When was it invented教案
(PPT)
1.T: Make a list of helpful inventions and annoying inventions.
(PPT)
2.Ask two students to come to Bb to finish 3a.（板书）
3.T checks the answers.
（老师奖励。） Ss finish it.
通过这个活动激发了学生的表现欲和挑战意识。
5’
（4）
Presentation
Part 3b
(PPT)
课件设计说明：教师播放课件，呈现some inventions.
图片旁注有单词。
1.T shows the PPT.
2.T: Look at these inventions. I think the most helpful invention is the computer.Because it helps people search the information.Which do you think is the most helpful invention.Why is it?
（PPT 呈现）
Which do you think is the most helpful invention.Why is it?
3.Ask two Ss to answer the questions.
营造英语氛围，鼓励学生大胆发言。
6’
(5)
Practice
1.Ask Ss to practice 3b in pairs.
2.Ask several groups to act it out.
（老师奖励。）
1. Ss look at the PPT and discuss them.
这也为下面的小组活动这一环节作了较好的铺垫。利用图片及生活中的发明，让学生进行了听，说方面的训练。培养学生一定的语感。
5’
（6）
Presentation Grammar Focus
(PPT) T:We have learned the passive voice.What is the passive voice? Do you know?
Ask some Ss to answer it.
T sums up grammar about the passive voice.
(show PPT) Ss think it about.
对所学的语法点进行归纳整理，让学生总结归律，做到灵活运用所学知识。
6’
(7)
Groupwork
Part 4
( PPT) T:Look at the picture.Imagine you are
alone on the island. What would you like to have with you?
(PPT)
Get the Ss to practice Part 4 in groups.
Ask some Ss to act it out. Ss look at PPT. 鼓励学生发挥想象力，灵活运用所学句型，各抒己见。
6’
(8)
Exercise in class
T: It’s time to do the exercise.(PPT)
Give Ss several minutes to do the exercise.
Ask 5 Ss to answer them.
T checks the answers. Ss discuss it in groups.
Ss finish it
by themselves.
设计适当的练习题，既能培养学生“写”的能力，也可以让他们再次巩固新知。 5’
(9) Assessment
教师评价。对学生在活动中的表现给予肯定和鼓励。
T: How many stars have you got?Which group is the winner?
Ss count the stars. 评价让学生明白自己在本节课的收获以及存在的问题，明确今后努力的方向。 1’
(10）Homework Write dowm your inventions.
(PPT） 拓展学生的思维，培养他们的创新意识。
【板书设计】
Unit 9 When was it invented ?
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