Unit 6 When was it invented?Section A(1a－2d) 【教学目标】1.通过学习使学生掌握词汇及目标语言。词汇：invent，invention，inventor，calculator目标语言：A：When was the telephone invented?B：I think it was invented in 1876.A：Who was it invented by?B：It was invented by Bell.A：What was it used for?B：It was used for...2.帮助学生认识主动语态与被动语态的区别并能正确使用一般过去时的被动语态谈论发明历史。3.通过学习使学生懂得科学发明改变了人类生活。【教学重难点】：询问发明的时间、发明人及用途。难点：使用过去时的被动语态谈论发明历史。【课前准备】重要发明的发明者和发明时间的资料。制作多媒体课件、学案。 ┃教学过程设计┃ 一、创设情境，切入主题Step 1：Lead-inShow pictures of the four great inventions.Say“Today we are going to talk about inventions.Do you know what an invention is？These are the four great inventions in ancient China.They were invented a long time ago.”Show some pictures about modern inventions(computer，television，telephone and car). Tell students that all of these things were invented in the last 150 years，Point to each picture and let students tell what it is.Then write the names of the inventions.设计意图：通过图片帮助学生理解invention的含义，引出更多发明名称，为下一步谈论发明做好词汇准备。 二、展开过程，探究新知Step 2：Work on 1a1.Ask students to think about the following questions：Can you guess which one of them |
