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Unit 9 When was it invented ?
学案式教学设计
【教材版本】人民教育出版社 九年级英语
【学习内容】Grammar Focus, 3a, 3b and 4 of Unit 9 When was it invented ?
【学情分析】本节课是第九单元的第二课时, 学习任务是完成课文Grammar Focus, 3a, 3b and 4 部分的学习。本单元要求学会谈论重要发明的历史及用途，然后针对各项发明的用处及特点，发表自己的看法，并说明理由。话题一直是围绕着历史上和日常生活中的重要发明，通过使用“Passive Voice”形式的句型，循序渐进地展开讨论。课本设计的活动情景能够自然地引发学生的好奇心，大家积极地投入到话题讨论中，寓教于乐，容易引起学生的兴趣；同时，它也有利于开阔学生的思路，培养创造精神，展开丰富的想象力，人人都能成为“小发明家”。
学生在第一课时学习了本单元的Section A 中的1a至2c部分，基本能听懂、会说本单元要求掌握的部分重要词汇；在图片，相关信息等提示的帮助下，能较好地运用重要句型和掌握主动语态和被动语态及相互转换。但是本班的学生两极分化比较严重，有一部分学生基础知识不牢固，前面提到的学过的单词和句型就忘得差不多了，特别是对于课文中的语法—主动语态和被动语态，被动语态的一般现在时和一般过去时混为一谈。
所以教师在课堂教学中应面向整体，及时复习相关的知识，包括重要词汇和句型，前后知识的衔接。同时在设计上要注意活动的多样性，激发他们的兴趣，让每一位学生能得到不同程度的收获。
【单元整体目标】
重点词汇：salty, sweet, sour, crispy, pleasant, potato chips, slipper, leaf, fire, scoop, light bulb, microwave oven, abacus, camera, beverage, be invented by, be used for, by mistake, by accident
重点句型：When was the telephone invented? I think it was invented in 1876.
技能目标：能够谈论发明的历史和用途。
能够对生活中的发明发表自己的看法。
能够解决生活问题，设计新发明。
情感目标:充满想象力，发挥创造能力。
三、重点难点
重点：讨论重要发明的时间、发明者和用途，学习使用句型“When was the telephone invented?”,“Who was it/were they invented by?”,“What is it/are they used for?”和答语。
难点：如何描述一项新发明的来历和用途
【课时安排】
6课时(新课5课时，复习1课时)
第一课时: Section A: 1a, 1b, 1c,2a,2b, 2c,
第二课时: Section A: grammar focus, 3a, 3b, 4
第三课时: Section B: 1a, 1b, 2a, 2b, 2c
第四课时: Section B: 3a, 3b, 4a, 4b
第五课时：Self- check and reading
第六课时 复习
【本课时教学设计】
Ⅰ.Teaching Aims and Demands
1.Knowledge Objects
(1) Key Vocabulary
bulb, light bulb, microwave, oven, microwave oven, island
(2) Target Language
What is the microwave oven used for? It is used for cooking .
What do you think is the most helpful invention ? I think the most helpful invention is …
Why is that ? Because it helps/gives …
2.Ability Objects
Train the students' writing and speaking skills with the target language.
3.Moral Objects
If you are alone on a tiny island, what inventions would you like to have on the island with you?
Ⅱ.Teaching Key Points
1.Talk about the helpful inventions and annoying inventions.
2.Guide the students to discuss their opinions on the inventions.
Ⅲ.Teaching Difficult Points
1.Discuss the opinions on the inventions.
2.Use the target language to describe the inventions.
Ⅳ.Teaching Methods
1.Pairwork
2.Groupwork
Ⅴ.Teaching Aids
Some pictures of the helpful inventions and annoying inventions.
【学习辅助材料】
PPT课件
Ⅵ.Teaching Procedures
【教学程序】
Teaching and learning steps Learning contents T’s activities Ss’ activities Purpose Time
（1）
Revision
（从有关发明的话题入手，增加学生学习的兴趣.）
（PPT） T: What’s the invention? Who invented the inventions ? Can you tell me ?
T:The inventors are great.Are you great?
T: Let’s have a competition between two groups. Boys are Group 1, girls are Group 2. Let’s see which group will be the winner，OK?
1. Tell Ss the requirements .
T:First revise the passive voice.Look at the information and finish the blanks.
2. Ask two students to finish it.
3.T checks the answers.
( 老师奖励。)
4.Ask Ss to read the sentences after the teacher. 1.Students answers them.
2.Ss say yes.
3.Ss do it by themselves.
4.Ss read them together. 上课初提出疑问，引出比赛要求和奖励办法，能让学生对学习充满积极性。
复习旧知，为接下来学习新知做铺垫。这一过程不但可以很好地考查学生上节课所学知识，及时发现问题，查漏补缺。 5’
（2）Presentation
（2）Presentation
Part 3a
Words:light bulb microwave
oven
(PPT)
1. T: Look at the picture.What’s this?
2. T: And this?
light bulb (板书)
3. T: What’s this?
microwave oven(板书)
4.T:The inventions can be divided into helpful inventions and annoying inventions.I think the computer is a helpful invention.The gun is an annoying invention. Which do you think are helpful inventions/annoying inventions? 1. Ss :闹钟。
2.Ss:电灯泡。
3.Ss:微波炉。
4. Ss discuss the questions.
通过图片呈现新单词，创设情境来引发讨论： Which do you think are helpful inventions/annoying inventions?引导学生学会发表自己的观点。
6’
（3）
Practice
Part 3a.
(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 ?
light bulb A:What do you think is the most helpful invention ?
microwave oven B:I think the most helpful invention is …
A:Why is that?
B:It helps/gives…
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