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Unit 4 Amazing Science

Topic 1 When was it invented?

Section A

Ⅰ. Material analysis

本课是九年级第四单元第一话题的第一课时。主活动是1a和2。1a 通过Kangkang 和Jane 谈论火箭模型，引入本课的语法：一般过去时的被动语态。1b 是检查学生听1a的效果，1c则是检查学生阅读理解的能力。2重点操练be made of，be made from和be used for。3a 以听的形式让学生加深对2a的句型和1a的语法的理解。3b 让学生能够把本课的句型和语法正确地说出来。总之，本课把句型和语法充分地融合到听、读、说当中。 Ⅱ. Teaching aims 1. Knowledge aims：

掌握本课的重点词汇和短语，初步学习一般过去时的被动语态。 2. Skill aims:

能够在听、说、读、写中正确运用一般过去时的被动语态。 3. Emotional aims: (optional)

鼓励学生要勤思考、有理想、争做未来的发明家。 4. Culture awareness: (optional) 了解其他国家的科技发明。

Ⅲ. The key points and difficult points 1. Key points:

Words and phrases: lock, metal, be made of, be made from, be made in, be used for, be allowed to do sth. Sentences:What’s it made of? It’s made from wood. What’s it used for?

It’s used for locking the door. I wish I could go into space some day. I hope your dream will come true. Grammar: was/were +pp 2. Difficult points：

be made of和be made from的用法辨析。 I wish I could go into space some day. It’s used for writing on . Ⅳ. Learning strategies

通过温习一般现在时的被动语态知一般过去时的被动语态，实现从一般现在时的被动语态到一般过去时的被动语态的转换。 通过联系生活实践，来区分be made of和be made from。 在交流中，重在表意，不要担心出错。 Ⅴ. Teaching aids

有关新词的图片/实物（如：数码相机,锁）/录音机/小黑板/PPT。

Ⅵ. Teaching procedures

Stage (time period) Interaction patterns Teacher activity Student activity Remarks Class activity Step 1: Let the Ss change the sentences in Change the present active voice 通过复习一般现在时的 Revision & 1 lead-in (10mins) Group work Group A into present passive voice. T: Look at these sentences and try to change them into passive voice. T: xxx, do you want to try the first one? T: Wonderful! The second one? Example: Group A People speak English around the world. The monkeys eat the bananas. Water washes away the earth. The chemical factory pollutes the river. ... Step 2: Present the sentences in Group B into passive voice. 被动语态来过渡到一般过去时的被动语态。以旧引新、比较学习能让学生更快地掌握新知识。 S1: English is spoken by people around the world. S2: The bananas are eaten by the monkey. S3:.. Change the past active voice into 一定要把学生说出的被动语态的句子板书出来，为后面的教学作准备。

and encourage the Ss to discuss in groups passive voice. and change them into passive voice, too. T: You have done very well. Now look at