人教版选修Ⅷ第三单元教案

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  Teaching goals 教学目标
  知识目标:
  1.Get students to learn useful new words and expressions in this part.
  2.Let students learn about the difference between inventions and discoveries.
  3.Have students read the passage and know about how the problem was solved.
  能力目标:
  1.Develop students' reading ability and practise skimming and scanning skills.
  2.Enable students to talk about the stages in the inventing process.
  情感目标:
  1.Let students learn about the girl's efforts to improve the solution.
  2.Develop students' sense of cooperative learning.
  Teaching important points:教学重点
  1.Let students learn about the difference between inventions and discoveries.
  2.Get students to read the passage and know about how the girl caught the snakes and released them back into the wild.
  3.Have students practise different reading skills.
  Teaching difficult points 教学难点
  1.Develop students' reading ability.
  2. Enable students to talk about the stages in inventing process.
  Teaching procedure & ways 教学过程与方式
  Step Ⅰ: Lead -in
  Before the lesson, the teacher can arouse the students' interests by a free talk about Edison and his electric bulb.
  1.Who invented the electric bulb?
  2.Can an electric bulb give light without electricity?
  3.Did Edison invent electricity?
  4.Can electricity be invented?
  5.Is electricity an invention or a discovery?
  Step Ⅱ: Warming -up
  1.Give more examples to help students know what a discovery is and what an invention is.
  A discovery is something that had existed before it was known to us.
  An invention is something that was first created or designed.
  2.Ask students to look at the pictures on P19 and discuss in pairs which pictures show inventions and which show discoveries.
  Step Ⅲ: Pre-reading
  Let students put the following stages that every inventor must go through in a suitable order. Don't correct their answer until they read the text.
  ① Applying for a patent ②Finding a problem ③Doing research ④ Testing solution ⑤Thinking of a creative solution ⑥Deciding on the invention
  Keys:②③⑤④⑥①
  Step Ⅳ: Reading
  1.Skimming
  Let students listen to the tape and then answer the following question. What's the main idea of the text( How the girl invent a way of catching snakes).
  2.Scanning.   Get students to scan the passage and ask whether the girl went through the same stages as every inventor. While reading the text fill in the chart with the help of the following questions.
  ①What was the mother upset about?
  ②What did the mother ask her daughter to do?
  ③Did she find any products to help her? Why?
  ④What did she do then.
  ⑤What were the three possible approaches? Which one did she choose.
  ⑥When did she take action?
  ⑦Do you think her method was useful.
  ⑧How did she adjust her plan? And did she succeed this time?
  ⑨How did she improve her plan to catch the snakes.
  ⑩What did she decide to do with her invention.
  B11What are the steps of getting a patent.
  表1
  ParagraphStagesDetailed information
  1Finding a problemSnakes came near my mother's house now and then and she wanted me to get rid of them without hurting them.
  2Doing researchI set about researching the habits of snakes to find the easiest way to trap them
  3Thinking of a solutionThree possible approaches:①removing the snakes' habitat②attracting the snakes into a trap using male or female perfume or food.③Cooling the snakes so that they would sleepy and could be easily caught.I decided to use the third one
  4,5,6Testing the solution Three attempts:
  ①Putting the frozen bowl over the habitat early in the morning.
  ②Putting the frozen bowl over the habitat in the evening.
  ③Putting the frozen bowl over the habitat in the evening and carrying a small net.
  The third attempt succeeded.
  7Deciding on the inventionI decided to send my invention to the patent office. A truly novel and useful invention.
  8Applying for a patent①The patent office make a search to find out that your product is really different from everyone else's.
  ②Patent examines will exam whether your claim is valid or not.
  ③Your application for a patent will be published in 18 months.
  Step Ⅴ:Post-reading
  1.Retell the stages in the girl's inventing process.
  2.Discuss the following question:
  (1)Why did cooling make the snakes less active?
  (2)Why do you think she failed the first time?
  (3)Do you think whether we can use this approach to catch mice?
  ①Snakes are cold-blooded animals. They get warmth from the sun.
  When the sun goes down at night, they cool down and become less active. So extra cooling to the snakes could make them even less active.   ②She put the frozen bowl before the sun was hot. Two hours later, the sun would become hot. The snakes could get more warmth from the sun and became active again.
  ③Mice are warm-blooded animals. Their temperature remains unchanged all the time. So we can't catch mice in this way.
  Step Ⅵ:Consolidation
  Ask students to complete the following without looking at the text book, using the words and phases from the reading passage.
  When I (1) my mother on the phone she was very upset, because some snakes came near her house (2). I thought it was a chance for me to (3) myself by inventing something (4) that would get rid of the snakes. I (5) researching the habits of snakes to find the easiest way to trap them. Finally I decided on three possible (6). My first two attempts both failed, so I had to improve my design again. To my great delight, this time I succeeded. All was in (7) and at last I collected the (8) snakes and (9) released them all back into the wild. Pressed by my friends and relations, I decided to (10) the opportunity to get recognition for my successful idea by sending my invention to the patent office.
  答案:1.called up 2. now and then 3. distinguish 4.merciful 5.set about 6.approaches 7.expectation 8.passive 9.merrily 10.seize
  Step Ⅶ: Homework
  1.Learn the useful new words and expressions in this part by heart.
  2.Read the reading passage again and try to retell the text.
  板书设计
  Unit 1 Inventors and inventions
  The problem of the snakes
  表2
  ParagraphStagesDetailed information
  1Finding a problemcame near; get rid of; without harming
  2Doing researchset about re-searching the habit
  3Thinking of a solutionThree possible approaches:①removing②attracting ③Cooling
  4,5,6Testing the solutionThree attempts: Putting a frozen bowl①in the morning.②in the evening.③in the evening ;carrying
  7Deciding on the inventionsend ; to the patent office. A truly novel and useful invention.
  8Applying for a patent①make a search ; different ②examine; claim; valid ③application;be published; 18 months.
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