人教版高中英语必修二Unit-3《Computers》(Warming-up-and-reading)课件.ppt

1、Teaching aims and demands:This unit is concerned with teaching students a little more of the history and development of computers and their applications.Help students to express their own opinions in English.Teach them how to make decisions and reasoning.Learn to introduce something in time sequence

2、.Teach them how to use some of the words and expressions in the unit.Learn to use The Present Perfect Passive Voice.kxb ax2bxc 单击此处进入单击此处进入 活页规范训练活页规范训练Warming upLook at the pictures.Talk about each of them.Discuss what they have in common by using the following expression in your discussion.I think

3、 that In my opinionI believe thatWhy do you think so?Whats your reason?abacushuge computercalculatorpersonal computernotebook computer Pre-reading1.What do you know about computers?2.How have computers changed our lives?Thinking An abacus is an old calculating machine used in China until now.A huge

4、computer is built to solve some mathematical problems.But it is too big.A calculator is a new calculating machine which can solve a large number of mathematical problems.A PC is a personal computer which can solve all kinds of problems and is widely used now.A notebook computer is a kind of useful c

5、omputer which can be taken conveniently like a notebook.How was so much informationgiven in such a short space?What do you think is the tone of the writing?Discussion 1.How was so much information given in such a short space?The writing is clear and does not waste words.There are no descriptions.It

6、just gives us facts.It uses names but it only tells us about peoples work with computers.It is written in the first person but it keeps with the facts.It is written as if the writer was a computer with no feelings.Suggested answer:2.What do you think is the tone of the writing?It is natural and make

7、s me want to find out more.I do not think the writing is trying to persuade me to believe something but it does make me interested in the topic.Fast reading 1 What happened to you in 1822?2 Where were you in 1642?3 What were you called in 1936?4 What happened to you in the 1970s?In France.I was buil

8、t as an Analytical Machine by Babbage.A universal machine.I was brought into peoples homes.True or False?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 build me in 1936.3.After I got my new transistors in

9、the 1960s,I became smaller but cleverer and quicker.4.I was brought into peoples homes in the 1970s.5.Since my birth I have been built to take the place of human race.FFTTFcalculatingAlan Turing serveTask 1:Look at the timeline below.Fill in the blanks with information from the reading text.1642:The

10、 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.1970s:Computers connect people all over the world together.Now:Computers were used in offices

11、 and homes.Careful-reading1960s:The first family of computers was connected to each other.Conclusion of the text1.Whats the main idea of the text?2.How did computers develop?The main idea of the text is the history and development of computers.Calculating machineAnalytical machineUniversal machineAr

12、tificial intelligenceComputerInternetShould high school students surf the internet?I think high school students should surf the internet because(first,secondly,thirdly)I think high school students should not surf the internet because(first,secondly,thirdly)Discussion ConclusionThere is no doubt that

13、 computer has two sides,too.If we make good use of it,it will make our lives more colourful and convenient.But dont lose yourself in playing computers.Just remember:Keep fit,study well and work hard.Comprehending 1.Who is the speaker in this story?2.Write down three sentences from the story to suppo

14、rt your idea.A computer.Then in 1822 I was built as an Analytical machine by Charles Babbage.My real father was Alan Turing,However,people thought I was simple-minded until they discovered I had“artifical intelligence.”1642:_:The Analytical Machine was made by Charles Babbage.1936:_ The computer beg

15、an as a calculating machine1822.Alan Turing wrote a book to describe how computer could be made.Timeline 1960s:_:The first family of computers was connected to each other.1970s:_Now:_ Computers had new transistors and become smaller.1960s Computers were brought intopeoples homes.Computers connect people all over the world together.Timeline