (3-4 only) Weakness and improvement Step5 Create your poster and prepare to talk about it. Post-reading 04 TIPS: Use short words and key phrases（别写长句） Add simple drawings（简笔画加分，不用复杂图案） Use different colors to highlight parts（标题、关键词用彩色笔突出） Don’t write too much（字太多会看不清） Prepare to talk about your poster Post-reading 04 Hello everyone! Our method is called _______. It was invented by _______. To use it, you need _______. First, _______. Then, _______. Finally, _______. A weakness of this method is _______. We can improve it by _______. Thank you! Post-reading 04 Step6 Present your presentation to the class. Remember to organise your presentation into clear parts. How to give a great presentation? 1. Greeting: Hello everyone! 2. Introduce: Our method is... 3. Explain: First... Then... Finally... 4. Analyze: A weakness is... We can improve it by... 5. Closing: Thank you! Show time Talk clearly (内容清晰) Pronunciation(发音标准) Body language(使用肢体语言) Fluently(流利的) Reasonable(理由合理) Grade and share: Summary 05 A good presentation needs clear parts: Title, Designer/Origin, Materials, Steps, Weakness, and Improvement. When speaking in public, we can use simple sentence structures: First… Then… Finally… (for steps) A weakness is… / We can improve it by… (for analysis) Working in pairs helps us check, add, and improve our ideas. Assessment 06 Self-assessment I can talk about my secret message method in English. I can use "First… Then…" to talk about steps. My poster has all the clear parts (title, steps, etc.). Exercises 07 1.To make the “egg secret message”, we need _______ to write on the eggshell. A. water B. vinegar C. milk D. juice 2.When talking about the steps of a method, we can use the order words: _______. A. First, Then, Finally B. One, Two, Three C. Good, Better, Best D. Up, Down, Left √ √ 单项选择。 Exercises 07 First, _______ (use) vinegar to write a message on the eggshell. We need _______ (list) all the materials on our poster. A good poster _______ (have) a clear title and simple steps. You should _________ (organise) your presentation into clear parts. When working in pairs, please _________ (exchange) your ideas with your partner. 用所给词适当形式填空。 use to list has organize exchange Basic (基础) 向家人用英语简单介绍课堂学到的鸡蛋密信小实验。 整理本节课制作的海报，妥善保存。 Improving(提升) Extend (拓展) Homework 08 和同伴一起完整复述课堂展示的英文介绍话术。 观察生活，找出 1 种其他传递隐秘信息的小方法，简单记录所需材料。 尝试动手完成 “醋写鸡蛋密信” 小实验，拍下过程照片 / 小视频。 为新找到的隐秘信息方法，构思一份简易英文介绍（口头表达即可）。 $传递情报的基本准则是赢命。好了，这件事就拜托你了，保证完成任务。准备一瓶醋酸，一个生鸡蛋，由于醋酸和蛋壳会发生化学反应，所以蘸取醋酸在蛋壳上写密码，接着部分醋酸会穿过蛋壳，再与蛋清膜发生化学反应，晾干煮熟捞出，此时熟鸡蛋上会出现焦灰的字迹。这可是一战时情报人员的重大创举呢。我不过是活学活用而已。密码传递完毕，好用的嘿嘿泡泡兵解锁科普新姿势。