(人教版)必修二Unit3computers学案

1、高一英语学案时间：2019年12月13日班级 姓名课题：Unit3 Computers学!教师寄语：Learn as if you were going to live forever. Live as if you were going to die tomorrow.案!Lear ning aims:1. To lear n how to use the new words and expressi ons.2. To develop the stude nts ability of read ing.装!3. To motivate the stude nts in terest in

2、scie nee and tech no logy.学习过程I . Pre-reading by talking about how computer worksHow does a computer work?A computer has four main parts: the arithmetic and logic unit (ALU), the con trol un it, the memory, and the in put and output devices (collectively termed I/O). These parts are in terc onn ecte

3、d by groups of wires.线:The control unit, ALU, registers, and basic I/O (and often other hardware closely linked with these) are collectively known as a central processing unit (CPU). Early CPUs were comprised of many separate components but si nee the mid-1970s CPUs have typically been constructed o

4、n a single integrated circuit called a microprocessor.II . Preview the new words.1. 计算 vt. 7. analytical2.普遍的/宇宙的adj.8.i ntellige nee3.工艺：科技;技术n.9. solve4.革命n.lO.applicati on5.真实：事实：现实n.11.fi nance6.可移动的adj.12.explore第1页/共8页皿.During-readingStep I Fast readi ng-Read the passage quickly and sile ntly,

5、 and the n an swer the follow ing questi ons.1. Who is the speaker in this story?2. What was the computer called in 1936?3. What happened to the computer in the 1970s?4. Look at these inventions. Can you put them in an order according to the time whe n they appeared?()an alytical mach ine () laptop(

6、) calculati ng machi ne()robot() PC() uni versal machi neStep II Careful reading-Read the passage again and answer the following questi ons.Task 1 Read the passage for the second time and find the topic sentences of each paragraph.Par.1Par.2Par.What is the main idea of the passage?Task 2I . Read the

7、 passage for the third time and finish the timeline below.16421822The an alytical mach ine was made by Charles Babbage.19361940sThe first family of computers was conn ected to each other.1970sNowH . Please finish the following exercise.1. Tra nslati onAt that time it was con sidered a tech no logica

8、l revoluti on and the start of my “ artificial in tellige nee”.2. Which sentence in the passage can be replaced by the follow ing one?With time going by, I grew smaller in size.Step III SummaryStep IV DebateHow computers have changed our lives? What are the disadvantages anddisadva ntage of computer

9、sgDiscuss with your group members)Step V Homework请你根据以下要点以 My view on computers为题写一篇英文短文。要点：1. 电脑已走进普通人的家庭；2. 电脑的优势：方便查找信息；可以玩游戏、聊天、听音乐等；发送电子邮件和朋友保持联系等电脑的劣势：长间使用电脑危害身体健康；有些人痴迷于网络游戏，浪费了许多宝贵的时间3. 你的观点：注意：1可根据内容需要适当增加细节2. 词数：120150参考词汇：对 上瘾be addicted to 方便 convenience第5页/共 8页课堂设计流程课题：Computers第一步：导入本节课题“ Computers”第二步：展示学习目标(learning a