人教版高中英语必修二Unit3《Computers---Warmingupandreading》课件(共24张)

Alan Turing
4.What were you called in 1936?
.
A universal machine
1. Read the passage and finish the timeline below.
1642 The computer began as a calculating machine．
abacus
I am very small. I can be used for calculating. In China, a lot of students use me when solving mathematical problems.
Do you know who I am?
calБайду номын сангаасulator
PC laptop PDA
virtual keyboards keyboard-vest
What’s the main idea of the text? A. What a computer is. B. What a computer is used for. C. How the computer becomes popular. D. The history of the computer
Paragraph 2
Topic
These changes only became
sentence possible as my memory
improved
•tubes
Supporting •transistors
details
•chips
•network
•World Wide Web
Topic sentence

years?
Who am I ?
Fast reading
1. Choose the best answer
What’s the main idea of the text? A. The computer wants to find “who he is”. B. The functional change of the computer. C. The computer becomes popular around
Warming up——Guessing game
I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lonely because they don’t like me now. Do you know who I am?
Over time I have been changed quite a lot.
These changes only became possible as my memory improved.
Calculating machine Analytical machine Universal machine PC laptop
Unit 3 Computers
Warming up——Guessing game
With the development of science and technology, many new things appear in human being’s life. Let’s guess what they are:
Warming up——Guessing game

• Help students to express their own opinions in English. Teach them how to make decisions and reasoning. Learn to introduce something in time sequence.
I was brought into people’s homes.
True or False?
F 1. In 1642 I began as a calculating machine and
could solve any cmaalctuhleamtiantgical problem.
F 2. My real father was CAhlarnleTsuBrianbgbage, who
• Teaching aims and demands:
• This unit is concerned with teaching students a little more of the history and development of computers and their applications.
• An abacus is an old calculating machine used in China until now.
• A huge computer is built to solve some mathematical problems. But it is too big.
abacus
huge computer calculator
personal computer notebook computer
Pre-reading

1) You know, Dorothy, I have one thing in common with you． 2) I have noting in common with him, so how can I get along well with him. 3) In common with many other classmates, I like playing basketball. common knowledge/ sense 常识 common people 普通人，老百姓
7. use the Internet to research information for school tasks 8. buy things on line 9. look at photographs on the computer 10. read news both at home and abroad, read books and magazines
of 1st
machine in France in
paragraph 1642.
Topic sentence
of 2nd
My memory improved.
paragraph
Topic sentence
of 3rd
Since the 1970s many
paragraph new applications have
1. use a computer for school work 2. play games on the computer 3. send emails to friends 4. download music and films 5. surf the web for fun 6. take part in chat groups

What is it in English??
CPU (central processing Unit)
中央处理器
What is it in English??
RAM
(随机存储器)
(Random Access Memory )
What is it in English??
hard disc 硬盘
Riddles(谜语):
I am a machine which is a good helper in doing house work. I wash clothes for people.
Who am I ?
washing machine
Riddles(谜语):
• A machine that you use to talk to other
How much do you know
about a computer???
Give the English name of the following pictures of the computer components (组件)
What is it in English??
Main board(主板)
people even in a far-away place. • We are connected by wire or radio. •Now each of us often has a number.
Who am I ?
telephone
Riddles(谜语):
With this you can watch different programmers just at home. I’m a machine that has a screen with moving pictures and sounds. But watching me too much is bad for your eyes.

Robot
Robot is a mechanical device that sometimes resembles a human and is capable of performing a variety of complex human tasks on command or by being programmed in advance.
Personal Digital Assistant
A very small light computer that you can carry with you, and that you use to store information such as telephone numbers, addresses, and appointments. Some PDAs can send and receive email, and connect to the Internet.
A PC is a personal computer which can solve all kinds of problems and is used widely now.
A PC / desktop
A laptop / notebook computer
A notebook computer is a kind of useful computer which can be taken conveniently like a notebook.
A calculator
A calculator is a new calculating machine which can solve a large number of mathematical problems .

● I was built as an Analytical Machine by Charles Babbage.”
●”My real father was Alan Turing ....”
● I was able to share my knowledge with others through the World Wide Web.
1. Review the passage 2. Do Ex. 1-3 on P19-20. 3. Read the story about
Bill Gates.
……
➢ What do you like to eat? ➢ What are your hobbies? ➢ What is your newest
function(功能)? ➢ Can you say something
about your future plan? etc.
Homeatical problems.
F
2. People began to realize that the computer got
cleverer and quicker with time passing. T
3. The computer began to serve the human race
Nose-top keyboard-vest
What about in the future?
robot
Task 3. Role-play
Suppose you are a reporter. Now you are interviewing Mr. / Miss Computer.
Sample questions:

tubes transistors chips network World Wide Web
Since the 1970s many new applications have been found for me.
＊ communications ＊finance
＊ trade
＊ robots
＊ mobile phones
2. Where can we usually find the topic sentence? The beginning of the passage.
Task: The passage has three paragraphs. Find out the topic sentence of each paragraph, and the details that are used to support the topic sentences. Then complete the chart in activity 2.
years?
Who am I ?
Fast reading
1. Choose the best answer
What’s the main idea of the text? A. The computer wants to find “who he is”. B. The functional change of the computer. C. The computer becomes popular around
What bad influences may computers have on us?
Bad for eyes Children may be addicted上瘾to playing computer games.

have been found in many fields(领域).
10. _t_r_a_d_e__; robots; mobile phones;
11.__m__e_d_i_c_a_l _o_p_e_ra_t_i_o_n_s_; space rockets
step 4 post Reading
2) Can you work out the mind map (思维 导图)of the development of computers?
abacus calculator huge
PC
computer
What’s next?
robot
PDA
laptop
What’s next?
Like a piece of “paper”
Like a “handbag”
like a nightstool
like a ring, …
Reading
step 1 Fast-reading
Read the text quickly and finish the following exercises: 1.In the passage, “I” refers to _a_c_o_m_p_u_t_e_r. 2.the topic sentence of each paragraph.
Activity1: summary Activity2: discussion
Summary
It began as a c_a_l_cu_l_a_ti_n_g machine in 1642 in France. In 1822 it was built as an _an_a_l_y_ti_c_almachine. Then in 1936 Alan Turing wrote a book and built au_n_i_v_er_s_a_l machine. As time_w_e_n_t _b_y, it was made smaller but its memory grew _la_r_g_e_r _ and _la_r_g_er_. In the 1960s they gave it a family connected by a _n_e_tw_o_r_k. Now people call it the Internet. It was used in _o_f_fi_c_es_ and _h_om__e_s_ since the 1970s. Since its birth it has truly been built to help the _h_u_m_a_n_ _ra_c_e__.

calculator
4
I can be used for calculating. Besides, I can also be used for watching DVD, sending e-mail and communicating through the Internet. However, I am not a PC, because I’m small enough for you to take me with you.
Do you know who I am?
abacus
3
I am very small. I can be used for calculating. In China, a lot of students use me when solving mathematical problems.
Do you know who I am?
1
Guess!
A handbag?
A toy?
2
Guess more:
I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lonely because they don’t like me now.
it has.
F
10
Comprehending:
1. Choose the best answers
1) What’s the main idea of the text? A. The computer wants to find “who he is”. B. The functional change of the computer. C. The computer becomes popular around the world. D. The history of the computer.

F 1. In 1642 I began as a calculating machine and
could solve any calculating mathematical problem. Babbage, who Alan Turing F 2. My real father was Charles wrote a book and build me in 1936. T 3. After I got my new transistors in the 1960s, I became smaller but cleverer and quicker. T 4. I was brought into people’s homes in the 1970s. 5. Since my birth I have been built to F take the place of human race. serve
Warming up
• Look at the pictures. Talk about each of them. Discuss what they have in common by using the following expression in your discussion. – I think that … – In my opinion… – I believe that… – Why do you think so? – What’s your reason?
• A notebook computer is a kind of useful computer which can be taken conveniently like a notebook.
Discussion

Disadvantages
We may…, 1. get too addicted (沉溺于)to it 2.abandon (沉迷于) themselves to the
computer games 3. waste too much time in playing computer
games 4. be cheated (欺骗)by someone on line 5. leak our private information
…
Every coin has two sides. We should make good use of it to
bring us benefits instead of something bad.
Thank you for your listening!
A laptop can be taken conveniently like a
notebook.
laptop
PDA
Personal digital assistant. ['dɪdʒɪt(ə)l]
PDAs can store information , send and receive emails, and connect to the Internet.
So the whole passage is mainly about ___t_h_e_d_e_v_e_lo_p_m_e_n_t_o_f__c_om__pu_t_e_r_s.___.
step 2 careful-reading
Scan the text and find more information about computers. Then fill in the two forms below.

Para- Para- Paragraph 1 graph 2 graph 3
Topic sentence
Supporting details
(key words)
Topic sentence
Paragraph 1
Over time I have been changed quite a lot.
Do you know who I am?
abacus
[`æ bəkəs] n. 算盘
I am very small. I can be used for calculating. In our class, a lot of students use me to solve maths problems. Do you know who I am?
Charles Babbage.
1642 The computer began as a__c_a_l_c_u_l_a_t_in_g__m__a_c__h_in__e___.
Task 3
Detail reading
Find the topic sentence of each paragraph and the supporting details.
A topic sentence is usually the first or last sentence of a paragraph.
Task 4
Discuss
& speaking
What can we do on a computer in our daily life?
search for some information
Answer the questions.