2013-2014学年度第一学期高一英语必修2 教案 Unit3 ： Computers -王兴祖 Unit3: Computers Period OneThe General Idea of This Period：This period includes Warming up，Reading and Comprehending of Unit 3.It introduces the history and development of computers.From this period the students will learn more about computers.Meanwhile they can learn some reading strategies such as skimming and scanning.Teaching Aims：1.Train the students reading ability.2.Learn some useful words and expressions.3.Learn more about computers.Teaching Important Points：1.Help the students to understand the passage better.2.Learn how to use some important words and phrases in this passage.Teaching Difficult Points：1.How to help the students improve their reading ability and understand the passage better.2.Learn how to use some important words and phrases in this passage.Teaching Methods：1.Skimming the passage to get the general idea of the text.2.Scanning to get the details from the passage.3.Explanations and practice to help the students master some language points.4.Discussion to help the students understand better what theyve learned and to use the knowledge theyve learned in this period.Teaching Aids：1.A tape recorder.2.A multimedia.Teaching Procedures：Step 1 Warming up1.Greeting the students as usual.2.Introduce the topic of computersShow the five pictures （an abacus，a huge computer，a calculator，a PC，a notebook computer）and get the students name them in English.Through this task，students can have a general idea about what they are going to learn.Besides，students are expected to have a discussion about what they have in common while looking at them.And they are required to use the given expressions in their discussion to express their ideas.T：Boys and girls，today I am going to introduce some machines to you.Now lets see whether you can name them in English correctly，and talk about them.Now work together with your partners and try to find out what they have in common.Two minutes late，five students are asked to talk about them in class.S1：An abacus is an old calculating machine used in China until now.S2：A huge computer is built to solve some mathematical problems.But，in my opinion，it is too big.S3：A calculator is a new calculating machine which can solve a large number mathematical problems.And I think it is very convenient to carry and use，so we often use it.S4：A PC is a personal computer，which can solve all kinds of problems and is widely used in offices，schools，shops，at homes，etc.now.S5：A notebook computer is a kind of useful computer which can be taken conveniently like a notebook.But I think it is too expensive.T：Quite good.It seems that you are all quite familiar with these machines.But can you tell what they have in common?Any volunteers?S6：Let me try.I think they all calculate something.They can deal with some maths problems.S7：I believe that they are our good friends.With their help we can finish our work quickly.S8：The 21th century is the century of information technology.As middle school students，we should try to learn how to use computers.T：Well，your opinions are all right.Indeed，these machines all can calculate something.Whats more，from the abacus to the notebook computer，there is a long way.But now computers have already changed our lives greatly.But do you know more about computers and can you say something about how computers have changed our lives.Step 2 Pre-readingShow the questions on the screen.T：Now，please have a discussion first，and then Ill ask some students to report your work.After a few minutes.T：Now，who would like to answer the first question?Volunteer!S9：Ill have a try.I know that computers have developed from large machines.They have been made smaller and smaller，but work faster and faster.I really cant imagine what they will be like and whether they can take the place of human beings in the future.T：Yes，this is really a big problem.I think you are all interested in computers，you may go on studying computers，and perhaps one day you will design your own computers and become the masters of computers.OK!Next question!S10：I think computers have changed our lives greatly.We use computers widely in our study，in our work.You are using the computer to teach us English，arent you?S11：In my opinion，in the modern society，using the computers means grasping a tool of controlling the world.We may communicate with each other from a very long distance.In short，we can not live freely without them.T：I agree with you.The computers are becoming more and more important in our lives.But learning more about computers is also important，isnt it?OK，lets come to the reading passage “Who am I”.Step 3 ReadingTask 1.Skim the passage for the general idea.T：Boys and girls，you will be given two minutes to skim the passage and try to find out who “I” am and get the general idea of this passag