Unit 1 课时8 Project&Review&Self-assessment（课件）英语仁爱科普版2024八年级上册

You work at the college library. You're in the middle of a quiet afternoon when suddenly a shipment of one thousand, two hundred and eighty different books arrives. The books have been dropped off in one long straight line, but they're all out of water in. The automatic sorting system is broken. To make matters worse, classes start tomorrow, which means that first thing in the morning, students will show up in droves. Es, looking for these books. How can you get them all sorted in time? One way would be to start at one end of the line with the first pair of books. If the first two books are in order, then leave them as they are otherwise, swap them, then look at the second and third books, repeat the process and continue until you reach the end of the line. At some point, you'll come across the book that should be last and keep swapping IT with every subsequent book moving IT down the line until IT reaches the end where IT belongs. Then start from the beginning and repeat the process to get the second to last book in its proper place and keep going until all books are sorted. This approach is called bubbled sort. It's simple but slow. You'd make one thousand two hundred and seventy nine comparisons in the first round, then one thousand two hundred and seventy eight and so on, adding up to eight hundred, eighteen thousand five hundred and sixty comparisons. If each took just one second, this process would take over nine days. A second strategy would be to start by sorting just the first two books, then take the third book and compare IT with the book in the second sort. If IT belongs before the second book, swap them then compared with the book in the first spot, and swap again if needed. Now you've started the first three books, keep adding one book at a time to this sorted supply, comparing and swapping the new book with the one before IT until it's correctly placed among the books sort IT. So far, this is called insertion sort. Unlike bubble, sort IT usually doesn't require comparing every pair of books. On average, we'd expect to only need to compare each book to half of the books that came before IT. In that case, the total number of comparisons would be four hundred and nine thousand, two hundred and eighty taking almost five days. You're still doing way too many comparisons. Here's a Better idea. First, pick a random book, call IT the partition and compare IT to every other book. Then divide the line by placing all the books that come before the partition on its left and all the ones that come after IT on its right. You've just save loads of time by not having to compare any of the books on the left to any of the ones on the right ever again. Now, looking only at the books on the left, you can again pick a random partition book and separate those books that come before IT. From those that come after IT, you can keep creating sub partisans like this until you have a bunch of small sub lines, each of which you'd sort IT quickly using another strategy like insertion sort. Each round of partitioning requires about one thousand, two hundred and eighty comparisons. If your partisans are pretty baLanced, dividing the books into one hundred and twenty eight sub lines of ten would take about seven rounds or eight thousand, nine hundred and sixty seconds. Sorting these sub lines would add about twenty two seconds each. All in all, this method, known as quick sort, could sort the books in under three and a half hours. But there's a catch. Your partitions could end up lopsided, saving no time at all. Luckily, this rarely happens. That's why quick sort is one of the most efficient strategies used by programmer today. They use IT for things like sorting items in an online store by Price. We're creating a list of all the gas stations close to a given location, sorted by distance. In your case, you're done quick sorting with time. Despair, just another high sticks. Stay in the library. Unit 1 My Dream Job Lesson 8 Project & Review & Self-assessment Big Question: What do you want to be? In this unit, you will learn to: introduce your dream job. plan for future jobs. use a chart to identify the topic and main idea. use the reading strategy of visualizing. make a card of your family member’s workday. /aɪˈdentɪfaɪ/ v. 识别；辨认 阅读策略 /ˈvɪʒuəlaɪzɪŋ/ n. 视觉化 学习目标 学生能够通过听力访谈提取关键信息；能识别不同职业的特征描述，完成职业与活动匹配；能区分will和be going to的语境应用。（学习理解） 能模仿访谈框架，与同伴进行职业问答；能分析阅读文本的职业转变历程，回答细节性问题；能结合自评表，用目标语言反思本单元学习效果。（应用实践） 能设计一份“职业成长路线图”，为自评表中填写的理想职业（如教师、科学家）规划三个阶段的发展步骤（学习→实践→成就）。（迁移创新） 1 2 3 Contents Lead in 01 Project 02 Review 03 Summary 04 Self-assessment 05 Homework 06 01 Lead in Enjoy a video How does the librarian work? 孟悦（高英组） (孟) - 02 Project Making a card of your family member’s workday Activity 1 Pair work. Look at the card about the workday of Li Xue’s mom and talk about it with your partner. 按顺序；有序地 办理图书借还手续 introduce sb./sth. to sb.向某人介绍...... Activity 2 Group work. Make a card of your family member’s workday and share it with your partners. Activity 3 Share your family member’s workday in class. For example: Hello, everyone! This is my father/mother... He/She is a/an ... He/She works from ... to ... His/Her daily work is to ..., ... and .... He/She thinks the job is .... He/She loves his/her job very much. 03 Review Activity 1 Pair work. Listen to the interview and complete the table, and then ask and answer about Xiaolu’s job. help sb. with sth.在某方面帮助某人 teeth pays exams do well in...擅长... experience study Ask & Answer Why does she want to be a dentist? What does she do? How did she get this job? What is her plan? Activity 2 Pair work. Match the activities in Box A with the jobs in Box B, and then make sentences and share with your partner. 做研究 对...感兴趣 show sb. around... 带某人参观... 在意 Make sentences 1. Chuchu __________________________. She wants to be _________. 2. Feiyang _________________________. He is going to be _________. 3. Jiahui ___________________________. He wants to be __________. 4. Dora ____________________________. She will work as _________. 5.I ________________________________. My dream job is _________. loves doing research in science a scientist is interested in showing tourists around different places a guide cares about the rules and public things a police officer is a deep thinker and loves the arts an artist love doing research in science a scientist Activity 3 Pair work. Complete the conversation with will or be going to, and then practice with your partner. am going to take photos will show am going to take part in will come will join Activity 4 Read the text and answer the questions. Answer the questions 1. What was the writer’s first job? 2. How did she feel about her first job? 3. What did she often do before the bookstore opened or after it closed? 4. How does she feel about her work now? 5. Do you think she will be successful? Why or why not? She first worked as a waitress. She felt the work was boring and she had to work for long hours. She always took some books from the shelves and read them. She enjoys her work now. Yes. Because she works very hard. Hard work will pay off. 04 Summary Summary Unit 1 My Dream Job 【核心词汇】 shelf, record, dentist, reason, research, tourist, speech, term, greet, guest, smile, lead, boring, customer, conversation, simple 【核心短语】 in order 按顺序；有序地 do well in... 擅长...... help sb. with sth. 在某方面帮助某人 do research 做研究 be interested in... 对......感兴趣 care about 在意 check books in and out 办理图书借还手续 introduce new books to readers 向读者介绍新书 show sb. around ...带某人参观...... 05 Self-assessment 1. How much do you enjoy the topic? I’m interested in the topic of my dream job. I will try my best to be ___________________________ in the future. because __________________________________________________. 2. How well can you use the language and culture knowledge? I can use proper sonorization and incomplete plosions. I can use the vocabulary for/of jobs. I can use the suffixes -er/-or/-ist/-ian/ and simple future tense. I can plan for my future jobs. 3. How well can you use English to perform the activities? I can talk about different jobs. I can understand the texts and recordings in this unit. I can discuss future jobs with my partners. I can write about my dream job. 4. How well can you use thinking skills and learning strategies? I can identify the topic and main idea. I can use visualizing strategy in reading. I can work with my partner(s) in pair/group work. 5. How are you satisfied with your group project? I can make a card of my family member’s workday. I can report our project to the class. 6. How are you going to improve your English learning? ______________________________________________________________________________________________________________________________________________________________ 06 Homework Homework 巩固性作业： 1.请列出至少8种不同的职业（jobs），并写出从事这些职业的人（即加上后缀 -er, -or, -ist, -ian 等）。例如：teach — teacher, art — artist。 2.从你列出的职业中选出3个，分别写一句话描述他们的主要工作内容。 拓展性作业： 参考Project部分的Activity 2的内容，回家采访一位家人或朋友，将采访结果整理成一段话（50-70词），向班级汇报。 Thank you for listening! Lavf57.71.100 Packed by Bilibili XCoder v2.0.2 Blues 69092.805 $$