Section C. Material analysis本课是九年级第四单元第三话题的第三课时。主活动是1a和2。1a介绍了电脑在各行各业中的作用，也提醒了学生要合理地利用电脑和网络。在这个信息爆炸的时代，学生很容易迷失方向，辨别信息的真假尤其重要。1b既可以通过提纲式结构来巩固1a的内容，也可以让学生学习在写作中运用这种方法来草拟提纲。2这个写作任务，可以让学生充分发挥想象，如果没有了电脑，生活会变成什么样子。这从另一个角度让学生感受电脑对我们生活的重大影响。为了能让学生有足够的时间来完成这个任务，建议留作家庭作业。.Teaching aims1. Knowledge aims： 掌握本课的重点词汇和短语，继续学习定语从句。2. Skill aims:能够通过1a的pre-reading 任务来预测1a的内容。能够借助1b的提纲复述1a的内容，并把这种提纲式的结构运用到写作中。能够快速找到段落的中心句、辨别论证句。3. Emotional aims: (optional)电脑和网络是个双刃剑，在利用它来服务于生活、学习的同时，不能沉溺于游戏游戏，并且要自觉远离不良信息的诱惑。. The key points and difficult points1. Key points: Words and phrases: doubt, tiny, inside, brain, cancel, connect, no doubt, normally, for instance, besides, properly, be useful in,with the help of, for example, keep sth/sb. doing, place orders, thanks to, come into being, instead of doing sth. Sentences: There is no doubt that computers are very useful in technology and business. For example, tiny computers which are inside patients bodies can keep their hearts beating normally. In factories, robots are controlled by computers that are like human brains.Grammar: Attributive clause2. Difficult points： In space, computers have been used to control the speed and direction of a spaceship. Besides, not everything we read on the Internet is true or good for us. Computers help us at work and at home, but they must be used properly. Learning strategies 通过标志词，如：for instance, for example, besides来找到属于举例子的句子。 能够根据经验快速识别文段的中心句。 能够根据pre-reading的任务来预测文章的内容。. Teaching aid小黑板/图片/ppt等。. Teaching procedures Stage(time period)InteractionpatternsTeacher activityStudent activityRemarks1 Revision(3mins)Pair workEncourage the Ss to exchange their HMK with their partners, and check the answers by themselves.T: Hi, class! Nice to see you again. In the last period, I asked you to make up five sentences. Have you done them?T: Fine. Then exchange your sentences with your partners and check the answers by yourselves. If you finish, put up your hand.T: Now, Ill choose some pairs to show your sentences. xxx and xxx, please.T: Another pair? Exchange HMK with their partners and check the answers by themselves.Ss: Yes.S1: The Great Wall which/that was built in ancient China is regarded as the symbol of Chinese nation.S2: The girls who/that are dancing in the gym are from Class Six.S3: S4: 对于学生出现的错误，老师要马上指出来，以降低后面的学生犯同样错误的机率。2Pre-reading(7mins)Individual workClass activityStep1: Let the Ss tick the fields we use computer in.T: As we know, computers are now widely used. Now, turn to page 101. You can see many fields in 1. Please tick the fields we use computers in.T: xxx, which fields have you ticked?T: How about you, xxx? T: But do you know what the seventh word means?T: It means“leisure”. Do you know“leisure”?T: Quite right. Now, class, follow me, “entertainment”.Step 2: Encourage the Ss to give an example of the use of the computers in one of the fields mentioned in 1.T: There is no doubt that computers are very useful. So Id like you to give an example of the use of the computers in one of the fields mentioned in 1. Can you, xxx?T: Good idea! Next one?T: Yes. I like shopping on the Internet. The goods are cheap, so I often place orders in Taobao. And sometimes, if I dont want the goods, I can cancel the orders. T: Computers have become very important in many areas of work and leisure. You can find more information in 1a.Tick the fields we use computer in.S1: AllS2: Me, too.S2: Sorry, I dont know.S3:休闲、娱乐。Ss: entertainmentGive an example of the use of the computers in one of the fields mentioned in 1. S1: I think computers are useful in education. We can use them to search for helpful information. S2: In business, we can do some shopping on the Internet.S3: S4: 老师要利用点评的机会讲解新词：doubt, cancel。3While-reading(10mins)Individual workLet the Ss read 1a, underline the topic sentence of each paragraph and do 1b. Check the answers.T: Now, lets read 1a. You will learn about computers. You have two tasks while reading. One is to underline the topic sentence of each paragraph; the other is to complete the diagram in 1b. Pay attention to the expressions as “for example, for instance, besides”. They are usually used to give examples. When you finish the two tasks, please raise your hand.T: Now, lets check the topic sentences first. xxx, whats the topic sentence of paragraph 1?T: Yes, you got it. Paragraph 2, who?T: Very good job. Now, lets check the answers to the diagram. One student for one point. xxx, can you try the first point?T: Up to now, I think you have learned a lot about the use of computers, havent you?Read 1a, underline the topic sentence of each paragraph and do 1b. Check the answers and finish 1b.S1: Since computers were and leisure.