人教版新課標(biāo)高一必修2 Unit 3 Computer—教案3

人教版新課標(biāo)高一必修2 Unit 3 Computer—教案3 Unit 3 Computer鈥斀貪3 TITLE=人教版新課標(biāo)高一必修2 Unit 3  教學(xué)目標(biāo)： （一）通過學(xué)習(xí)本單元，使學(xué)生了解計(jì)算機(jī)的發(fā)展歷程，及其在當(dāng)今社會(huì)的廣泛應(yīng)用。 （二）教會(huì)學(xué)生通過時(shí)間的先后順序來表述一件事。 教學(xué)重點(diǎn)，難點(diǎn)： 迅速閱讀捕捉重要信息并且理解長句復(fù)雜句。 Teaching procedures: Step1 Review new words Give the English meaning 1 計(jì)算_____________________2科技,技術(shù)_________________ 3革命________________ 4解決，解答_____________ 5 真實(shí)，現(xiàn)實(shí)___________6私人的，親自的_______ 7設(shè)計(jì)師_________________ 8完全的，整個(gè)的__________9探索，探究___________ 10 目標(biāo)，目的，球門，得分_________________ 11 從…….時(shí)起_____________________  12 結(jié)果_____________ 13 如此……以致于___________14 應(yīng)用，申請_______________ Word puzzle The technology develops so quickly that many new things appear in human being’s life. Let’s guess what they are: 1.An old calculating machine used in China until now.( ) 2.It is built to solve some mathematical problems. But it is too big. () 3.It is a new calculating machine which can solve a large number of mathematical problems. () 4.It is a personal computer which can solve all kinds of problems and is used widely now.( ) Step 2 Pre-reading Look at the pictures on P17 and put them in an order according to the time ( ) analytical machine ( ) laptop( ) calculating machine ( ) robot ( ) PC ( ) universal machine Step 3 Skimming The main idea of the passage: This is a short ________ of the __________ of computers. Find out the topic sentences of each paragraph 1 ______________________________________________________ 2____________________________________________________________ 3__________________________________________________________   Step4 Scanning  True or False? In 1642 I began as a calculating machine and could solve any mathematical problem. ( ) My real father was Charles Babbage, who wrote a book and build me in 1936. () After I got my new transistors in the 1960s, I became smaller but cleverer and quicker. ( ) 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 5 Careful reading 1642:_________________________________________________________________________ Nearly two hundred years after 1642 : ______________________________________________ 1936: ________________________________________________________________________ 1940s:________________________________________________________________________ 1960s:________________________________________________________________________ 1970s:________________________________________________________________________ Now: ________________________________________________________________________ Step 6 Discussion What have people done since computers were improved ? list of uses for computers what people did before computers   writing letters, sending telegrams, postcards   writing by hand or typewrite   going to the cinema, watching TV   Listening to radio or recorder     looking up in reference books/magazines, going to library   writing everything down and put into files   shopping in a shop or market   Summary: According to the informatin above,please give a brief introduction of uses of computers _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________   A   The Internet is becoming important in our life. How much do you know about it?  What is the Internet?  The Internet is a large, worldwide collection of computer networks. A network is small group of computers put together. The Internet is many different networks from all over the world. These networks are called the Internet. Once you have learned to use the Internet, you can do a lot of interesting things on the World Wide Web.  What is the World Wide Web?  The World Wide Web has been the most popular development of the Internet. The Web is like a big electronic book with millions of pages. These pages are called homepages (主頁).  You can find information about almost anything in the world on these pages. For example, you can use the Internet instead of a library to find information for your homework. You can also find information about your favorite sport or film star, talk to your friends or even do some shopping on the pages. Most pages have words, pictures and even sound or music.  What is e-mail? Electronic mail (e-mail) is a way of sending messages to other people. It’s much quicker and cheaper than sending a letter.  If you want to use e-mail, you must have an e-mail address. This address must have letters and dots and an “@” (meaning “at”). This is what an address looks like: Emily @ star. net.  Write a message, type in the person’s e-mail address, then send the message across the Internet. People don’t need to use stamps, envelopes or go to the post office since the invention of the Internet.  Quick, easy and interesting—that’s the Internet! () 1. What is the Internet? A. It’s a big computer.B. It’s a small group of computers. C. It’s lots of computer networks. D. It’s the World Wide Web ()2. What does “ talk to your friends on the pages” mean? It means_____ A．you can talk to your friends face to face B．you can type your words in the computer and then send them to your friends across the Internet C. you talk to your friends through the same computer D. you go to your friends’ houses to talk to them () 3. Why do people like to use e-mail to send message to their friends and families?Because_______ A. they don’t have to pay any moneyB.it’s faster and cheaper C. they don’t need to have stamps, envelopes or address D. sending e-mail is interesting () 4. What does the “e” mean in e-mail? It means______ A. easyB. electricalC. electronicD.enjoyable B How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in US. For some parents the Internet can seem like a jungle, filled with danger for their children. But jungles contain wonders as well as hazards and, with good guides, some education and a few precautions (預(yù)防措施) the wilds of the Internet can be safely navigated (航行). Kids have to be on-line. If we tell our kids they cant have access (進(jìn)入) to the Internet were cutting them off from their future, said an expert. Most kids have started to learn to use search engines. Many of them are great for finding tons of interesting Internet sites, and they can also locate places where you might not want your kids to go. There are search engines designed just for kids. A certain software contains only sites that have been selected as safe. But the most popular that was to limit access would be to use what is known as a content screener (過濾). But this cant be wholly reliable, and the best thing parents can do is to talk to their kids and let them know whats OK or not OK to see or do on the Internet. Another way is that mum or dad is nearby when the child is surfing (瀏覽) the Internet. A few other tips: ●Dont put the PC in a childs room but keep it in an area where mum or dad can keep an eye on things. That also makes the Internet more of a family activity.  ●Ask your child what he

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