初中英語(yǔ)外研版八年級(jí)下冊(cè)《Unit 2 We have not found life on any other planets yet.》公開課教案-八年級(jí)英語(yǔ)教案

外研版八年級(jí)下M3Unit

2

We

haven’t

found

life

on

other

planets

yet.教材分析本單元為讀寫課，文章內(nèi)容為介紹太空的基本知識(shí)和人類對(duì)太空所付出的努力，同時(shí)也提出了困惑：地球之外是否還存在其他生命？本課文能夠幫助學(xué)生充分理解現(xiàn)在完成時(shí)的語(yǔ)境。教師在引導(dǎo)學(xué)生形成對(duì)課文中現(xiàn)在完成時(shí)語(yǔ)句的深刻印象時(shí)，還應(yīng)強(qiáng)化課文作為特定語(yǔ)篇的圖式功能。課時(shí)教學(xué)目標(biāo)To

readandfindoutinformationfromsimpletextsandchoosethebesttitleTounderstandthedifferencesbetweenthePresentPerfectandthePresentSimpleTo

writeapassagetodescribeapicture

教學(xué)重點(diǎn)與難點(diǎn)1．教學(xué)重點(diǎn)（1）重點(diǎn)詞匯:group,light,impossible,take,out,communicate,nvironment（2）重點(diǎn)句型：However,wehavenotfoundlifeonanyotherplanetsyet.Scientistshavealsodiscoveredmanyothergalaxiesintheuniverse.Noneofthemhasanenvironmentlikethatoftheearth.Whyhasnoonecommunicatedwithus?2．教學(xué)難點(diǎn)（1）在語(yǔ)境中理解現(xiàn)在完成時(shí)和一般過去時(shí)的區(qū)別教學(xué)輔助Pptmp3教學(xué)方法task-basedapproach,situationalteaching引導(dǎo)法教學(xué)內(nèi)容教學(xué)活動(dòng)設(shè)計(jì)意圖教師活動(dòng)學(xué)生活動(dòng)Step

1

Revision&lead-inPlayagameHandoutsomecards(eachcardhasawordconnectedtotheplanetsinthesolarsystem)then

ask

them

to

put

the

Sunandtheeight

planetsat

the

right

place.Thebestgroupwithgetsomeprize.Ask

students

to

work

in

groups

to

discussthe

question:Have

we

found

life

on

other

seven

planets

yet?

If

not,

why?Thenleadtothislesson:Unit

2

We

haven’t

found

life

on

other

planets

yet.通過動(dòng)手操作的游戲活動(dòng)，將較難掌握的天體名稱以生動(dòng)有趣的形式呈現(xiàn)給學(xué)生，可以活躍課堂氣氛，提高學(xué)生的興趣，同時(shí)檢查了學(xué)生的預(yù)習(xí)情況。通過問題的討論，為后面的文章學(xué)習(xí)做好了相關(guān)知識(shí)的儲(chǔ)備，使得學(xué)生學(xué)起來更輕松愉快。Step2:Pre-reading1.VocabularyLookatsomepicturesandreviewthenewvocabulary2.Free-talkWatchavideoaboutChang’eIIIlandingonthemoon,thenaskSsworkingroupstotalkaboutChinesespaceships.(Activity1)借助圖片學(xué)習(xí)新詞匯，形象直觀，避免了枯燥無味。為學(xué)生理解閱讀材料做好詞匯鋪墊。觀看視頻并討論，減少閱讀障礙。Step3:

While-reading

(Activities

2

&

3)

Skimming

(Activity

2)Ss

skimthe

passageand

try

tofind

the

besttitle

of

the

passage.

(First,

Ss

choose

the

title

individually,

then

discuss

it

with

their

partnersand

try

to

explain

the

reasons.)

2.

Scanning(Activity

3)Ss

scanthe

passageand

try

tocheckthetruesentencesinActivity

3.AskSstocorrectorgivereasonwhyitisfalse.Detailed

reading

ReadPara.1andanswer:1).Howlonghastherebeenlifeontheearth?2).Havewefoundlifeonanyotherplanetsyet?ReadPara.2andanswer:1).Howmanyplanetsgoaroundthesun?2).Whatiscalledthesolarsystem?Whatisit?3).Whydon’tscientiststhinkthey’llfindlifeontheotherplanets?Whichistrue?A:Sevenplanetsgoaroundthesun.B:thereareonlystarsinthegalaxy.C.Thesolarsystemislargerthanthegalaxy.D:theEnvironment(環(huán)境)oftheearthisdifferentfromthatotherplanetinthesolarsystem.ReadPara.3andanswer:1).Whathavescientistsdiscovered?2).Whyisitimpossibletoimaginehowlargetheuniverseis?Whatarethesunanditsplanetscalled?Thesolarsystem.Isthereonlyonegalaxyintheuniverse?No,therearemanygalaxiesintheuniverse.Howlargeistheuniverse?It’simpossibletoimagineReadPara.4andanswer:1).WhyhavescientistssentspaceshipstotheplanetMars?2).HasanyspaceshiptravelledtoreachotherstarsinourGalaxy?SpaceshipshavetravelledtotheplanetMarsand_outsidethesolarsystem.ButnotreachedotherstarsinourGalaxyyet,becauseitistoo__far訓(xùn)練學(xué)生對(duì)文章的整體理解能力。要求學(xué)生說明選擇的依據(jù)，目的是幫助學(xué)生分析細(xì)節(jié)與整體的差別，關(guān)注學(xué)生閱讀策略的培養(yǎng)。訓(xùn)練學(xué)生對(duì)文章細(xì)節(jié)的理解與判斷，要求學(xué)生能獨(dú)立思考，完成練習(xí)，總結(jié)閱讀技巧與規(guī)律。分段進(jìn)行細(xì)節(jié)閱讀，有利于學(xué)生對(duì)文章的透徹理解，在解決問題的同時(shí)，解決了語(yǔ)言點(diǎn)上的困惑，在具體語(yǔ)境中也更好地理解現(xiàn)在完成時(shí)和一般過去時(shí)的用法區(qū)別。設(shè)計(jì)這些問題是為了幫助學(xué)生提高學(xué)習(xí)的主動(dòng)性，學(xué)會(huì)自主學(xué)習(xí)的方法，逐漸形成比較完善的閱讀學(xué)習(xí)策略，以搶答積分的形式可以提高學(xué)生的上進(jìn)心和競(jìng)爭(zhēng)意識(shí)。

Step4:Post-reading（Activity4）WatchandlistenCompletethepassageinActivity4.3.Retellcompetition---MemorychallengeFirstreadtheparagraph,thentrytoretellthepassagebylookingattheconcerningpicturesandsomehintsconnectedtokeywordsandphrases.Thewinnerwillgetaprize.通過完成Activity4的短文填空，不僅考察了學(xué)生對(duì)詞匯的掌握，還形成了對(duì)文章主旨大意的把握。以比賽的形式來復(fù)述課文，檢查學(xué)生對(duì)文章的理解和運(yùn)用，并增強(qiáng)競(jìng)爭(zhēng)意識(shí)。Step5:Writing

(Activities

5

&

6)Show

students

a

cartoon

picture,

letSsanswer

the

questions

inActivity5first,

andthen

use

the

answers

to

describethepictureorally.

先進(jìn)行句子寫作為后面的語(yǔ)篇寫作作好準(zhǔn)備，這種遞進(jìn)的過程式寫作方式可以降低寫作的難度，增強(qiáng)學(xué)生的寫作信心。和強(qiáng)化。Step

6

Summarizemillionsofyearsonanyotherplanetsgoaroundthesunnoneofthembecalledthesolarsystemasmallpartofbillionsofstarsintheuniversemanyothergalaxiesfarawayhave/hastofarenoughsomanycommunicatewithsb.學(xué)生總結(jié)，老師點(diǎn)撥，培養(yǎng)學(xué)生歸納總結(jié)的能力。家庭作業(yè)：1.Readthepassage2.WriteapassagetofinishA6板書設(shè)計(jì)：

M3U2Wehav