1、第四课时 Section B(1a1e)知识目标类别 课时要点重点单词 1.crispy（ adj.）脆的；酥脆的2.salty(adj.)咸的3.sour（adj.）酸的；有酸味的4.customer（n.）顾客；客户重点句式 1.Did you know potato chips were invented by mistake?你知道土豆片是被错误地发明的吗？I didnt know that.Who invented them?我不知道，是谁发明的?2.The customer thought the potatoes were not thin enough.顾客认为土豆不够薄。3.
2、Finally he put lots of salt on them so they were salty enough.最后他在它们上面撒了许多盐以使他们足够咸。课堂环节自主学习方案【新词自查】根据句意及首字母提示完成句子。1.I dont like lemons because they are too sour.2.Lucy and Lily are twins.People often mistake them for each other.3.For a restaurant,customers are the most important.4.The fish was too s
3、alty because my mom put too much salt on it.5.We often put the food into the fridge to keep it fresh in summer.课堂导学方案Step 1 情景导入参考案例回顾：在前面的课程我们已经学习并了解了几种有用的发明，它们在很大程度上改变了我们的生活，使我们的生活更丰富多彩。教师可提几个简单的问题来回顾上节课的内容，然后邀请几位同学就提出的问题给出自己的答案或见解。 （4 分钟）Questions:1.When was the telephone invented?_2.Can you imag
4、ine the life without telephones?_3.What do you think is the most helpful invention?_4.What would you most like to invent if you could?_环节说明:课前的师生问答互动不仅让学生回顾了上节课的内容，巩固了被动语态，同时，让他们知道创新和发明可以改善人类的生活，要勇于开拓、创新。Step 2 完成教材 1a-1e 的任务【操作案例】1.要求学生翻开课本 P45，迅速阅读 1a 部分的内容。并按要求完成课本上相应的任务，然后要求 4 名同学给出自己的答案，并进行个读、齐
5、读。(2 分钟)2.要求学生完成 1b 部分的任务，然后邀请几名同学给出自己的答案，并把收集的答案列举在黑板上。(4 分钟)3.听第一遍录音，完成课本上 1c 部分的任务。 （2 分钟）4.听第二遍录音，完成课本上 1d 部分的任务。 （2 分钟）5.听力内容巩固训练。要求学生根据所听到的内容完成下列短文。完成后要求若干学生给出自己的答案。以巩固对听力内容的了解。(3 分钟)Do you like potato chips? Do you know how the potato chips were invented? Now,lets listen and fill in the blank
6、s.Potato chips were invented by mistake.They were invented by a chef called George Crum.One day a customer thought the fried potatoes werent thin enough and werent salty enough.So George cut them really thin and cooked them for a long time until they were crispy.And he sprinkled a lot of salt on them so they were salty.6.听第三遍录音，并打开听力材料，全班逐句进行跟读。(2分钟)7.放下听力材料，要求学生利用 1c 和 1d 的听力内容，模仿1e 方框所给的对话编造一个有关土豆条的发明的对话练习。然后邀请 2-3 对同学当堂分角色演示。看哪一对的表现最佳。 (5分钟)环节说明:将听、说、读、写的任务结合起来不仅锻炼了学生的语言综合运用能力，还巩固了学生对目标语言的学习、识记和运用;薯条的发明的小故事有很强的趣味性，让学生体会到了英语学习的乐趣。当堂评价方案(详见当堂训练部分 )
