河南省南乐县张果屯乡中学九年级英语《Unit 9 When was it invented：Period 2》教案 人教新目标版.doc

河南省南乐县张果屯乡中学九年级英语unit 9 when was it invented：period 2教案 人教新目标版step 1 play a game (1a, 1b: p71) to learn the words about food tasteask one student to come to the front to do a blind taste test.show a bag to the students.t: look, there are 4 kinds of food in it. i will let one of you come to the front and taste them. but i will use a piece of cloth to cover his or her eyes. after tasting, he or she has to tell how each food tastes and what food it is. are you clear? sophie, please.cover sophies eyes and give her the food one by one. sophie tastes each food and tries to guess what it is.s: it is sweet. i think it is an apple.they are salty and crispy. i think they are potato crisps.it is sour. i think it is a tomato. it is salty. but i dont think i have eaten this food before. it is delicious.t: do you enjoy the food? now you can take off the cloth. the last one is pizza, which is popular with westerners. you can take it with you and go back to your seat. thank you.sophie goes back to her seat.t: hi, class. what are the four different tastes of the food sophie had? s: they are sweet, crispy, salty and sour.t: yes. they are words used to describe different tastes of food. try to use them to describe the food in the picture of 1a, section b.ask the students to read the pictures of 1a in section b and describe how the food tastes.t: now, look at the four pictures. what are they?ss: they are potato chips, lemon, ice cream and tea. t: you are right. please use the words weve just learnt to describe how they taste. s1: potato chips are crispy. lemon is sour. ice cream is sweet. tea is sweet. t: how about you? do you have a different idea?s2: potato chips are crispy and salty. lemon is sour. ice cream is sweet. tea is sweet.t: good. i think s2s answer is better. now lets repeat the description together.ss: .ask the students to write the name of a different food after each word in 1b of section b.t: now, write the names of different foods after each taste as many as possible. i think this is an easy job for you. think of the food you eat everyday at home or in restaurants. collect the answers and put them down on the blackboard.sample answers:sweet: apple, orange, banana, honey, orange juice, cakes and candiescrispy: salad, potato chips, lettuce and cucumber salty: pizza, french fries, olivessour: grapes, pickle and vinegar step 2 listening(2a, 2b: p71) ask the students to listen to a passage about potato chips and deal with some tasks.t: first, listen and judge whether the statements in 2a are true or false. do you know what you should do first?s: yes. read the instructions and sentences. t: before listening, grasp the main idea of listening material according to the key words. which are the key words in these sentences?s: by mistake, 1863, not thin enough, not salty enough, happy, in the end .t: good. the recording will be played twice. for the first time, listen carefully and pay attention to the key words. play the tape for the first time. t: for the second time, listen and finish the task of 2a. play the tape for a third time and let the students complete the sentences in 2b. then check the answers.step 3 pairwork(2c: p71) ask the students to role play the conversation about the invention of the potato chips. t: after listening to the tape, can you tell me when and how potato chips were invented? who invented them? now read the instructions of 2c. discuss with your partners and make a role play according to the sample dialogue.after the students finish discussion, ask some pairs to present their dialogues.a sample dialogue:s1: did you know that potato chips were invented by mistake?s2: wow, i didnt know that. who invented them?s1: they were invented by a chef called george crum. s2: when were they invented?s1: they were invented in 1853.s2: why do you say they were invented by mistake?s1: one day a customer in the restaurant where george worked sent back his plate of fried potatoes because he said they were cut too thick. george was in a bad mood, so he cut the potatoes really thin, and he cooked them for a long time until they were crispy. and he sprinkled lots of salt on them so they were really salty. he thought the customer would hate them. s2: and? s1: and of course the customer loved them and asked for more. s2: it is very interesting.step 4 reading (3a: p72) ask the students to read the passage about tea and then deal with the questions after it.t: as we all know, tea was first invented in china and chinese tea is the most popular all around the world. do you like drinking tea? why?s1: i like tea very much. because it makes me feel cool.s2: i like it because it can make me stay awake and i wont feel sleepy in class.s4: i like it because its good for our health.t: tea is good for our health, especially green tea. drinking green tea is helpful in a few medical conditions. green tea can help prevent teeth decaying. green tea can even help dieters. ask the students to read the passage about the tea and answer the questions.t: next, well read a passage about the tea. you will know more about it. please read the passage on p72 carefully and then find the answers to the following questions. 5 minutes for you to read. five minutes later. t: what is this article about?s1: i think it is about the invention of tea.t: was it invented on purpose or by accident?s2: by accident. the first sentence tells us that.t: when was it invented?s3: over 3,000 years before 1610.t: that was quite a long time ago. who invented it then?s4: the emperor shen nong.t: who can tell us how it was invented?s5: according to an ancient legend, once when shen nong was boiling drinking water over an open fire, some leaves from a nearby bush fell into the water and remained there for some time. he noticed that the leaves in the water produced a pleasant smell. later he tasted the water and found it quite delicious. thats how he discovered tea.step 5 writing (3b: p72) ask the students to describe the picture in the middle of p72.t: look at the picture in the middle of p72. what can you see in it?s1: i can see a dog with a flying disk in its mouth.t: you are right. it is a flying disk in the dogs mouth. look, here is a real flying disk. do you like playing it? let me show you how to play.show the students how to play a flying disk.t: by the way, do you know the history of the flying disk? how was it invented? look at the left column of 3b. you may get some information from the notes.t: what can you learn from the notes?s2: i know the flying disk was invented by college students.s3: i know the flying disk was made of metal pie plate.s4: i know the flying disk was invented in 1950s.s5: i know the story