Unit 6 When was it invented?Section B （1a—1d）一、【教材分析】教学目标知识目标1.会听说读写下列词汇：crispy; salty; sour; by mistake; customer；by mistake; thin enough; salty enough; make the customer happy; in the end; potato chips.2. 能正确使用语法要点中的句型：（1）Potato chips were invented by mistake. （2）The customer thought the potatoes thin enough.（3）The customer said they were not salty enough.（4）George wanted to make the customer happy.（5）The customer was happy in the end.能力目标1. To understand and describe how food can taste.2. To learn the history of potato chips by listening carefully. 3. To practice talking about the invention of potato chips.情感目标通过本课的学习，培养学生乐于探索，乐于创新和发明的精神。
教学重点理解并讨论薯条的发明教学难点熟练运用语法要点中的句型和他人对话；一般过去式被动语态的用法教学方法情景教学法；任务型教学法二、【教学流程】 环节师生活动二次备课I. 复习热身1、检查生词预习1）先通过PPT呈现本课的单词，教师领读，学生跟读，教师帮助学生正音2）做题巩固根据句意及首字母提示完成单词①The glass is very c_________. You should be careful. ②The soup is very s_________. You shouldn’t put so much salt into it.③The oranges are not sweet at all, instead, they are kind of s_________.④He put salt in her cup of tea by m_________.⑤His brother is a good cook, many c_________ go there to enjoy his cooking.答案：（1）crispy（2）salty（3）sour（4）mistake（5）customers 2、自由交谈Which food do you like? I like…Do you like eating potato chips? Yes, I do/No, I Don’t.Do you know how they were invented? …. Ⅱ. 感知体验感知1.用PPT呈现不同食物的图片,引导学生谈论它们的味道。
T: What kind of food, fruit and drink do you like best? Can you describe the tastes of them?体验1.学生分组谈论，练习对话，并学习新单词crispy; salty; sour等感知2.教师进一步通过问题启发1）Do you like eating potato chips?（2）Which kind of taste do you like?（3）Do you know how they were invented?体验2.小组讨论得出答案并做听力练习Ⅲ.强化巩固1. 处理课本内容1a部分The words in the box describe how food can taste. Write them under the correct pictures. Some pictures have more than one word.sweet crispy salty sourcrispy sour sweet salty2. 处理课本内容1b部分。
Write the name of a different food after each word. sweet banana apple orange cake…crispy potato chips …salty pizza …sour lemon grape…3. 处理课本内容1c部分Listen and circle T for true or F for false.（1）Potato chips were invented by mistake. T F（2）They were invented in 1863. T F（3）The customer thought the potatoes were not thin enough. T F（4）The customer said they were not salty enough. T F（5）George wanted to make the customer happy. T F（6）The customer was happy in the end. T F4. 处理课本内容1d部分。
Listen again. Complete the sentences.The History of Potato ChipsDo you know how potato chips were invented? Potato chips _______by a cook called George Crum. 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 _______.答案: were invented; 1853; thin; crispy; really salty5处理课本内容1e部分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 didn’t know that. Who invented them?A: ….6. 语言知识点的归纳总结。
1）salty咸的(教材第45页) salty 形容词，意思为“咸的；含盐的”，是由名词“盐，食盐”加-y构成的形容词► The boy didn’t have much for dinner because the dishes were too salty.这个男孩晚餐吃得不多，因为菜太咸了拓展】“名词+-y”构成形容词:在英语中，很多名词后加-y可以构成形容词，如： cloud—cloudy wind—windy rain—rainy sleep—sleepy sun—sunny（2）The customer was happy in the end.最后顾客高兴了 in the end 意思为“最后；最终”，相当于“at last”, finally,其后不接of短语夲短语强调虽然最初……，最后还是产生了一个……的结果► They were out of danger in the end.他们最后脱险了拓展】at the end of… 在……结束时，后接表示时间的名词；在……尽头，后接表示地点的名词by the end of… 在……以前，到……为止，常用于将来时态和过去完成时态的句子中。
3）The potato chips were invented by mistake.薯片是无意中被发明出来的by mistake意为“错误地, 无意中”，常置于句末► I’m sorry that I took your schoolbag by mistake.很抱歉我错拿了你的书包拓展】mistake为名词时，还可构成短语：make a mistake （犯错误）mistake为动词时，常用于mistake…for… （把……误认为……） ► I mistook Kate for her sister when I met her yesterdayⅣ. 实践应用1. 小组练习关于薯条发明的对话.A: Did you know potato chips were invented by mistake?B: Wow, I didn’t know that. Who invented them?A: ….2. 写一篇关于薯条发明的小文章例如：Potato chips were invented by a cook called George Crum. They were invented in 1853.George Crum cut the potatoes really, really thin and then cooked them for a long time until they were crispy. Finally he put lots of salt on them so they were really salty.Ⅴ.总结反馈1.结合板书和课件，让学生盘点所学词汇和重要句型。
单词：crispy; salty; sour; by mistake; customer.短语：by mistake; thin enough; salty enough; make the customer happy; in the end; potato chips.句型：（1）Potato chips were invented by mistake. （2）The customer thought the potatoes thin enough.（3）The customer said they were not salty enough.（4）George wanted to make the customer happy.（5）The customer was happy in the end. 2. 当堂练习1）根据句意和首字母提示补全单词①There were four famous inventions in a______ China.②These cars were p_______ by the same company.③Few pears r________ on the trees after the heavy rain.④I don’t like the t_____ of the meat.答案：① ancient ② produced ③ remained ④ taste（2）单项填空① — “Frog”, Mo Yan’s latest novel, please!— Sorry, it ____ just now. But it will come out again soon.A. sold out B. is sold out C. has sold out D. was sold out ② It ____ last week that the haze(雾霾) in Beijing caused many problems.A. reports B. reported C. is reported D. was reported 答案：① D ② DⅥ.作业布置 1. Write a short passage about the history of your favorite food. 2. Preview the new words we will use in the next lesson.三、【板书设计】Unit 6 When was it invented?Section B （1a—1d）A: Did you know potato chips were invented by mistake? B: Wow, I didn’t know that. Who invented them?A: They were invented by a cook called George Grum. B: When was that?A: Oh, it was in 1853.四、【教学反思】7。