课件21张PPT。 Unit 3 ComputersLearning objectives1.To grasp some important words and expressions related to computers in the passage.
2.To know about the development and applications of the computer.
3.To improve reading abilities by skimming, scanning, retelling and summarizing.
4.To use what you’ve learned to express your opinions and the reasons.videoabacuscalculatorhuge computerPClaptopPDArobotPredict: What's the passage about? Structure
and Textual Pattern AnalysisRead the passage quickly and find out the main idea of the passage.Task 1 The passage is mainly about the development of computers and their
applications. Read the passage quickly and find out the topic sentence of each paragraph.Task 2Over time I have been changed quite a lot. These changes only became possible as my memory improved.
Since the 1970s many new applications have been found for me.
Reading tips:1.The main idea usually appears in
the first paragraph or the last
paragraph of the passage.
2.The topic sentence usually
appears at the beginning or the
ending of the paragraph.Read para 1 aloud and finish the timeline below.Task 3calculating machinean analytical machineuniversal machineas large as a roomPClaptopoffices and homessizebrainpowerTopic sentence: Over time I have been changed quite a lot. In the order of timesupporting
details12543on transistorson very small chipsshape grew smallermemory became largerin tubesfirstthenlateras a resultover timeTask 4supporting
detailsRead para.2 and find out the improvement of my memory.Topic sentence：These changes only became possible as my memory improved. Since the 1970s I am applied to the fields including
______________,
______________,
______________,
______________,
______________,
______________
and ___________.communicationfinancetraderobotsmobile phonesmedical operationsspace rocketsTask4 : Read Paragraph 3 and make a list of applications Task 5supporting
detailsTopic sentence: Since 1970s many new applications have been found for me.Mind map:
The structure of the passageSummaryin tubes on transistors on very small chips
shape grew smaller
memory became larger a calculating machine an analytical machine
a universal machine grow in size and in brainpower
as large as a room PC laptop
used in offices and homes communication finance trade robot
mobile phones medical operations
space rockets Critical thinkingEvery coin has two sides. It is the same with the computer. It has a good effect on our life.On the other hand, it also brings many problems. Work in groups, have a debate.
Team A:They support the idea that the computer has a good effect on our life.
Team B: They support the idea that the computer also brings many problems.DebateAdvantages:
Read news, books and magazines
Watch movies and listen to music
Buy the things you like
Make friends easily
Communicate with friends conveniently
Enrich our knowledge about the world
Using online resources to studydisadvantages:
Waste a lot of time and money
Be addicted to computer games
Be harmful to health,especially eyesight
Offer harmful information
Reduce the time for real friends and family.
Weaken the ability to deal with relationships in the real world Creative
thinkingCreative thinkingCan you imagine what the computer will be like and do in the future? Let's design and create your own computer or robot.
Then describe it in your own words.
Name: ________ Appearance: ________
Size: ________ Character: ________
Ability: ________ Job: ________
AssignmentsWrite a composition about the advantages and disadvantages of the computer.
Surf the Internet to know more about the computer.
