高一英语Unit3 computers教案 人教版 必修2

英语Unit3计算机教学计划Teaching plan forI .教学大纲33601.talk about computers2.Describe things and how they work3.Give advice and make suggestions4.use the present continuous passive voice。二.teaching time : four periods。The First Period教学aims :1.learn and master the following : solve，creative，agree and worth2.train and improve the students speaking ability。Teaching Important Points:1.train the students listening and speaking abilities。2.master the new words，and make the students learn to give and express their advice。Teaching Difficult Points:how to encourage the students to finish the task of listening and speaking .Teaching Methods:1.a tape-recorder 2 .the blackboard教学表达：Step I. Greetings。Step II .Presentation。T : boys and girls，please answer one question : do you heard about 286 “386”、“486”和“586”？Ss:是。They are computers。t : which is the most advanced computer in technology？ss :“586”。T : yes，you are right。from these numbers we can see the advance oftechnology . if you want to make technology advance，you must havecreative ability and the ability to solve the problems . now I want to see how creative you are and whether you can solve the following problems . please temsStep III。Warming upnow I give you 2 minutes to consider how many uses for the followingItems。(组1: a tooth pick组23330a sock组3: a plastic bag . two minutes later，collect theAnswers)Suggested answers:1.a tooth pick can be used to get bits of food out of the space between teeth；可在Eat small things中自定义：Can be used to open a bottle .2.a sock can be used to keep your feet warm and clean；can be used to make gloves for little baby；can be used to fill some presents in on克里斯托马斯.3.a plastic bag can be used to carry things；Can be used to cover the seat of aBike when it is rainingCan be used as a glove when we pickUp sth oily or dirtyCan be used to cover our hair when weAre dyeing itCan be used as a toy .t : well done . now I give you 3 minutes to solve next problem : make as many words as you can by moving any side as many steps as you wish。(after 3 minutes，you can collect the answer)。Suggested answers : stop、side、soot、stem星形Coat、code、cram门；门。PoemRateAide，atom etc .t : now let s come to true or false 。(t，f，t)Step IV。Listening。now please listen to the tape and guess what is being descripd . while listening try to finish the form on page 57 .listen for the first time and write down the object descripd。listen again and write down its possible uses。列表for the third time to check the answer。Listening text:1.these are very simple.two sticks，about 20 centimeters long . they are usuallyMade of wood .you hold two sticks in one hand .you put one stick betweenTwo of your fingers，and you hold the other one with your thumb。these thingsCan be difficult to use at first，but you will soon learn how to pick up even小pieces of food。2.this thing is very popular and use ful。almost every one has one these days。you can see people using this thing on the bus，when they are walking，or atHome.it is usually small，about the same size as your hand，and it comes in many colours。there are several buttons on it，some for numbers，Others for other things。it can be put in your pocket or in a small bag。with it，you can talk to people far away。3.this is a large box with a big door .if you open the door，a light comes on andYou can see whats inside。you d better not leave the door open for too long，because it is not good for the things inside。you might catch a cold，if youStand in front of the open door .there are several shelves inside，some in theBox itself，some in the door。you usually find this large box in the kitchen。Answers to listening text。Objectdescripd possible used1.chopstcks eating、opening a bottle、2.cellphone making phone calls，sending pictures，sending e-mail.3.refrigerator keeping food fresh，keeping drinks cool.Step V. Speaking。let s look at the third part“speaking”。Jane wants to buy a cellphone。before she busys one，she asks her best friend what they think。群组1: you are Jane。you want to buy a cellphone。you think that a cell phone is very useful。give your reasons群组23360 you are Janes best friend。you do not think Jane should buy aCellphone。Give your reasons群组3: you are Janes mother。you do not think Jane should buy a cell phoneGive your reasonsGroup 4: you are Jane s father。you think that Jane should buy a cell phoneGive your reasons(2 minutes later，you can collect their answers)Possible answers:Jane 1 .I can use a cell phone to call my parents if I miss them or if I am late . 2 . I can use it to call for help . 3 . I can use it to stay in touch with my friends . Janewedon t really need cell phones . 2 . we are not allowed to use cell phone in school . 3 . it is better to use the money for something more importantJanes mother 1 .cell phones are too expeensive 2。Jane should not spend too much time on the phone . 3 . Jane is too young to have a cell phone。Jane s fathe R1 . if Jane has a cell phone，I can always find out where she is . 2 . a cell phone will help Jane feel safe 3 . Jane can use a cell phone sendLanguage points。1.solve vt . find an answer to a problem which is usually difficult to deal withA.he didn t know how to solve the problem .B.at last they solve the problem with the teach