高中英語 Unit 3 Computers Reading Who am I教學(xué)設(shè)計(jì) 新人教版必修2

1、Unit 3 Computers一、教學(xué)對(duì)象分析本節(jié)課的教學(xué)對(duì)象為高一上學(xué)期的學(xué)生，在經(jīng)歷了必修1的學(xué)習(xí)過程之后，學(xué)生已經(jīng)對(duì)高中的英語學(xué)習(xí)有了初步的了解和感知，但仍需要訓(xùn)練和提高語篇的理解，歸納和分析的能力。本節(jié)課的一系列活動(dòng)，就是為學(xué)生的語篇閱讀打開一扇窗戶，培養(yǎng)學(xué)生的語篇意識(shí)，使其更全面的理解文章內(nèi)容，歸納主旨大意。學(xué)生在前一節(jié)課的詞匯學(xué)習(xí)中，已經(jīng)掌握了文中所出現(xiàn)的大部分生詞，這為本節(jié)課的閱讀掃清了障礙，能讓學(xué)生更好的專注于語篇結(jié)構(gòu)的理解，而不必因?yàn)樯~過多影響閱讀效果。高一學(xué)生活潑好動(dòng)，思維活躍，愿意積極的投入到思考和各種活動(dòng)中。這就需要老師積極熱情的引導(dǎo)，合理設(shè)計(jì)活動(dòng)環(huán)節(jié)，有條理的分解

2、知識(shí)層次，幫助學(xué)生循序漸進(jìn)的掌握語篇的處理能力。二、教材內(nèi)容分析本節(jié)課閱讀材料是本單元的主要閱讀篇章，屬科普類說明文，講述了計(jì)算機(jī)的發(fā)展歷史及其在當(dāng)今世界各個(gè)領(lǐng)域的應(yīng)用。內(nèi)容較為抽象，且有一些專業(yè)術(shù)語，對(duì)高一學(xué)生來說有一定的難度。但寫作手法上以計(jì)算機(jī)為第一人稱進(jìn)行自白，這種擬人的手法能夠激發(fā)學(xué)生的閱讀興趣，也使得文章更淺顯易懂。本文共分3個(gè)段落，以時(shí)間為順序說明計(jì)算機(jī)的發(fā)展歷史，且每段的第一句話均為該段落的主題句。這種結(jié)構(gòu)的語篇非常適合用來啟發(fā)和引導(dǎo)學(xué)生尋找段落的主題句，并進(jìn)一步歸納文章主旨大意。同時(shí)配以適當(dāng)?shù)木毩?xí)，幫助學(xué)生歸納總結(jié)出方法，在練習(xí)中運(yùn)用這些方法，從而提升對(duì)語篇的全局意識(shí)，增強(qiáng)對(duì)

3、語篇的解題能力。三、教學(xué)目標(biāo)根據(jù)以上學(xué)情和教材分析，本節(jié)課的重點(diǎn)是教會(huì)學(xué)生如何正確尋找段落主題句，歸納語篇主旨大意。以這個(gè)任務(wù)為主線，貫穿整個(gè)教學(xué)活動(dòng)，讓學(xué)生眼，耳，手并用，通過自主學(xué)習(xí)，小組學(xué)習(xí)等教學(xué)活動(dòng)，在語境中觀察，總結(jié)，實(shí)踐語篇分析方法，并最終從閱讀理解的三個(gè)維度達(dá)到以下目標(biāo)：1.信息知識(shí) 了解計(jì)算機(jī)的發(fā)展歷史及其在當(dāng)今社會(huì)各個(gè)領(lǐng)域的廣泛應(yīng)用。2.語言知識(shí) 理解和掌握與計(jì)算機(jī)相關(guān)的詞匯。3.語篇知識(shí) 領(lǐng)悟和實(shí)踐在語篇中尋找主題句的方法，學(xué)會(huì)歸納文章主旨大意。四、教學(xué)過程Step I Lead-in (3 mins)（1）英文網(wǎng)站截圖導(dǎo)入。教師在PPT上呈現(xiàn)一些英文網(wǎng)站的截圖圖片，讓學(xué)生

4、思考有關(guān)英文網(wǎng)站上文章理解的問題，提出兩個(gè)問題：Do you often go to the English website?Do you have some difficulty in understanding the article on the website?借助這兩個(gè)問題引發(fā)學(xué)生的思考，對(duì)下面的閱讀活動(dòng)起到預(yù)熱的作用，以此導(dǎo)入本課的課題。（2）揭題 針對(duì)英文網(wǎng)站上的很多說明文，本節(jié)課將教授學(xué)生如何尋找主題句，如何利用主題句概括文章主旨大意，繼而更好的理解說明文。意圖說明 這個(gè)年齡的學(xué)生好奇心強(qiáng)，喜歡探索問題，英文網(wǎng)站是他們獲取信息的優(yōu)質(zhì)資源，但語言卻成為很大的障礙。本環(huán)節(jié)所展示的圖

5、片配合老師的啟發(fā)性問題用以引發(fā)學(xué)生的思考，如何才能更好的理解說明文。用分析的方法引出本節(jié)課的重點(diǎn)內(nèi)容：要想更好的理解說明文，需要概括出文章的主旨大意，而段落大意是文章主旨大意的重要基礎(chǔ)，尋找主題句是確定段落大意的重要方法之一。Step II reading and comprehending ( 25 mins )（1）讓學(xué)生快速瀏覽文章并找出每段的主題句。提問，什么是主題句？如何尋找主題句？讓學(xué)生分別回答，并找出每段的主題句。What is topic sentence? a leading sentenceHow to find out the topic sentence for eac

6、h paragraph? beginning/ ending / no topic sentence（2）提問過后，確定每個(gè)段落的主題句。繼而引發(fā)學(xué)生的思考,如何才能知道自己所找到的主題句是正確的？How do you know that the topic sentence you have found out is right?學(xué)生會(huì)說出在文中找到的一些論點(diǎn)，得出結(jié)論：主題句印證：要點(diǎn)支持 We need some supporting details.（3）讀課文，完成課堂練習(xí)1，同時(shí)找出支持每段主題句的細(xì)節(jié)，即supporting details. 待學(xué)生完成后，請(qǐng)3名同學(xué)在黑板上寫出

7、他們的答案。課堂練習(xí)1Para 1 Over time I _ quite a lot.1642: The computer began as a _.1822: The _ was made by Charles Babbage.1936: The computer could be made to work as a _.From then on, it grew rapidly both in size and brainpower.1940s: The computer had grown _ a room.1960s: The first family of computers wa

8、s connected to each other.1970s: First as _ and then as a _, computers were used in offices and homes.Now: Computers connect people all over the world together.Para 2 These changes only became possible as my _ improved.First it was stored in _then on _later on very small _.Over time my _ has develop

9、ed so much that, like an _ , I never forget anything I have been told.I was so lonely until they gave me a family connected by a _. We can share knowledge through the _.Para 3 Since the 1970s many new _ have been found for me.I have become very important in communication, _and trade. I have also bee

10、n put into _ and _ and used to made _ as well as help with _. My goal is to _ humans with a life of _. （4）結(jié)合課件訂正答案。答案：Para1: have been changed, calculating machine, analytical machine, universal machine, as large as, a PC, laptop.Para2: memory, tubes, transistors, chips, memory, elephant, network, W

11、orld Wide Web.Para3: applications, finance, robots, space rockets, mobile phone, medical operations, provide, high quality.（5）提問學(xué)生，讓他們找出每段主題句的支持點(diǎn)，結(jié)合課件，給出答案。同時(shí)指出，支撐論點(diǎn)可以是單詞，短語或句子。意圖說明此環(huán)節(jié)為本節(jié)課的核心部分，是本節(jié)課教學(xué)的重點(diǎn)環(huán)節(jié)。通過引導(dǎo)和啟發(fā)學(xué)生，找出段落的主題句，利用對(duì)表格的分析得出支撐主題句的論點(diǎn)。不僅要教會(huì)學(xué)生如何尋找歸納，同時(shí)還要讓學(xué)生學(xué)會(huì)印證所找到的主題句，以保證結(jié)果的正確性。期中（1）（2）兩個(gè)步驟引

12、導(dǎo)學(xué)生以實(shí)踐的方式總結(jié)有關(guān)主題句的內(nèi)容要點(diǎn)，把學(xué)生對(duì)主題句的朦朧的感性認(rèn)識(shí)上升到清晰的理論認(rèn)知水平。（3）（4）（5）訓(xùn)練學(xué)生尋讀的能力，用表格展示出文章的結(jié)構(gòu)，所填單詞提醒、引導(dǎo)學(xué)生關(guān)注文章的結(jié)構(gòu)骨架，幫助學(xué)生直觀的梳理文章，引導(dǎo)學(xué)生分析文本，從而學(xué)會(huì)尋找主題句的支撐論點(diǎn)。Step III Topic sentence to Main idea （5 mins）在得出每段的主題句并通過論點(diǎn)驗(yàn)證正確后，引導(dǎo)學(xué)生利用這些主題句總結(jié)出文章的主旨大意。意圖說明此環(huán)節(jié)為本節(jié)課的點(diǎn)睛之筆，找到主題句的最終目的是為了利用這些主題句得出文章的主旨大意，從而更好的理解說明文。Step IV Exercises

13、 （10 mins）以小組討論，交流的形式，完成課堂練習(xí)2Read the passage and finish the tasks. Robots are smart. With their computer brains, they help people work in dangerous places or do difficult jobs. Some robots do regular jobs. Bobby, the mail carrier, brings mail to a large office building in Washington D.C. He is one

14、of the 250 mail carriers in the United States. Mr. Leachim, who weighs two hundred pounds and is six feet tall, has some advantages as a teacher. One is that he does not forget details. He knows each childs name, the parents names and what each child knows and needs to know. In addition(另外), he know

15、s each childs pets and hobbies. Mr. Leachim does not make mistakes. Each child goes and tells him his or her name, then dials an identification number. His computer brain puts the childs voice and number together. He identifies the child without mistakes. Then he starts the lesson. Another advantage

16、 is that Mr. Leachim is flexible. If children need more time to do their lessons, they can move switches. In this way they can repeat Mr. Leachims lesson over and over again. When the children do a good job, he tells them something interesting about their hobbies. At the end of the lesson the childr

17、en switch Mr. Leachim off.1)The topic sentence for each paragraph.Para1 _Para2 _Para3 _2).The main idea of the passage. _3). The first paragraph of the passage tells us _.A. human beings are not as smart as robotsB. robots can help people in many different waysC. robots will take the place of man to rule the earthD. we can only use robots to do some regular jobs意圖說明通過練習(xí)，讓學(xué)生進(jìn)一步領(lǐng)會(huì)尋找主題句的方法，并練習(xí)利用主題句歸納文章主旨大意。在練習(xí)中不斷印證，反復(fù)操練所總結(jié)的方法，訓(xùn)練解題思維，強(qiáng)化記憶。同時(shí)通過小組活動(dòng)的形式，給學(xué)生創(chuàng)造機(jī)會(huì)交流方法，表達(dá)觀點(diǎn)，學(xué)會(huì)合作學(xué)習(xí)Step V Conclusion （2 mins）總結(jié)本節(jié)課所學(xué)知識(shí)和方法。尋