Unit 3 Computers
Learning Aims
1. To learn about something about computers.
2. Reading and understanding, catching the history and information of the passage“who am I ?”.
Since the 1970s many new applications
Para III:
have been found out for me.
Topic sentence
Paragraph 1
Over time I have been changed quite a lot.
Supporting 1 calculating machine
these years?
Who am I ?
Skimming(Fast reading)
1. Who is the speaker –“I”—in this story?“ I ” am a _____c_o_m_p_u_t.er
2. What’s the main idea of this passage? A. The development of computers. B. The development and the applications of
Can you tell the development of computers? What do they have in common?
abacus
calculator
huge comlaptop
PC
What’s next?
What do you think will be the next development of computers?
Warming up——Guessing game
I can be used for calculating. Besides, I can also be used to type your homework, draw pictures, play games, watch movies, listen to music, communicate with your friends, gather information…Who am I?
details
2 transistors
3 chips
4 network
5 World Wide Web
Paragraph 3
Topic
Since the 1970s many new
sentence applications have been found for me.
Supporting 1 communications
What bad influences may computers have on us?
Warming up——Guessing game
I am a machine which moves very fast on four wheels. You need a license(执照) and must be very careful when you drive me. QQ,BYD, Benz and BMW are some famous kinds of me. Who am I?
Many new applications have been found for me, such as communications
finance/ trade/ robots/ mobile phones/ medical operations/ space Rockets.
What roles do computers play in the life of human beings?
Warming up——Guessing game
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?
T smaller. 3. Over time I have large memory so that I will not forget anything I have been told.
T 4. I was able to share my knowledge with others through the World Wide Web in the early 1960s.
details
2 analytical machine
3 universal machine
4 PC
5 laptop
Paragraph 2
Topic sentence
These changes only became possible as my memory improved.
Supporting 1 tubes
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?
1. Help with school work 2. Play games 3. Send or receive emails 4. Listen to music and watch films 5. Chat online 6. Search for information 7. Beautify photos 8. Online shopping
_a_n_d__h_o_m__e_s_____
Read para 2 and then tell the statement true or false. (1 min)
F 1. My shape didn’t change even though my memory improved.
F The information was stored in tubes, then o2n. TtrhaenoslidsteorrIs amnd, tlhaetelraorgnetrhIehcahvipesb. ecome. As I have grown older I have also grown
• What type of writing is it? expository writing 说明文
Tips: It often has a clear structure, which makes it easy for us to find the answers to the questions.
Warming up——Guessing game
I am a machine that you use to talk to other people even in a far-away place. I am connected by wire or radio. Now each of us often has a number. Who am I?
3.Functional item, how to tell the history about the computer.
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:
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.
details
2 finance 3 trade
4 robots 5 mobile phones
6 medical operations
7 space rockets
8 providing a life of high
quality
Read para 1 and and finish the timeline. (2 mins)
Time
Machine
In 1642
A _c_a_lc_u_l_a_t_in_g_
machine
About in _1_8_2_2_ An analytical
machine
In 1936
A _u_n_iv_e_r_s_a_l
machine
Applications
_S_i_m_p_l_if_y_difficult sums Think__lo_g_i_c_a_ll_y_
computers. C. A machine which is simple-minded. D. Computers may replace human beings.
3. The text is written in an order of __ti_m_e_ .