译林版高中英语选修7教案： Unit3《The World online》Welcome to the unit.doc

unit 3 the world onlinewelcome to the unitteaching 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.中华资源库 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.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.)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.)来源：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)来源：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.)来源：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?中华资源库 中华资源库 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?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 who cant control themselves kill time.)3. in what ways will the internet improve our lives in the future?中华资源库 (the internet will free people from the office. ever