下载文档原格式
课时把关练Part I Reading and Thinking基础知识练Ⅰ. 单词拼写1. Holidays are expensive and，for those on low w（工资），they are often unobtainable.2.Losing the basketball match last week was a b（激烈而不愉快的）disappointment for the team.3. I said goodbye to my friend as he got a（上，登上）the train at Beijing Railway Station.4. They enjoyed an income and lifestyle that many people would e（羡慕）.5. He saw the corner of a magazine sticking out from under the b（毛毯）.6. We must find ways to assure our children a d（相当不错的）start in life.7. The reforms are motivated by a g（真正的）concern for the disabled.8. My heart s（下沉）because I thought he was going to leave me behind.Ⅱ. 用所给短语的适当形式填空1. The little girl has several invitations to star at shows in order to concentrate on her studies.2. Nowadays many young people from the countryside finding good jobs in big cities.3. During Spring Festival，people like to firecrackers and put up spring couplets on the door.4. At dusk，I walked as far as the lake and then I made up my mind to .5. Mr. Smith was thirty minutes late for the meeting because he had been traffic jam.6. Faced with challenges，you’d better a good state of mind.7. I don’t know why you are so concerned—it isn’t your problem .8. Young people，and vitality，are like the sun at eight or nine in the morning.Ⅲ. 单句语法填空1. In my opinion，there is no evidence indicating that he is a （qualify）doctor.2. Before I entered the competition，I had mixed program of strength and （endure）training.3. I was always an （enthusiasm）reader，sometimes reading up to three books a day as a child.4. Never will I forget my first （assign）at the office of a popular English newspaper.5. If you don’t have an aim，you will drift like an （abandon）ship at sea.6. He asked me to take fewer （belong）as there was little room left in our car.7. With faith and （persevere），Goodall finally overcame all the difficulties.8. They made a （resolve）to go climbing Mount Tai on Sunday.Ⅳ. 一句多译1. 我下火车时碰巧在下雨，因此只好乘出租车。
Unit 4 How Life Began On The Earth----说课人：王华一、教学背景的分析1、教材内容分析本单元的中心话题是“天文学”，内容涉及太阳系、地球上的生命起源、宇宙大爆炸、月球探秘、黑洞效应等，主要内容围绕地球上生命的起源展开的。
本次阅读课“HowLife Began On The Earth ”通过对宇宙大爆炸理论进行科学性分析，推断出地球上生命的由来以及生物进化的过程。
2、学生背景分析“ How Life Began On The Earth 这一”话题虽然有趣，但本文的文体属于科普类说明文，内容抽象，用词多专业术语，阅读本文对高一学生来说有一定的难度。
不过本文以时间为线索，使得学生较易读懂本文的内容。
通过对本文的阅读，学生不仅可以了解地球上生命的起源以及发展过程，还可以掌握一些相关的语言知识。
二、教学目标的分析1.知识目标：（1）让学生在阅读中学到一些有用的单词和句子。
（2）让学生了解生命的起源。
2.能力目标：（1）提高学生的阅读技巧：略读，细读和对本文组织结构的分析（2）拓展学生对地球上生物进化的知识。
3.情感目标：（1）培养学生对科学的兴趣并激起学生对天文学的喜爱。
（2）调动和加强学生的环保意识。
三、重点难点的分析重点：激发学生学习兴趣，使学生完成阅读任务，理解文章内容。
难点：使学生通过播放录音及略读获取文章信息。
四、教法和学法的选择1、教学方法（1.）使用任务型教学与 PWP 教学法，让学生明确学习目标。
（2.）设计问答活动来检查学生对本文的了解。
（3.）让学生在讨论中学会合作学习。
（4.）分别利用个人、同桌和小组活动来完成学习任务。
2.学法（1.）合作学习 : 采用小组合作和组间交流等活动形式。
（2.）自主探究法 : 以学生为主体，培养学生自主探求问题的能力，主要通过相关图片、问题激活学生固有背景知识，使其自主分析、归纳、解决问题。
五、教学过程Step I Leading-in (1mins)Free talk with Ss:what is the end of the“world ”?What is the beginning of the“world ”?设计意图：以脑筋急转弯的形式引发本课的话题Step II Pre-reading (3mins)11.Each religion and culture has its own ideas about how life began on earth. What do you know?2.Are they true for the beginning of the life? Do you know what a scientific idea is?3.Read the title and look at the pictures. Can you predict what the reading will be about?设计意图：进一步激发学生的学习兴趣，激活其已有的知识，贴近了学生生活，又可以让学生对新单元的内容产生一种期待和渴望，使学生在心理上和认知上做好准备，激发他们对课文的学习兴趣并进行积极思考，从而培养其创造性的思维能力。
How Life Began on The Earth教学内容：人教版高中英语必修3第四单元阅读Ⅰ. Teaching important and difficult points:1. Enable the Ss to master the main idea of the text.2. Get the Ss to understand how to finish the exercises of the text.Ⅱ. Teaching aims:Knowledge aims:1. Let the Ss master the key words.2. Lead Ss to learn the usage of useful sentence structures.Ability aim:Develop the Ss’reading ability and let them use some reading strategies such as skimming, scanning, and so on.Emotional aims:1. Enable the Ss to understand how life began on the earth.2. Get the Ss to be aware of the importance of protecting our earth.渗透法制教育: 在上课过程中给学生渗透与《中华人民共和国环境保护法》相关的内容。
Ⅲ. Teaching methods:Task-based teachingDiscussionCooperative learningⅣ. Teaching procedureStep 1 LeadingUse a short film to lead the Ss to understand the origin of life on the earth.Step 2 Pre-readingAccording to the development of life, let the Ss divide the text into several parts, then ask them to finish the following questions.1. How many parts are there in the passage?2. What dose each part mainly talk about?Step 3 While-reading1. How many steps are there before the earth formed?2. How many steps are there during the development of life?3. Read the whole text and fill the following blanks.Nobody knows how the earth , however, there are a widely accepted , the universe began with a which threw matter in all directions. At that time, the earth was still a cloud of ,after that, the earth had become with its atmosphere, which formed with dioxide, nitrogen and so on. And thenalso appeared on the earth, which was fundamental to development of life.After many millions of years, the first extremely small began to appear, later the early and all sorts of fish also appeared in the water. And then different plants and animalson land. Later the huge animals, called , appeared.Finally some clever animals with and feet appeared, they become the most important animals on the . However, they may let the earth become too to live on.4. Finish the following exercises according to the whole text.(1) why was life able to develop on the earth but not on other planet?A. The earth had a solid shapeB. The earth did not have harmful gases in its atmosphere.C. The water stayed on the earth but not on other planets.D. The earth was not too hot.(2) why was it necessary for plants to grow before animals?A. Animals needed plants to protect them from the sun.B. Plants provided oxygen for animals to breath.C. Animals could hide from hunters in the forest.D. It was easier for plants to grow.(3) what is the correct order according to the text?①The clever animals with hands and feet appeared andspread to grow.②The “Big Bang”.③Small plants began to appear on the surface of the water.④65 million years ago of the dinosaurs ended.A. 2 1 3 4B. 4 3 1 2C. 2 4 3 1D. 2 3 4 1(4)What is the main idea of the text?A. The formation of the earth.B. The humans let the earth become too hot to live on.C. The development of dinosaurs.D. The origin of life on the earth.Step 4 Post -readingRead the text and do the true-or-false questions.(1) Human beings have known the origin of the earth clearly so far. ( )(2) the appearance of water made it possible for plants and animals to live on the earth.( )(3) Plants first appeared on land and then in the water.( )(4) Dinosaurs existed on the earth for over 140 thousand years. ( )(5) It is human beings that are not looking after the earth very well and have caused global warming.( )Step 5 Summary1. How the earth formed .2. The development of life on the earth.3. The earth needs us to take care of it.Step 6 Homework1. Please retell the passage in your own words.2. Finish the exercises in your books.教学反思：本堂课总体达到了预期的教学效果，有不少亮点，但是其中也有许多的不足。
Unit 4 How life began on the earth教学设计【教学内容】How life began on the earth(人教新课标)·英语·高一(必修3) ·Unit 4 Astronomy:The science of the stars·Reading【教材分析】本单元的中心话题是“天文学”，内容涉及太阳系、地球上生命的起源、宇宙大爆炸、月球探秘、黑洞效应等，主要内容是围绕地球上生命的起源展开的。
How life began on the earth这篇阅读文章讲述了地球上生命的起源，所使用的文体是说明文。
文章通过对宇宙大爆炸理论进行科学性分析，推断出地球上生命的由来以及生物进化的过程。
【学情分析】教学对象为高一的学生。
经过高一上学期的英语学习，他们已经储备了一定的高中英语词汇和基础知识，认知和分析水平比初中阶段有了进一步的提高，能就给出的话题展开讨论，发表自己的看法，渐渐具备了用英语获取信息、处理信息、分析问题和解决问题的能力。
学生对“天文学”这一话题并不是很陌生，由于本篇阅读文章的脉络清晰、结构分明，读起来很有趣味，引人入胜，给学生留下了很大的思考空间，能够激发学生的想象力，积极去探索文意，了解生命的起源以及生物进化的过程。
所以在设计这堂课时，我重点从学生对“天文学”这一话题的兴趣出发，设计探究点，借助电影片段创设情景。
在合作探究的基础上，感悟、体验生命起源及生物进化过程的科学性。
【教学目标】1、能力目标：通过学习，使学生能读懂文章内容，理清文章脉络，总结地球上生命的由来以及生物进化的过程。
通过速读、细读和设计问题的引导，培养学生获取、分析和处理信息的能力。
创设问题情境，在质疑、探究的学习过程中，培养学生独立思考、推理、判断和创造性思维能力。
2、情感目标：通过学习本篇文章，让学生了解地球上生命的起源以及生物进化的过程，培养学生对科学的兴趣，激发学生探索科学的热情，以及增强学生保护地球的意识。
