1、Unit 6 When was it invented?The Second Period Section A 2d / SectionB 1a1eTeaching aims（教学目标）一、通过学习，掌握下列词汇：sour, customer，website, list, mention, pioneer 了解以下词汇：crispy, by mistake，electricity, zipper 二、口、笔头掌握以下句型：1. The zipper was invented by Whitcomb Judson in 1893. 2. Potato chips were invented by
2、 mistake.3. The customer was happy in the end.4. They were invented in 1863.5. George wanted to make the customer happy.三、能用过去的被动语态（肯定、否定、及疑问句形式）熟练的谈论某些发明。四、学会表达由于这些创造和发明对你的生活的帮助和对生活质量提高认识 Difficulties（难点）：用过去的被动语态（肯定、否定、及疑问句形式）熟练的谈论某些发明。Teaching steps（教学步骤）1. Warm-up and revision（课堂热身和复习）Show Ss th
3、e pictures on the screen and get them to answer the question.What do these things have in common? zippers教学设计说明：创设情景，导入新课。2. Work on Section A 2d.Task 1: Role-play the conversation. Then have Ss get into pairs to discuss the question: Why does Roy think the zippers are small inventions that changed
4、the world ?Task:2 朗读 2d 中的对话，请试着翻译下列句子。1） 拉链是在 1893 年被惠特科姆.贾德森发明的。The zipper_ _ _ Whitcomb Judson _ 1893. 2) 但是在那个时候， 它没有被广泛使用。But _ _ _, it _ _ widely. Task 3: Make a conversation with the following information.For example, it mentioned that the zipper was invented by Whitcomb Judson in 1893.A: _?B
5、: In 1893.A: _?B: By Whitcomb Judson. 教学设计说明：用不同的形式巩固重点功能句。3. Work on Section B 1a. The words in the box describe how food can taste. Write them under the correct pictures. Some pictures have more than one word.4. Work on 1b. Write the name of a different food after each word.5. Work on 1c.Task 1: S
6、how the picture of potato chips and answer the questions:How do the potato chips taste?来源:学优高考网 gkstkDo you like them?Do you know how they were invented?Task 2: Listen and circle T for true or F for false.1. Potato chips were invented by mistake.2. They were invented in 1863.3. The customer thought
7、the potatoes were not thin enough.4. The customer said they were not salty enough.5. George wanted to make the customer happy.6. The customer was happy in the end.6. Work on 1d.Listen again. Complete the sentences.Do you know how potato chips were invented? Potato chips _ by a cook called George Cru
8、m. They were invented in _. George Crum cut the potatoes really, really _ and then cooked them for a long time until they were _. Finally he put lots of salt on them so they were _.7.再听录音，补全对话。来源:gkstk.ComBoy 1: Hey, did you know that potato chips were invented _?Boy 2: Really? What do you mean?Boy
9、1: Well, here on the bag it says that they were invented by _ called George Crum.Boy 2: When was that?Boy 1: Oh, it was back in 1853.Boy 2: So, why was it an accident?来源:gkstk.ComBoy 1: Well, one day, a customer came in to the restaurant where George worked. He ordered a plate of fried potatoes. Whe
10、n the potatoes came, he said they _ too thick and sent them back to the kitchen.Boy 2: So what happened?Boy 1: Well, George was angry, so he cut the potatoes really, really thin, and he cooked them for a long time until they were _. And he put lots of salt on them so they were really _. He thought t
11、he customer would hate them.Boy 2: And?Boy 1: And the customer loved them and asked for more. He told the other customers about them, and soon everyone was ordering thinly cut, crispy, salty potato chips.来源:学优高考网Boy 2: And were still eating them today. What a cool story!教学设计说明：跟读模仿语音和语调。完成学习目标一、二、三
12、。8. 观察与思考：通过听力训练思考下列几个词组的使用（1）in the end 意为“_”与_ _相当。They came up with a good idea _ _ _.他们终于想出了好办法。(2) mistake n. “错误，过失”。by mistake 意为_He put salt into his coffee_ _.他错把盐放入了咖啡中。9. Work on 1e Make a conversation about the invention of potato chips. Use the information in 1c and 1d.A: Did you know potato chips were invented by mistake?B: Wow, I didnt know that. Who invented them? 来源:学优高考网 gkstkA: 完成学习目标四 。10. 小结。检测本课学习情况。11. Homework 利用本课所学 ，向你周围的人用英语介绍薯条或其他发明物的的来历吧！教学设计说明：进一步巩固本课重点功能句。
