高中英语人教版 (2019)必修 第二册Unit 4 History and traditions教案

这是一份高中英语人教版 (2019)必修 第二册Unit 4 History and traditions教案，共7页。教案主要包含了原句再现，观察探究，归纳总结，即景活用，知识拓展等内容，欢迎下载使用。

教学内容分析
The teaching materials f this perid cntain three parts.The first part is the reading passage n Page 30 with the title f “What Can We D Abut Glbal Warming？”．It cnsists f tw letters：a request frm a student fr help n a schl prject and the reply.The letters bring students' attentin t a cmmnly held belief that individuals are pwerless t d anything abut envirnmental prblems and that it is gvernments that are in a psitin t act and have the respnsibility t act.Earth Care's letter suggests ways t save energy and therefre decrease the amunt f carbn dixide that is pured int the atmsphere.
The secnd part is Exercise 2 n Page 31，which asks the students t make a pster fr their schl that tells students varius ways they can reduce the amunt f carbn dixide in the air.
The third part is a writing task designed by the teacher，which asks students t write a shrt passage abut glbal warming.By practicing writing the passage，students can strengthen their knwledge abut glbal warming and develp their sense f envirnmental prtectin.
三维目标设计
Knwledge and skills
1．T enable the students t knw hw t prevent glbal warming.
2．T get the students t learn the fllwing useful new wrds and expressins：n behalf f，advcate，cmmitment，put up with，pllutin，electrical，s lng as，casual，and s n，mtr，cans，circumstances，micrwave，refresh，educatr，cntributin...
3．T help the students learn hw t write a pster.
4．T fster the students' ability in skimming and lking up infrmatin in reference bks and imprve the students' reading ability.
Prcess and methds
Reading fr specific infrmatin，summarizing，discussing and practicing.
Emtin，attitude and value
1．T develp students' sense f envirnmental prtectin.
2．T develp the students' sense f cperatin with thers t slve prblems.
教学重、难点
1．The understanding f the reading passage.
2．The fllwing key phrases：make a difference，put up with，s lng as
3．The fllwing key sentences：
(1)Tgether，individuals can make a difference.
(2)It is OK t leave an electrical appliance n s lng as yu are using it...
(3)Get yur parents t buy things that are ecnmical with energy...
(4)Remember—yur cntributin cunts!
4．Teaching the students hw t write a pster.
eq \(\s\up7(),\s\d5(教学过程))
Step 1 Revisin
Check the hmewrk f the last perid.
Step 2 Lead－in
Shw the students the fllwing pictures n the slide and ask students the fllwing questins：
1．Have yu ever seen the film 2012?
2．What kind f disasters have yu seen in the film?
3．What have yu learnt frm the film?
And then ask them：What causes the glbal warming？Lead them t tell the cause：gas emissin.At the same time shw the fllwing pictures：
After talking abut the causes f gas emissin，ask students the questin “What is the effect f glbal warming？”．Help them answer：natural disasters(fld，drught，hurricane，tsunami and trnad)，spread f diseases，sea level rising，decrease f species and s n.
At last，ask the questin：“What can we d abut glbal warming？” And then lead in the reading text.
Step 3 Skimming
1．Skim the first letter，and answer the questins belw：
(1)Wh is the writer?
(2)What are the tw cncerns f the letter?
Suggested answers：
(1)A student named Ouyang Guang.
(2)①His pinin that，as an individual，he can have n effect n envirnmental prblems.
②Getting sme suggestins fr what he can d abut glbal warming.
2．Read the secnd email，and answer the fllwing questin：
Des Earth Care agree with Ouyang Guang's pinin that individuals can have n effect?
Suggested answer：N，Earth Care des nt agree.
Step 4 Scanning and discussin
Ask students t scan the letters and list Earth Care's suggestins in the chart n P30，and discuss whether they can carry ut each suggestin.Give reasns fr their answers.And then ask ne r tw grups t make an ral reprt.
Step 5 Language study
Shw the students the fllwing language pints in the passage in a slide shw.
1．make a difference(P30)
【原句再现】
Tgether，individuals can make a difference.
众人拾柴火焰高。
【观察探究】
(1)The fact that I can nw rganize my wn time makes a big difference.
现在我能自己安排时间了，这对我有很大的作用。
(2)It makes n difference t me what yu say.I'm nt ging.
无论你怎么说对我都没有影响，反正我不去。
(3)It wn't make much difference whether yu g tday r tmrrw.
你今天去也好，明天去也好，关系不大。
(4)She makes n difference between her tw sns.
她对两个儿子一视同仁。
【归纳总结】
make a difference(t sb./sth.)意为“对某人/某物起作用、有影响”，difference前面可以加不同的修饰词，如n/sme/little/much等。make a difference between...表示“区别对待……”。
【即景活用】
—When shall I g there?
—It ______ whether yu g tday r tmrrw.
A．made n difference B．made n sense
C．makes n difference D．makes n sense
Suggested answers：C
2．put up with(P30)
【原句再现】
We d nt have t put up with pllutin.
我们不必忍受污染。
【观察探究】
(1)I put up with her s lng as I culd.
我尽可能地容忍她。
(2)That lady，as a husewife，has a lt t put up with.
作为一名家庭主妇，那位妇女必须要忍受许多事情。
【归纳总结】
put up with...“容忍，忍受”， 宾语可以是人或者事物。
【知识拓展】
(1)bear 和stand在疑问句和否定句中和can，be able t连用，也表示“忍受”，其宾语多为事物。
(2)live with sth.忍受某事；live with sb.和某人一起生活。
【即景活用】
He behaved badly twards his wife.As a result she culdn't ______ him and left him.
A．cme up with B．catch up with
C．put up with D．live up
Suggested answer：C
3.s lng as(P30)
【原句再现】
It is OK t leave an electrical appliance n s lng as yu are using it—if nt，turn it ff!
只要你在使用，让家用电器开着无所谓——如果不用，就请关闭！
【观察探究】
(1)Yu can brrw my bike s lng as yu remember t return it as sn as pssible.
只要你记着尽早归还就可以借用我的自行车。
(2)We can surely vercme the difficulties s lng as we are clsely united.
只要我们紧密地团结在一起，我们就一定能够克服这些困难。
【归纳总结】
s lng as 起连词作用，引导条件状语从句，可以与as lng as 互换，意思是“只要……”，前者语气较强，后者主要用于口语中。
【知识拓展】
条件状语从句的引导词还可以是if，unless，n cnditin that，suppse，suppsing，prvided(that)等。
【即景活用】
______ I am cncerned，we shuld be brave and we will reach the tp f the hill at last ______ we try ur best t climb the hill.
A．S lng as；as lng as
B．As far as；as far as
C．As far as；s lng as
D．On cnditin that；as sn as
Suggested answer：C
Step 6 Writing
1．Ask the students t make a pster fr their schl that tells students varius ways they can reduce the amunt f carbn dixide in the air.Tell students t illustrate their pster and give it a heading that will be eye－catching and will make thers want t read it.
Suggested answer：
eq \x(\a\al(Fight glbal warming,Cut dwn n energy.Cut dwn n carbn dixide.,●If nt using an electrical item，turn it ff.,●If yu suddenly feel cld，dn't turn the heat up，put n a jacket instead.,●Walk r ride a bike and save fssil fuels.,●Recycle paper，cardbard and newspapers.,●Buy prducts made frm recycled materials.,●Buy energy－saving prducts like lw energy light bulbs.,●Plant trees t absrb CO2.,●Tell yur friends abut glbal warming.,Every effrt cunts！))
2．Ask students t chse a tpic frm the list that they feel strngly abut.Make ntes n the tpic using headings similar t the table in the reading task.Use the passage as a mdel.
Writing tips：[来源:学.科.网]
Step 1：Write ut the thesis statement(pint f view)．
Step 2：Write ut the tpic sentence f the first bdy paragraph.
Step 3：Give the supprting pints and details abut the first subtpic.
Step 4：Write ut the tpic sentence f the secnd bdy paragraph.
Step 5：Give the supprting pints and details abut the secnd subtpic(mre bdy paragraphs)．
A sample versin：
The Envirnmental Effects f Fssil Fuels
There is n dubt that fssil fuels bring a lt f gd t us.But d yu knw that many f the envirnmental prblems ur cuntry faces tday result frm ur fssil fuel dependence?
The envirnment faces air pllutin，glbal warming，acid rain，and several ther very serius prblems because f ur use f fssil fuels.Over the last 150 years，burning f fssil fuels has resulted in mre than 25 percent increase in carbn dixide in ur atmsphere.
Carbn dixide is ne f the main factrs in glbal warming which is negatively affecting everyne.Fssil fuels als affect water pllutin，land pllutin，and thermal pllutin(heat pllutin)．Cal mining is ne f the causes f pllutin in the envirnment.After the mining is cmpleted，the land will remain barren.Materials ther than cal are als brught t the surface in the cal mining prcess and these are left as slid wastes.The prductin，transprtatin，and use f fssil fuels are t blame fr the effects f pllutin n the envirnment.Then what shuld we d？We shuld spare n effrt t imprve ur envirnment.Please save energy and use fewer fssil fuels in ur daily lives.
Step 7 Hmewrk
1．Master the language pints in the text.
2．Finish the writing task.
Step 8 Reflectin after teaching
________________________________________________________________________
________________________________________________________________________
eq \(\s\up7(),\s\d5(教学参考))
Glbal Warming Slutins—What Can We D?
The evidence that humans are causing glbal warming is strng，but the questin f what t d abut it remains cntrversial.Ecnmics，scilgy，and plitics are all imprtant factrs in planning fr the future.
Even if we stpped emitting greenhuse gases(GHGs)tday，the Earth wuld still warm by anther degree Fahrenheit r s.But what we d frm tday frward makes a big difference.Depending n ur chices，scientists predict that the Earth culd eventually warm by as little as 2.5 degrees r as much as 10 degrees Fahrenheit.
A cmmnly cited gal is t stabilize GHG cncentratins arund 450－550 parts per millin(ppm)，r abut twice pre－industrial levels.This is the pint at which many believe the mst damaging impacts f climate change can be avided.Current cncentratins are abut 380 ppm，which means there isn't much time t lse.Accrding t the IPCC，we'd have t reduce GHG emissins by 50% t 80% f what they're n track t be in the next century t reach this level.
Is this pssible?
Many peple and gvernments are already wrking hard t cut greenhuse gases，and everyne can help.
Researchers Stephen Pacala and Rbert Sclw at Princetn University have suggested ne apprach that they call “stabilizatin wedges”．This means reducing GHG emissins frm a variety f surces with technlgies available in the next few decades，rather than relying n an enrmus change in a single area.They suggest 7 wedges that culd each reduce emissins，and all f them tgether culd hld emissins at apprximately current levels fr the next 50 years，putting us n a ptential path t stabilize arund 500 ppm.
There are many pssible wedges，including imprvements t energy efficiency and vehicle fuel ecnmy(s less energy has t be prduced)，and increases in wind and slar pwer，hydrgen prduced frm renewable surces，bifuels(fuels prduced frm crps)，natural gas，and nuclear pwer.There is als the ptential t capture the carbn dixide emitted frm fssil fuels and stre it undergrund—a prcess called “carbn sequestratin”．
In additin t reducing the gases we emit t the atmsphere，we can als increase the amunt f gases we take ut f the atmsphere.Plants and trees absrb CO2 as they grw，“sequestering” carbn naturally.Increasing frestlands and making changes t the way we farm culd increase the amunt f carbn we're string.
Sme f these technlgies have drawbacks，and different cmmunities will make different decisins abut hw t pwer their lives，but the gd news is that there are a variety f ptins t put us n a path tward a stable climate.
Earth Care's suggestin
Can yu carry it ut？
Reasns
If yu are nt using electrical appliances，turn them ff.
Yes.
Save energy.
If yu're cld，put n mre clthes instead f turning up the heat.
Yes.
Save energy.
Mtr vehicles use a lt f energy，s walk r ride a bike if yu can.
Yes.
Save energy.
Recycle cans，bttles，plastics and newspapers and buy things made frm recycled materials.
Yes.
Save energy.
Get yur parents r friends t buy prducts that are made t save energy.
Yes.
Save energy.
Plant mre trees.
Yes.
Plants absrb carbn dixide frm the air.
Talk with yur family and friends abut glbal warming and tell them what yu've learned.
Yes.
Tgether，individuals can make a difference.