江苏省常州市西夏墅中学高中英语 Unit3 The world online Welcome to the unit教学设计 牛津译林版选修7.doc

unit3 the world online welcome to the unit教学设计单元：unit 3 the world online板块：welcome to the unitthoughts on the design: 本节课以说为主，通过“welcome to the unit”部分所提供的四幅图片构成的海报，介绍了因特网及其用途。学生将学会谈论把世界连接起来的因特网，因特网所带来的好处和不利之处，以及因特网将来的用处。通过对该部分相关问题的讨论，帮助学生获得更多关于英特网的信息，为更深入学习本单元内容奠定基础。 teaching aims:1. after learning this lesson, the students will be able to know more about the internet, and talk about the internet and its uses by making a debate on the effects of the internet on our lives;2. after learning this lesson, the students will develop speaking and discussing skills by talking about the four pictures and sharing ideas in a group;3. the students will have a fluent talk on that the internet connects people all over the world and that the internet has both positive and negative aspects.teaching procedures: step 1 lead-in (ppt5-9)1. talk about the computer.2. learn about “computer terms”. (1) which programme would you like to watch tonight?a program is something that we use to control or operate a computer.(2) the music from the keyboard sounds like music from a real piano.a keyboard is a set of keys on a computer that help you operate the computer.(3) i hate to clean windows.windows is a kind of computer program developed by microsoft.(4) memory is something you may start to lose with age.memory is a space in the hard drive of a computer to store information.(5) julie wants to have a pet mouse.mouse is what you control with your hand to move the cursor on the computer screen.explanation生活、学习中我们常用电脑，学生已经掌握相当的电脑知识并了解因特网的作用，有丰富的背景知识，但用英文表达能力还欠缺。通过谈论电脑和学习电脑相关术语，能让学生更好地表达，从而顺利导入本课主题。step 2 brainstorming (ppt10-12)1. do you know how people kept in touch with each other in the past?(people used letters, postcards, telegraphs, faxes and telephones to communicate before the invention of the internet. )2. then how people keep in touch with each other now? (with the development of the internet, more and more people are now using computers and the internet for communication.)3. what are your experiences using the internet?4. what is the internet?(the internet, also called the net, is a collection of computers connected in a worldwide network.)5. what are the functions of the internet? (chatting, shopping, music, etc.)explanation通过激活学生的大脑思维，学生在规定的时间内，尽可能多地将大脑中刚刚组织起来的话语与老师、同学交流。将集体回答、个体回答穿插在一起，每个问题的回答时间适中。学生在被激活的知识图式中搜索有关的素材，使它们像涓涓细流汇集起来，幸福、流畅、自由地向远方流淌。step 3 sharing information (ppt13-20) discuss the four pictures of the poster “a world of connections”. encourage students to express their understanding about the different usages of the internet and have a good imagination of what the internet brings us in the future. now work in pairs and have a discussion about each of the pictures.picture 1 1. what can people do on this website? (search for information on a variety of topics. )2. what do we call this kind of website that provides searching services?(we call it search engine.)3. how can you find information on the internet using a search engine? (enter key words.)4. what search engines do you know or often use? which is your favourite search engine?(google, baidu.)picture 2 1. what do you think would be the advantages of shopping online? (as online shopkeepers do not have to pay for the rental of a real shop, the products sold online are usually cheaper than those in real shops. it is easy and conveninent to compare a product in several online shops. paying for things is simple as you just key in the credit card number and confirm the payment online. the delivery is usually quick and the online shops proivide delivery to your home. above all, shopping online saves a lot of time.)2. what do you think would be the disadvantages of online shopping?(because people can only see pictures of the products online, sometimes you could receive something that was not what you really wanted. the safety of the payment is not 100 % guraranteed as someone may steal the account numbers or pin numbers of your credit cards registered online. besides, some people falsely advertise products and then steal customers money.)picture 3 1. have you ever tried talking with your parents or friends online?2. what devices do you need if you want to talk with people online? (a computer connected to the interent, a web-camera, a web-microphone and a web-taliking software)3. what are the good points and bad points of online talking? (there are many good points. people can save a lot of money instead of paying for long-distance calls. people can keep in touch with family members or friends wherever you are in the world. people can make new friends in different parts of the world. there are negative things too. the quality of the pictures or voices depends on the speed of network transfer. many peole talk with inline friends without realizing that their pictures could be used by others in illegal ways.)4. which way of communication do you prefer, talking face to face, talking over the phone, talking online or talking online with a web-camera? why?picture 4 1. have you tried other online services that are not mentioned here? which ones?2. what other online services do you think we will need or have in the future?3. what role do you think the internet will play in the future?4. do you think it is a good idea to live on the internet completely?explanation分享信息过程中，给学生一个想象和思考的时间和空间，集思广益，激活其头脑中各种相关的图式、概念、想法和印象等。每一幅画表达一个特定的话题，围绕这个话题，进行讨论。教师作为指导者，鼓励学生积极思考，创造性地思维，并以谈论与讨论的形式挖掘各种有用的信息和形成思路，然后在激活的想法中选择有意义的内容。对促进学生的自主学习，发展学生英语口语表达能力，起着积极的促进作用。step 4 discussion (ppt 21-23)1. what do you think the most important benefit of the internet is? (fast speed and easy access are the most important aspects of the internet.)2. do you think the internet has any negative aspects to it?(yes. there is too much information online that has not been proven to be true. there are too many exciting computer games, making those