2020年人教版新课标高一必修2UNIT3COMPUTER—教案3

人教版新课标高一必修2Unit3Computer教案3 人教版新课标高一必修2 Unit 3 Computer教案3 Unit 3 Computer鈥斀贪3 TITLE=人教版新课标高一必修2 Unit 3 教学目标： （一）通过学习本单元，使学生了解计算机的发展历程，及其在当今社会的广泛应用。 （二）教会学生通过时间的先后顺序来表述一件事。 教学重点，难点： 迅速阅读捕捉重要信息并且理解长句复杂句。 Teaching procedures: Step1 Review new words Give the English meaning 1 计算_2科技,技术_ 3革命_ 4解决，解答_ 5 真实，现实_6私人的，亲自的_ 7设计师_ 8完全的，整个的_9探索，探究_ 10 目标，目的，球门，得分_ 11 从.时起_ 12 结果_ 13 如此以致于_14 应用，申请_ Word puzzle The technology develops so quickly that many new things appear in human beings life. Lets 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 puter 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 aording 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 puters. 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 peoples 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 puters were improved ? list of uses for puters what people did before puters 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: Aording to the informatin above,please give a brief introduction of uses of puters _ A The Inter is being important in our life. How much do you know about it? What is the Inter? The Inter is a large, worldwide collection of puter works. A work is small group of puters put together. The Inter is many different works from all over the world. These works are called the Inter. Once you have learned to use the Inter, 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 Inter. The Web is like a big electronic book with millions of pages. These pages are called homepages (主页). You can find information about almost anything in the world on these pages. For example, you can use the Inter 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. Its 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. . Write a message, type in the persons e-mail address, then send the message across the Inter. People dont need to use stamps, envelopes or go to the post office since the invention of the Inter. Quick, easy and interestingthats the Inter! () 1. What is the Inter? A. Its a big puter.B. Its a small group of puters. C. Its lots of puter works. D. Its the World Wide Web ()2. What does “ talk to your friends on the pages” mean? It means_ Ayou can talk to your friends face to face Byou can type your words in the puter and then send them to your friends across the Inter C. you talk to your friends through the same puter 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 dont have to pay any moneyB.its faster and cheaper C. they dont 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 Inter has long been discussed in US. For some parents the Inter 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 (预防措施) the wilds of the Inter can be safely navigated (航行). Kids have to be on-line. If we tell our kids they cant have aess (进入) to the Inter 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 Inter 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 aess would be to use what is known as a content screener (过滤). 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