1、The Third PeriodSection B(1a1e) Teaching Important Points【教學(xué)重點】Key words & phrases：sour，customerby mistake，in the endKey sentences：1.Potato chips were invented by mistake.2.Potato chips were invented by a cook called George Crum.Key structure：Swas/werepast participlebyeg：Potato chips were invented b

2、y a cook called George Crum. Teaching Difficult Points【教學(xué)難點】 Learn more participle verbs to say the passive voice. Teaching Aids【教學(xué)工具】A tape recorder，CAI or multimedia courseware. Teaching Steps【教學(xué)過程】Step 1Leading in【新課導(dǎo)入】1GreetingGreet the class.2BrainstormingQuickly ask questions about how tea was

3、 invented.3Practice rewriting active sentences into passive voice.Step 2Cooperative inquiry【合作探究】1Finish the task in 1aShow pictures of potato chips，lemon，icecream，and salted duck eggs.Talk with the class about these foods and ask students to describe their taste.Read and learn the new words.2Finish

4、 the task in 1bDo a brainstorming：T：What other fruit is sweet/sour？What food is crispy/salty？Help them to write the words in the list in 1b.Ask different students to write their lists on the blackboard.Ask some students：Do you like lemon？How about its taste?Is the apple sweet？3Finish the task in 1cL

5、ook at the sentences in 1c.Predict what we are going to hear.Play the recording for the first time.Students listen and try to get the rough meaning.Play the recording for the second time and students circle T or F.Play the tape once again.Check their answers.4Finish the task in 1dLook at the passage

6、 in 1d.Play the recording for the fourth time.Get the students to fill in the blanks in 1d.Read aloud the passage to see how they work.5Finish the task in 1eStep 3Homework1Make conversations with other students talking about how potato chips were invented after class.2Write a conversation to talk ab

7、out something else.3Translate the following sentences into English.(1)薯片是怎么發(fā)明出來的？_(2)那種食物甜脆可口。_(3)太咸的食品不受歡迎。_ Board Design板書設(shè)計Unit 6When was it invented?Section B(1a1e)How ware potato chips invented?by mistake，by accidentsweet：crispy：salty：sour： Teaching Reflection【教學(xué)反思】When we talk about food，we sh

8、ould learn how to describe their taste.So we do a brainstorming to practice the food names and their tastes.In this period，the students should practice the passive voice in listening to the story about how potato chips were invented.And then get them to listen and speak.In this way they can improve their capacity of language organization and oral output while listening and speaking practice.Students must do some writing practice after they have