Unit 9 When was it invented
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课题：Unit 9 When was it invented?
第一课时The first period (Section A 1a-Grammar Focus)
一、学习目标
(一）知识目标：使学生理解、应用有关发明史话题的短语、句型。
(二）能力目标：使学生学会简单的介绍发明史。
(三）德育目标：使学生了解发明史，更加热爱科学，热爱创造发明。
学习重点:
重点单词：invent，calculator，slipper，electric
重点词组：be invented by， be used for doing sth， see in the dark
重点句型: When was/were… invented? It was /They were invented in …（发明时间）
Who was/were … invented by? It was/They were invented by…(发明者)
What are they used for? They’re used for doing…(用途.
学习难点: Who was/were … invented by? It was/They were invented by…(发明者)
