Learning about Language优秀公开课教案

吉安三中

Unit 3

Computers

Period 2

文本研读课

学习目标

1.了解电脑的发展历史,掌握与电脑有关的科技词汇。

2.全面培养学生的阅读能力,重点培养概括段落大意和理解文章主旨大意的能力。

3.理解并熟练掌握下列重点句型和结构的用法。

(1)Over time I have been changed quite a lot. (2)I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage. (3)As a result I totally changed my shape. 自主预习

Guess who I am? It’s a long history...

I began as a calculating machine.

Over time I was built as an analytical machine by Charles Babbage.

From then on,I grew rapidly both in size and in brainpower.

As time went by,I was made smaller.First as a PC.

Then as a laptop.

吉安三中

As a result my memory became so large that even I couldn’t believe it! I am a computer! 思考导引

As we can see from the pictures,computers have developed fast lately,so are you interested in exploring more detailed information? 课堂探究

Step 1

Reading

1.Skimming

A.Read the text quickly and try to find out the topic sentence for each paragraph. Matching work:

Topic sentences

1.These changes only became possible as my memory improved. Paragraphs

Paragraph 1 2.Since the 1970s many new applications have been found for me. Paragraph 2 3.Over time I have been changed quite a lot. Paragraph 3 2.Scanning

Draw the timeline(时光轴)and find the relevant(相关的)events.

The computer began as a calculating machine. 1822

. 1936

.

The computer has grown as large as a room. 1960s

. 1970s

Computers were used in offices and homes. Now

. 3.Careful reading

A.Read through the text carefully and then fill in the blanks

Although he was young,he could

(1)

difficult

(2)

.After two hundred years he was built as an

(3)

machine by Charles Babbage.He could think

(4)

.It was considered as a

(5)

revolution and start of his

(6)

intelligence.By the 1940s he grew as large as a room,This

(7)

worried his designers.As time

(8)

by,he was made smaller.First as a

(9)

computer (PC),then a laptop. With time going by,his memory improved too. As a result he

(10)

changed his shape.Over time his memory became

(11)

large

(12)

even he himself couldn’t believe it!Since the 1970s many new

(13)

have been found for him.He has even been put into

(14)

and sent to

(15)

the Moon and

吉安三中

Mars.Anyhow he knows his

(16)

is to provide humans with a life of high quality. B.Read the text again and then do the true or false exercises. 1.In 1642 I began as a calculating machine and could solve any mathematical problem.(

) 2.My real father was Charles Babbage,who wrote a book and built me in 1936.(

) 3.After I got my new transistors in the 1960s,I became smaller but cleverer and quicker.(

) 4.I was brought into people’s homes in the 1970s.(

) 5.Since my birth I have been built to take the place of human race.(

) Step 2

Cracking the hard points

Observe the sentences carefully and translate them into Chinese. 1.Over time I have been changed quite a lot.

2.As a result I totally changed my shape.

3.I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage.

4.After all,with the help of my electronic brain which never forgets anything,using my intelligence is what I’m all about.

5.This means that it should clean the house,mop the floors,cook the dinner and deal with telephone calls.

Step 3.Consolidation

Read the text carefully again and complete the following charts.

Topic sentence

Paragraph 1 Over time I have been changed quite a lot. Paragraph 2 possible improved. as my Paragraph 3 memory applications have been found for me. 1.

1.calculating machine Supporting details 2.analytical machine 3.universal machine 4.PC 5.laptop 1.

2.

3.

4.

5.

2.

3.

4.

5.

6.

7.

8.

These changes only became Since the 1970s many new

Step 4.Post-reading

Have a debate: Computers have good effects on our life. You may begin by... 1.Great changes have taken place since computers came into people’s life...

吉安三中

2.Over time... 3.By using computers,we deal with... 4.We can’t live without... 5.I don’t agree...

6.We still...with the help of... 7.As a result,it... 8.Computers have brought... 9.so...that... 10.I don’t think there is anything in common...

Some useful words,phrases and sentence patterns

anyhow, from then on,totally,however, in a way,personally,over time in my opinion, what’s more,what’s worse,in addition,all in all

课后提升

1.And my memory became so large that

even I couldn’t believe it!我的存储容量变得如此之大,连我自己也不能相信!

so...that

such...that

如此……以至于,引导结果状语从句,so后跟形容词或副词,such 后跟名词。

A.句意:He speaks so fast that I couldn’t follow him.

. B.用so,such 填空

(1)It was

beautiful a night that we went for a walk. (2)It is

a big job that we’ll have to be careful. (3)He has never done

difficult work. (4)I haven’t seen Ann for

long that I’ve forgotten what she looks like. 2.Since the 1970s many new applications have been found for me.从二十世纪七十年代起,我又被开发了许多新的用途。

have/has been done 完成时的被动式。

A.句意:Ten apartments have been sold in the past one hour.

B.用所给词的适当形式填空。

1.This book

into many languages.(translate)

2.These rooms

yet.(not,clean)

3.Have these cars

?(repair)

4.How many new words

this term?(learn)

Homework: Write a short passage on How Computers Have Changed Our Lives. 参考答案课堂探究

1.Skimming

Topic sentences

1.These changes only became possible as my memory improved.

Paragraphs

Paragraph 2

吉安三中

2.Since the 1970s many new applications have been found for me. Paragraph 3 3.Over time I have been changed quite a lot. Paragraph 1 2.Scanning

1642

The computer began as a calculating machine. 1822

The analytical machine was made by Charles Babbage. 1936

The computer grew rapidly both in size and in brainpower. 1940s

The computer had grown as large as a room. 1960s

The first family of computers were connected to each other. 1970s

Computers were used in offices and homes. Now

Computers have connected people all over the world. 3.Careful reading

A.(1)simplify

(2)sums

(3)analytical

(4)logically

(5)technological

(6)artificial

(7)reality

(8)went

(9)Personal

(10)totally

(11)so

(12)that

(13)applications

(14)rockets

(15)explore

(16)goal B.(1)F

(2)F

(3)T

(4)T

(5)F Step 2

Cracking the hard points

1.经过一段时间我已被改变了很多。

2.结果,我已完全改变了我的形状。

3.我发育缓慢,差不多两百年后,查尔斯·巴比奇把我制成一台分析机。

4.不管怎样,在我过目不忘电子眼的帮助下,运用智能就是我的一切。

5.这就是说,它可以打扫房间、拖地、做饭、应对来电。

Step 3

Consolidation

Paragraph 2

1.tubes

2.transistors

3.chips

4.network

5.World Wide Web Paragraph 3

1.communication

2.finance

3.trade

4.robots

5.mobile phones

6.medical operations

7.space rockets

8.providing a life of high quality 课后提升

A.句意:他说得太快,我没听懂。

B.填空

1.so

2.such

3.such

4.so A.句意:在过去的一小时内,十套公寓已被售出。

B.用所给词的适当形式填空。

1.has been translated into 2.have not been cleaned 3.been repaired 4.have been learned