九年级英语全册《Unit 9 When was it invented》（第4课时）教案 人教新目标版

1、Unit 9 When was it invented（第4课时）教案课题：Unit 9 When was it invented? 讲课教师：学科：English课时：4总课时数：57教学目标知识与技能To learn to use passive voice (questions and statements)过程与方法To train students reading ,listening and speaking skills.情感态度与价值观Train the students to use their heads and make some inventions in life.教

2、材分析教学重点The new words and phrases to express differet kinds of food.教学难点Passive voice (questions and statements)教学过程教师活动学生活动备注（教学目的、时间分配等）Lead-inGreetings and Duty Reaport.Talk about your favorite inventions.What can we do with the computer?Yes, of course.We can relax ourselves by playing computer ga

3、mes. But playing computer games too much will waste our time,and its also bad for oue eyes. Just now, we talked about some modern inventions. Do you know the history of potato chips and tea? This class, lets learn something about them-Unit9 SectionB.Interaction and Consoladation1.New words1)crispy 2

4、)chef3)sweet-sour-bitter-hot-salty taste4)sprinkle5)by mistakeHave you ever eaten potato chips? Who can tell me the tastes of them? 1a&1b2. Listening 2a&2b2a Weve talked about the tastes of potato chips. But, who were they invented by, and when were potato chips invented, do you know? Sorry, you don

5、t. So why dont we listen to the tape and try to get the answer? 2b 1) Predicte the answers to the listening test.2) Train them to listen and write the important part of answers.3) Check the answers.4) Read the passage.useful expressions be invented by mistake, on the bag, back in 1853, one day, send

6、 back, a plate of fried potatoes, be cut too thick, in a bad mood, cutreally thin, cooka long time, sprinkle on, thinly-sliced, crispy, salty potato chips, a cool story2c PairworkDo you think the history of potato chips is so interesting? Next lets role play the conversations about it. Have a duty r

7、eport.Listen ask and answer.S1：Wecanlistentomusicanddosomereading.S2：Wecanplaycomputergames.2a Listen and circle, and then listen again and correct the mistakes.Practice using by mistake.Listen and write.Practice chef, sprinkleWork in pair.5128教师活动学生活动备注（教学目的、时间分配等）Do you know any interesting histor

8、y of inventions? Lets enjoy it together.SummaryWhat did we learn ?Exercises1. Cars were invented in 1885. (对划线部分提问)_2. Julie Thompson invented electric slippers.(改写句子)Electric slippers _3. The light was invented by Thomas Edison. (对划线部分提问)_HomeworkSum up and write the useful expressions , prepare the next.Do the exercises.551板书Unit 9 When was it invented? be invented by mistake, in a bad moodon the bag cutreally thinback in 1853 cooka l