初中英语外研版八年级下册《Unit 2 We have not found life on any other planets yet.》公开课教案-八年级英语教案

外研版八年级下M3Unit

2

We

haven’t

found

life

on

other

planets

yet.教材分析本单元为读写课，文章内容为介绍太空的基本知识和人类对太空所付出的努力，同时也提出了困惑：地球之外是否还存在其他生命？本课文能够帮助学生充分理解现在完成时的语境。教师在引导学生形成对课文中现在完成时语句的深刻印象时，还应强化课文作为特定语篇的图式功能。课时教学目标To

readandfindoutinformationfromsimpletextsandchoosethebesttitleTounderstandthedifferencesbetweenthePresentPerfectandthePresentSimpleTo

writeapassagetodescribeapicture

教学重点与难点1．教学重点（1）重点词汇:group,light,impossible,take,out,communicate,nvironment（2）重点句型：However,wehavenotfoundlifeonanyotherplanetsyet.Scientistshavealsodiscoveredmanyothergalaxiesintheuniverse.Noneofthemhasanenvironmentlikethatoftheearth.Whyhasnoonecommunicatedwithus?2．教学难点（1）在语境中理解现在完成时和一般过去时的区别教学辅助Pptmp3教学方法task-basedapproach,situationalteaching引导法教学内容教学活动设计意图教师活动学生活动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.通过动手操作的游戏活动，将较难掌握的天体名称以生动有趣的形式呈现给学生，可以活跃课堂气氛，提高学生的兴趣，同时检查了学生的预习情况。通过问题的讨论，为后面的文章学习做好了相关知识的储备，使得学生学起来更轻松愉快。Step2:Pre-reading1.VocabularyLookatsomepicturesandreviewthenewvocabulary2.Free-talkWatchavideoaboutChang’eIIIlandingonthemoon,thenaskSsworkingroupstotalkaboutChinesespaceships.(Activity1)借助图片学习新词汇，形象直观，避免了枯燥无味。为学生理解阅读材料做好词汇铺垫。观看视频并讨论，减少阅读障碍。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(环境)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训练学生对文章的整体理解能力。要求学生说明选择的依据，目的是帮助学生分析细节与整体的差别，关注学生阅读策略的培养。训练学生对文章细节的理解与判断，要求学生能独立思考，完成练习，总结阅读技巧与规律。分段进行细节阅读，有利于学生对文章的透彻理解，在解决问题的同时，解决了语言点上的困惑，在具体语境中也更好地理解现在完成时和一般过去时的用法区别。设计这些问题是为了帮助学生提高学习的主动性，学会自主学习的方法，逐渐形成比较完善的阅读学习策略，以抢答积分的形式可以提高学生的上进心和竞争意识。

Step4:Post-reading（Activity4）WatchandlistenCompletethepassageinActivity4.3.Retellcompetition---MemorychallengeFirstreadtheparagraph,thentrytoretellthepassagebylookingattheconcerningpicturesandsomehintsconnectedtokeywordsandphrases.Thewinnerwillgetaprize.通过完成Activity4的短文填空，不仅考察了学生对词汇的掌握，还形成了对文章主旨大意的把握。以比赛的形式来复述课文，检查学生对文章的理解和运用，并增强竞争意识。Step5:Writing

(Activities

5

&

6)Show

students

a

cartoon

picture,

letSsanswer

the

questions

inActivity5first,

andthen

use

the

answers

to

describethepictureorally.

先进行句子写作为后面的语篇写作作好准备，这种递进的过程式写作方式可以降低写作的难度，增强学生的写作信心。和强化。Step

6

Summarizemillionsofyearsonanyotherplanetsgoaroundthesunnoneofthembecalledthesolarsystemasmallpartofbillionsofstarsintheuniversemanyothergalaxiesfarawayhave/hastofarenoughsomanycommunicatewithsb.学生总结，老师点拨，培养学生归纳总结的能力。家庭作业：1.Readthepassage2.WriteapassagetofinishA6板书设计：

M3U2Wehav