英语外研版 (2019)Unit 5 A delicate world教案
展开本课时包括 Starting ut和 Understanding ideas两部分。
Starting ut是导人部分,包括观看视频回答问题和观察图片回答问题两个环节。通过问答部分将学生的思路引人生态系统遭到破坏的话题,紧扣单元主题。通过对比1990年到2010年这20年间位于中亚的咸海在卫星地图下的变化,让学生观察到咸海在短短的20年里,由原来的水源丰富变成几近干涸的状况。
Understanding ideas部分讲述了麦夸里岛由于外来物种的入侵,岛上的生态系统遭到破坏,人们又想方设法维持生态平衡。后来,生态系统逐渐恢复。警醒人们维持生态平衡的重要性。
课时目标:
1.认知并灵活运用本课时的重点单词 halfway dramatically、heritage、inhabitant、penguin、habitat、rat、subsequently、appetite、multiply、vegetatin、ersin、chas、cnservatin、ⅵrus、decrease、trap、departure、Immunity、explde、cllapse、substantial、incident、interventin、we、eclgy和短语 take place、in harmny with、take ver、develp an appetite fr、sil ersin、the number f、in turn、lead t、die ut、ut f cntrl、cme up with、remve…frm…、in cnsequence、be used t d sth、turn ut、nce again、nce and fr all,participate in、we…t…、n the rad t、save frm、infrm sb f sth、entertain sb with sth、by accident、apply…t…等。
2.通过速读精读等方式,引导学生由浅入深,逐层推进,加深对文章的理解,并掌握不同的阅读技巧和方法。通过对所设置题目的解答,让学生学会根据关键词提取重要信息,理清文章线索,并学会深层次分析问题,进行语言加工,提高归纳概括、推理判断的能力。
3.通过阅读文章,了解保持生态平衡的重要性,每个人都要怀有环保理念,保护环境,保护大自然。
重点难点:
重点:
学习、掌握本课的重点单词 halfway、dramatically、heritage、inhabitant、habitat、appetite、multiply、vegetatin、ersin、cnservatin、decrease、trap、departure、explde、substantial、incident、interventin、we和短语 in harmny with、take ver、develp an appetite fr、die ut、ut f cntrl、cme up with、remve…frm…In cnsequence、be used t d sth、turn ut、participate in、we…t…、infrm sb f sth、entertain sb with sth、by accident、apply…t…及句型,并能在具体语境中选用合适的形式进行灵活运用。
难点:
1.通过解决阅读阶段所设置的题目,学会分析问题、解决问题,理清文章脉络,提高阅读水平
2.通过阅读文章,了解外来物种对本地生态系统的破坏,明白引进外来物种要慎重。
教学准备:
教师准备:
1.准备好该部分内容的视频材料、PPT以及音频素材。
2.设计好阅读理解题目,利用不同方式拓展语言点激发学生学习的兴趣。
学生准备:
1.在网上搜索了解麦夸里岛从喧嚣到被保护的变迁,了解保护麦夸里岛以及整个生态系统的重要性。
2.思考为了维持生态平衡,我们应该怎样做,我们应该怎样过绿色、环保的生活。
3.预习 Starting ut和 Understanding ideas两部分的内容,通过查字典等方式提前解决词汇问题。
教学过程:
Step I Starting ut
1.Watch the vide and answer the questins
·Are humans part f Earths ecsystems? Why?
·In what ways can humans affect ecsystems?
2. Lk at the satellite images and answer the questins.
·What is happening t the area accrding t the satellite images?
·What d yu think a later satellite image wuld shw?
·What d yu think caused these changes?
【设计意图】通过这两个活动,将学生们迅速带入维持生态平衡、保护自然的话题当中,为后面的学习热身,做好准备。
Step II Reading
1. Pre-reading.
Lk at the picture belw and answer the questins.
·What animals can yu see in the picture?
·What kind f changes wuld take place if cats, rats and rabbits were intrduced t an envirnment like this?
2. Fast reading.
(1) Read the passage and find ut what happened Macquarie Island.
(2) Match the main ideas with the paragraphs.
Para. 1: _____________________________________
Para. 2: _____________________________________
Para.3: __________________________________________
Para.4: __________________________________________
(3) Read the passage quickly and answer the fllwing questins.
【设计意图】通过图片将学生带入到小丑的话题,引导学生积极、认真地准备,与全班分享自已对小丑的认知,对学生主动投入课堂活动具有积极的意义。另外,也营造了乐分享、乐沟通的课堂氛围。
【设计意图】通过快速阅读回答问题,引导学生做这类题要抓住关键信息,确定具体的段落,然后再找到问题的答案,即原文定位法。此题的设置对学生阅读理解能力、概括归纳能力都是一种很好的锻炼,有助于提高学生分析问题、解决问题的能力。
3.Careful reading.
(1)Language pints.
Master the wrds and phrases:
halfway,dramatically,heritage,inhabitant,habitat,appetite,multiply,vegetatin,ersin,cnservatin,decrease,trap,departure,explde,substantial,incident,interventin,we,in harmny with,take ver,develp an appetite fr,die ut,ut f cntrl,cme up with remve…frm…,in cnsequence,be used t d sth,turn ut,participate in,,infrm sb f sth,entertain sb with sth,by accident,apply…t…
【备注】词汇知识点讲解详见第二教案“新知探究”。
(2)Read the passage again and retell it.
【设计意图】通过设置该题,进一步归纳、概括文章,理清文章脉络,有助于学生更好地加深对文章的理解,同时,在读懂语篇的基础上,将英语词汇、句法知识融合在一起,更科学地反映学生的口头表达能力和英语综合能力。
4. pst-reading.
(1) D Activity 3 n Page 52.
Chse the authrs purpse in writing the passage and give yur reasns.
①T analyse hw Macquarie Island was saved frm destructin
②T infrm readers f the chas caused n Macquarie Island by humans
③T entertain readers with a funny stry abut what happened n Macquarie Island.
④T suggest ways in which an ecsystem can be prtected
【设计意图】该活动是写作意图题。此类题型要求学生根据文章的论述,推测作者的写作意图及应用某种写作手法的目的。作者一般不直接陈述自己的意图,而是通过文章所提供的客观事实使读者信服某种想法或观点。这类题型要求考生不仅能理解文章的内容,还要具备对作者所阐述的问题及使用的写作手法进行分析和总结的能力。
(2) D Activity 4 n Page 52.
① Organise infrmatin frm the passage and cmplete the flw chart.
②Talk abut hw human interference led t such severe cnsequences fr Macquarie Island.
【设计意图】该活动以思维导图的形式,将麦夸里岛的生态平衡遭到破坏的原因和过程清晰地呈现出来,有助于学生理清文章主线、获取关键信息,引导学生抓住题目中的关键词,回扣原文,通过原文定位法,找到问题的答案。
Step Ⅲ Summing up
1.总结本节课的重点单词 halfway、dramatically heritage、inhabitant、habitat、appetite、multiply、vegetatin ersin、cnservatin、decrease、trap、departure、explde、substantial、incident、Interventin、we和短语 in harmny with、take ver、develp an appetite fr、die ut、ut f cntrl、cme up with、remve…frm…、In cnsequence、be used t d sth、turn ut、participate in、we…t…、infrm sb f sth、entertain sb with sth、by accident、apply…t…及句型,采用表格、思维导图等形式使学生更清晰地了解它们的用法,形成知识脉络。
2.让学生简短介绍麦夸里岛生态平衡遭到破坏和恢复的过程,进一步锻炼学生概括、归纳的能力。
3.通过阅读关于麦夸里岛的生态系统的内容,引导学生理解随着经济的发展、科学的进步及生产力的提高,对资源的过度利用,使人类付出了巨大的环境代价。大气污染、水源污染、水土流失、各种资源的逐渐贫乏等都对人类提出了各种警示,让人类认识到生态平衡的重要性,认识到保护环境对生态系统的重要性。因此,近年来,随着社会文明的发展,人们越来越重视环境保护,也越来越注重
维护生态系统的平衡。
Step IV Hmewrk
1. Sum up what we learnt in class and take ntes.
2. Preview the next perid.
板书设计
Suggested answers:
·Yes. Humans are part f Earths ecsystems Because all the living things live in ecsystems and peple are living things.
·Humans can affect ecsystems in psitive and negative ways. Fr example, t have a psitive influence n ecsystems, peple can plant trees, feed and prtect animals, recycle things, etc. Hwever defrestatin, air and water pllutin and excessive waste affect ecsystems in a negative way.
Suggested answers:
Aral Sea is becming smaller and smaller/shrinking
·(略)
Suggested answer:
·(略)
·They wuld hunt the birds and eat the native vegetatin, thus upsetting the lcal eclgical balance.
Suggested answer:
Nn-native species intrduced t Macquarie Island attacked native birds, and led t a substantial reductin f bird ppulatin and even the extinctin f parakeets. In additin, nn-native species ate and devastated the native vegetatin. All f this played a part in upsetting the natural harmny f the island. But nw the islands eclgy is n the rad t recvery with human effrts.
A. T prtect native animals, invading animals species had t be remved.
B. Fr bilgical chain, the island’s recent stry is really a tragic stry.
C. Fr sme reasns, there were n cats in 2000.
D. Macquarie Island is a UNESCO Wrld heritage Site.
E. Because f bilgical chain, parakeets, the native t the island died ut.
F. The rat, muse and rabbit prblem shuld be slved nce and fr all.
Suggested answers:
Para. 1-D; Para 2-B; Para 3-E; Para 4-C; Para, 5-F: Para. 6-A
1.Why is Macquarie Island a UNESCO Wrld Heritage Site?
Because it is halfway between Australia and Antarctica.
B. Because it is in the Suth-west Pacific Ocean.
C. Because many visitrs like t g there.
D. Because there are many precius native inhabitants.
2.What is the purpse f the island s intrductin f cat?
T kill rats and mice.
B T take ver the island.
C. T be fd fr the birds.
D. T bring the island clurful.
3.What was the cause f the parakeets, dying ut?
A. Their number was t large.
B. The rabbits liked t eat them.
C. T many cats hunted the parakeets.
D. The parakeets were eaten up by visitrs.
4.When did the island have n cats?
A. in the 1970s.
B. In the 1980s.
C. in2000.
D. In20066.
5.Where des this passage prbably cme frm?
A. ATV interview.
B. a bilgic reprt.
C. a fd advertisement.
D. a bk review.
Suggested answers:
1~5 DACCB
Suggested answers:
·①
·Reasns:(略)
Suggested answers:
ACTION(S)
PURPOSE(S)
RESULT(S)
Humans arrived n
Macquarie Island.
T live there.
Rats and mice were brught there by accident, and they tk ver the island, eating the birds’ eggs and attacking baby birds.
Cats were
brught t
the island.
T cntrl the
rats and mice
The cats develped an appetite fr the birds.
Rabbits were
intrduced t
the island.
T prvide
fd fr humans.
Rabbits multiplied and caused sil ersin, and the explding rabbit ppulatin prvided plentiful fd fr the cats. This led t mre cats hunting the birds. As a result, parakeets died ut in 1891.
A virus was
released nt
the island.
T remve all the rabbits frm the
Island
Substantial reductin f rabbit ppulatin led tcats killing mre native birds.
Traps and dgs were used.
T catch the cats.
The departure f the cats resulted in an increasing ppulatin f rats and mice. And the rabbit ppulatin explded nce again.
Pisn and dgs were used.
T remve all the remaining invadings pecies.
The island was pest-free and Its eclgy is n the rad t recvery.
Unit 51 A delicate wrld
Perid I Starting ut & Understanding ideas
I. Starting ut
1. Watch the vide and answer the questins.
2. Lk at the satellite images and answer the questins.
Ⅱ. Reading
1.Pre-reading.
Lk at the picture belw and answer the questins.
2. Fast reading
(1) Read the passage and find ut what happened t Macquarie Island.
(2) Match the main ideas with the paragraphs.
(3) Read the passage quickly and answer the fllwing questins.
3. Careful reading.
(1) Language pints.
Master the wrds and phrases:
halfway, dramatically, heritage, inhabitant, habitat appetite, multiply, vegetatin, ersin, cnservatin, decrease, trap, departure, explde, substantial, incident, interventin, we, in harmny with, take ver, develp an appetite fr, die ut, ut f cntrl, cme up with, remve…frm…, in cnsequence, be used t d sth, turn ut, participate in, we... t …, infrm sb f sth, entertain sb with sth, by accident apply… t…
(2) Read the passage again and retell it.
4. Pst-reading.
(1) D Activity 3 n Page 52.
(2) D Activity4 n Page 52.
Ⅲ. Summing up
Ⅳ. Hmewrk
选择性必修 第二册Unit 3 Times change!教学设计: 这是一份选择性必修 第二册<a href="/yy/tb_c4009235_t8/?tag_id=27" target="_blank">Unit 3 Times change!教学设计</a>,共9页。教案主要包含了设计意图等内容,欢迎下载使用。
高中英语外研版 (2019)选择性必修 第三册Unit 5 Learning from nature教案: 这是一份高中英语外研版 (2019)选择性必修 第三册<a href="/yy/tb_c4009244_t8/?tag_id=27" target="_blank">Unit 5 Learning from nature教案</a>,共16页。
外研版 (2019)选择性必修 第二册Unit 1 Growing up教学设计: 这是一份外研版 (2019)选择性必修 第二册<a href="/yy/tb_c4009233_t8/?tag_id=27" target="_blank">Unit 1 Growing up教学设计</a>,共9页。教案主要包含了设计意图等内容,欢迎下载使用。