一、明確目標(biāo)1.引導(dǎo)學(xué)生熟讀課文,理清文章的論述線索,抓住作者的主要觀點;2.通過學(xué)習(xí),了解有關(guān)數(shù)學(xué)文化的一些知識;3.引導(dǎo)學(xué)生悉心體會作者對數(shù)學(xué)源頭的溯訪,感受其令人信服的推理能力和獨特的語言魅力;二、整體感知1.導(dǎo)入新課"屈指可數(shù)""彈指一揮見",手指在生活中的計數(shù)功能,直接催生了數(shù)學(xué)這門科學(xué),丹齊克的《指印》為我們揭開了這二者的關(guān)系(板書課題)。2.作者及相關(guān)背景介紹丹齊克(1884-1956),原籍立陶宛,曾在巴黎大學(xué)求學(xué)。1910年去美國,入美國國籍,先后在哥倫比亞大學(xué)、約翰·霍普金斯大學(xué)、馬里蘭大學(xué)講授數(shù)學(xué)。三、重點、難點的學(xué)習(xí)與目標(biāo)達(dá)成過程1.感知課文,明確本文的整體寫作思路。(1)學(xué)生讀課文,整理文章的結(jié)構(gòu)脈絡(luò)。(2)小組交流討論。
二、典例解析例4. 用 10 000元購買某個理財產(chǎn)品一年.(1)若以月利率0.400%的復(fù)利計息,12個月能獲得多少利息(精確到1元)?(2)若以季度復(fù)利計息,存4個季度,則當(dāng)每季度利率為多少時,按季結(jié)算的利息不少于按月結(jié)算的利息(精確到10^(-5))?分析:復(fù)利是指把前一期的利息與本金之和算作本金,再計算下一期的利息.所以若原始本金為a元,每期的利率為r ,則從第一期開始,各期的本利和a , a(1+r),a(1+r)^2…構(gòu)成等比數(shù)列.解:(1)設(shè)這筆錢存 n 個月以后的本利和組成一個數(shù)列{a_n },則{a_n }是等比數(shù)列,首項a_1=10^4 (1+0.400%),公比 q=1+0.400%,所以a_12=a_1 q^11 〖=10〗^4 (1+0.400%)^12≈10 490.7.所以,12個月后的利息為10 490.7-10^4≈491(元).解:(2)設(shè)季度利率為 r ,這筆錢存 n 個季度以后的本利和組成一個數(shù)列{b_n },則{b_n }也是一個等比數(shù)列,首項 b_1=10^4 (1+r),公比為1+r,于是 b_4=10^4 (1+r)^4.
二、典例解析例3.某公司購置了一臺價值為220萬元的設(shè)備,隨著設(shè)備在使用過程中老化,其價值會逐年減少.經(jīng)驗表明,每經(jīng)過一年其價值會減少d(d為正常數(shù))萬元.已知這臺設(shè)備的使用年限為10年,超過10年 ,它的價值將低于購進價值的5%,設(shè)備將報廢.請確定d的范圍.分析:該設(shè)備使用n年后的價值構(gòu)成數(shù)列{an},由題意可知,an=an-1-d (n≥2). 即:an-an-1=-d.所以{an}為公差為-d的等差數(shù)列.10年之內(nèi)(含10年),該設(shè)備的價值不小于(220×5%=)11萬元;10年后,該設(shè)備的價值需小于11萬元.利用{an}的通項公式列不等式求解.解:設(shè)使用n年后,這臺設(shè)備的價值為an萬元,則可得數(shù)列{an}.由已知條件,得an=an-1-d(n≥2).所以數(shù)列{an}是一個公差為-d的等差數(shù)列.因為a1=220-d,所以an=220-d+(n-1)(-d)=220-nd. 由題意,得a10≥11,a11<11. 即:{█("220-10d≥11" @"220-11d<11" )┤解得19<d≤20.9所以,d的求值范圍為19<d≤20.9
二、典例解析例10. 如圖,正方形ABCD 的邊長為5cm ,取正方形ABCD 各邊的中點E,F,G,H, 作第2個正方形 EFGH,然后再取正方形EFGH各邊的中點I,J,K,L,作第3個正方形IJKL ,依此方法一直繼續(xù)下去. (1) 求從正方形ABCD 開始,連續(xù)10個正方形的面積之和;(2) 如果這個作圖過程可以一直繼續(xù)下去,那么所有這些正方形的面積之和將趨近于多少?分析:可以利用數(shù)列表示各正方形的面積,根據(jù)條件可知,這是一個等比數(shù)列。解:設(shè)正方形的面積為a_1,后續(xù)各正方形的面積依次為a_2, a_(3, ) 〖…,a〗_n,…,則a_1=25,由于第k+1個正方形的頂點分別是第k個正方形各邊的中點,所以a_(k+1)=〖1/2 a〗_k,因此{(lán)a_n},是以25為首項,1/2為公比的等比數(shù)列.設(shè){a_n}的前項和為S_n(1)S_10=(25×[1-(1/2)^10 ] )/("1 " -1/2)=50×[1-(1/2)^10 ]=25575/512所以,前10個正方形的面積之和為25575/512cm^2.(2)當(dāng)無限增大時,無限趨近于所有正方形的面積和
課前小測1.思考辨析(1)若Sn為等差數(shù)列{an}的前n項和,則數(shù)列Snn也是等差數(shù)列.( )(2)若a1>0,d<0,則等差數(shù)列中所有正項之和最大.( )(3)在等差數(shù)列中,Sn是其前n項和,則有S2n-1=(2n-1)an.( )[答案] (1)√ (2)√ (3)√2.在項數(shù)為2n+1的等差數(shù)列中,所有奇數(shù)項的和為165,所有偶數(shù)項的和為150,則n等于( )A.9 B.10 C.11 D.12B [∵S奇S偶=n+1n,∴165150=n+1n.∴n=10.故選B項.]3.等差數(shù)列{an}中,S2=4,S4=9,則S6=________.15 [由S2,S4-S2,S6-S4成等差數(shù)列得2(S4-S2)=S2+(S6-S4)解得S6=15.]4.已知數(shù)列{an}的通項公式是an=2n-48,則Sn取得最小值時,n為________.23或24 [由an≤0即2n-48≤0得n≤24.∴所有負(fù)項的和最小,即n=23或24.]二、典例解析例8.某校新建一個報告廳,要求容納800個座位,報告廳共有20排座位,從第2排起后一排都比前一排多兩個座位. 問第1排應(yīng)安排多少個座位?分析:將第1排到第20排的座位數(shù)依次排成一列,構(gòu)成數(shù)列{an} ,設(shè)數(shù)列{an} 的前n項和為S_n。
3.法律制度走向健全關(guān)于法律制度走向健全的歷史條件,可指導(dǎo)學(xué)生閱讀教材相關(guān)段落,教師適當(dāng)補充說明,得出結(jié)論:提出法制建設(shè)方針并著手平反冤假錯案,這是恢復(fù)和加強民主法制建設(shè)的重要舉措。為全面開展法制建設(shè)準(zhǔn)備了政治基礎(chǔ)。關(guān)于法制建設(shè)方針的提出,可由教師補充材料,使學(xué)生理解加強法制建設(shè)的必要性,如:鄧小平會見意大利記者奧琳埃娜?法拉奇(1980年8月)“奧:我看不出怎樣才能避免或防止再發(fā)生諸如“文化大革命”這樣可怕的事情。”“鄧:這要從制度方面解決問題。我們過去的一些制度,實際上受了封建主義的影響,包括個人迷信、家長制或家長作風(fēng),甚至包括干部職務(wù)終身制。我們現(xiàn)在正在研究避免重復(fù)這種現(xiàn)象,準(zhǔn)備從改革制度著手。我們這個國家有幾千年封建社會的歷史,缺乏社會主義的民主和社會主義的法制?,F(xiàn)在我們要認(rèn)真建立社會主義的民主制度和社會主義法制。只有這樣,才能解決問題?!?/p>
閱讀教材后總結(jié):是萬有引力的作用把宇宙中的恒星和行星聚集在一起,組成了太陽系、銀河系和其他星系.力的相互作用遍布我們周圍的一切物體.除此之外還有電荷間的相互作用、磁體間的相互作用,我們把這種力稱為電磁相互作用.【思考與討論】質(zhì)子帶正電,但質(zhì)子(與中子一起)卻能聚集在一起構(gòu)成原子核.你能推測是什么力的作用結(jié)果嗎?攻略一:閱讀教材53頁,師生共同討論、總結(jié).攻略二:網(wǎng)絡(luò)搜索或工具書查閱“四種基本相互作用”,進一步了解概念.結(jié)論:決定物質(zhì)的結(jié)構(gòu)和變化過程的基本的相互作用.近代物理確認(rèn)各種物質(zhì)之間的基本的相互作用可歸結(jié)為四種:引力相互作用、電磁相互作用、弱相互作用和強相互作用.近代物理的觀點傾向于認(rèn)為:四種基本相互作用是統(tǒng)一的,物理學(xué)家們正在為建立大統(tǒng)一理論而努力.但至今也沒有公認(rèn)的結(jié)論,望同學(xué)們好好學(xué)習(xí),為科學(xué)事業(yè)奉獻自己的聰明和才智.
具體過程:先用懸掛法確定重心之后,在板上固定一條細(xì)線ab,讓ab穿過重心c點,再在其重心c處拴上細(xì)繩提拉,驗證薄板可以水平平衡.如圖3-1-6、3-1-7所示.歸納:物體的重心可在物體之上,也可在物體之外.結(jié)論:規(guī)則均勻的物體重心在其幾何中心;不規(guī)則不均勻的物體重心用懸掛法.例3一個被吊著的均勻的球殼,其內(nèi)部注滿了水,在球的底部有一帶閥門的細(xì)出水口.在打開閥門讓水慢慢流出的過程中,球殼與其中的水的共同重心將會()A.一直下降B.一直不變C.先下降后上升D.先上升后下降先讓學(xué)生自己回答,估計很多學(xué)生會選擇A;教師提示開始和最終重心的位置,學(xué)生很快就能得出正確答案.借機引導(dǎo)學(xué)生思考問題要全面.參考答案:在注滿水時,球殼和水的共同重心在球心,隨著水的流出,球殼的重心不變,但是水的重心下降,二者共同的重心在下降.當(dāng)水流完時,重心又回到球心,故選項C正確.
這兩章是對戰(zhàn)爭場面的描寫。寫的是戰(zhàn)車、戰(zhàn)馬、象弭、魚服以及士兵的勞累奔波、饑渴難當(dāng),通過這些具體生動的細(xì)節(jié)描寫來展現(xiàn)戰(zhàn)爭生活的圖景。而沒有寫戰(zhàn)場上的刀光劍影、廝打拼殺,但戰(zhàn)爭的殘酷已可想見。4“昔我往矣,楊柳依依。今我來思,雨雪霏霏”被視為情景交融的佳句。清人王夫之在論《詩經(jīng)·小雅·采薇》這兩句時說:“以樂景寫哀,以哀景寫樂,一倍增其哀樂?!闭?wù)勀愕目捶?。一以往昔之虛襯眼前之實,以出征之樂襯內(nèi)心之思親之悲痛;二“楊柳依依”與“雨雪霏霏”對比,突出不勝今昔之感;三大雪交加,饑渴難當(dāng),情境實悲,以哀景寫哀情。四、交流延伸1寫一首詩或一段文字表達(dá)你對“鄉(xiāng)愁”的新的體驗。在全班交流。2課后搜集更多的表現(xiàn)鄉(xiāng)情的詩歌散文作品,將你最感動的一篇拿到班上與同學(xué)分享感受。
讓學(xué)生仔細(xì)聆聽美妙的音樂,合作討論,加深理解。(1)本詩文中的“蘭芝被遣”和“蘭芝抗婚”的情節(jié),可與樂曲展開部第一階段“逼嫁抗婚”對比閱讀。文中的劉蘭芝是在封建禮教的壓迫下被遣歸及被迫“改嫁”,劉蘭芝與祝英臺一樣都進行了抗?fàn)?。樂曲中的樂器奏出了具有威脅力的封建勢力的主題,代表著封建勢力的兇暴殘酷,同時敘述了祝英臺的悲痛和不安心情,表現(xiàn)了控訴、抗?fàn)幍母星椤#?)本詩文中的“夫妻誓別”的情節(jié),可與樂曲呈示部中的結(jié)束部“長亭惜別”對比閱讀。文中劉蘭芝與焦仲卿的誓別。二人分手之際,依依不舍,“舉手長勞勞,二情同依依”。樂曲中梁祝分別時依依不舍又充滿悲傷,音調(diào)抒情徐緩。讓學(xué)生在徐緩的音樂中去感受劉蘭芝與焦仲卿生離死別的痛苦。
四、品味詩歌藝術(shù)1、詩人是如何表現(xiàn)其品質(zhì)的?運用了什么修辭手法?產(chǎn)生了怎樣的表達(dá)效果?明確:詩句“扈江離與辟芷兮,紉秋蘭以為佩”很好地體現(xiàn)了詩人光輝俊潔的人格。用“江離”“辟芷”“秋蘭”三種香草來裝飾自己,比喻自己,極其生動形象地表現(xiàn)了詩人自己美好的精神世界,使詩歌充滿了浪漫主義氣息。2、《離騷》中作者常以“香草”、“美物”來比喻自己、賢士和君王,并表達(dá)政治理想,這是《離騷》的一大藝術(shù)特色,這種方法叫做“移情法”,即不直接說出自己想說的話,而是把它寄寓于某一物上,也就是“移情于物”,這種方法在古典詩詞中廣泛運用,在政治不清明的時代,借用“移情”,可言難言之語,抒難抒之情。請找出相關(guān)的詩句,說說詩人是怎樣運用這些比喻來表達(dá)政治理想的。
教學(xué)設(shè)想:本節(jié)課的主題是“生命之綠,璞玉心靈”,用圈點批注法解讀愛綠的感情,讓學(xué)生在批注中明確“綠”的象征意義,而不只是結(jié)論的傳遞。同時借助于閱讀、感受和理解把握作者對綠的認(rèn)識是不斷升華的,由一般對生命希望之綠的喜愛,到與綠交往后被它的不畏強暴,永遠(yuǎn)向陽的精神所折服,最后在特定的時代背景下綠在作者的心目中已經(jīng)成了我們民族不屈精神的象征。讓學(xué)生評中求解,評中悟情,評中明理,評中品味。教學(xué)進程:一、導(dǎo)語上節(jié)課我們學(xué)習(xí)了朱自清的《綠》,初步了解了讀書動筆的基本方法,這節(jié)課我們繼續(xù)用圈點批注的方法來學(xué)習(xí)陸蠡的散文《囚綠記》。二、釋題師:看標(biāo)題,囚綠之“綠”在文中具體指什么?(一株常春藤)“囚”就是囚禁的意思,那題目就是記述囚禁綠色常春藤的經(jīng)過。三、圈點、把握情節(jié)作者為什么要囚綠呢?文中除了寫“囚綠”之外,還寫了哪些有關(guān)綠的意念和行動?帶著這樣的質(zhì)疑用自己喜歡的方式朗讀課文,請同學(xué)們?nèi)c出疑難字詞,或結(jié)合書下注釋,或同學(xué)合作解決,解決不了的,可提出來我們共同解決。標(biāo)注段落節(jié)次。勾畫出表現(xiàn)作者對綠意念和行動的句子。
【教學(xué)設(shè)想】一、選題設(shè)想《巴黎圣母院》是雨果的代表作,無論從思想內(nèi)容還是藝術(shù)風(fēng)格都有明顯的浪漫主義特征:奇異曲折、扣人心弦的故事情節(jié);妙趣橫生、別出心裁的奇遇巧合;強烈鮮明的美丑、善惡對比;豐富生動、珠璣迸發(fā)、富有哲理意味的語言。通過導(dǎo)讀,來消除學(xué)生對外國名著的畏難情緒,增加學(xué)生課外閱讀的興趣和信心;讓學(xué)生整體把握作品,窺一斑而識全豹,讓學(xué)生高屋建瓴,了解其旨意,以極為精確而又充滿意蘊的文字,對名著的概述及精要部分做了介紹;引導(dǎo)學(xué)生自主探究,交流合作,培養(yǎng)學(xué)生的獨立思考的學(xué)習(xí)慣,指點進行名著閱讀的門徑。作為導(dǎo)讀課,教師應(yīng)注意不可“越位”,在學(xué)生學(xué)習(xí)的過程中,教師的“導(dǎo)”固然重要,學(xué)生的“讀”更不可或缺,應(yīng)避免以“導(dǎo)讀”來代替名著閱讀。因此,《巴黎圣母院》的教學(xué)定位為基于課內(nèi),面向課外,以求達(dá)到以學(xué)帶讀,以讀促學(xué)的目的。
教學(xué)過程:一、導(dǎo)語毛澤東在《沁園春雪》俯視封建君王“惜秦皇漢武。。。只識彎弓射大雕?!钡绻麣v史上只有一個人可以與他相提并論,這個人只能是魏武帝曹操?!皾L滾長江東逝水,浪花淘盡英雄。是非成敗轉(zhuǎn)頭空,青山依舊在,幾度夕陽紅。”(《三國演義》卷首詞)在歷史的大浪淘沙中,有多少英雄能夠經(jīng)得起歷史的千淘萬漉而流芳百世呢?曹操應(yīng)該是三國時代留下了濃重一筆的人物。老師總結(jié),并啟發(fā)他們?nèi)ヂ?lián)系:我們學(xué)過他的《觀滄海》“東臨碣石,以觀滄?!边€有《龜雖壽》“神龜雖壽,猷有竟時。老驥伏櫪,志在千里;烈士暮年,壯心不已?!薄肚嗝分鬄⒄撚⑿邸分性退娺^,《三國演義》電視劇播出后,大家和他也就頻頻見面了。《三國演義》第48回“宴長江曹操賦詩”中,赤壁之戰(zhàn)前夕,曹操和眾部將一起狂飲,他四顧空闊,心中大喜,與諸將講述自己希望收服江南的雄心壯志。
This lesson aims at making a poster about protecting wildlife after reading some posters. During reading students are guided to understand the content and try to summarize the posters with one sentence. Then students are guided to try to make a poster about protecting wildlife.1. Read the two posters and try to understand the summary sentences.2. Look at the two posters and try to understand what emotions they express.3. Try to summarize the features of posters4. Try to make a poster about wildlife.1. Look at the two posters and try to understand what emotions they express.2. Try to summarize the features of posters3. Try to make a poster about wildlife.Step 1 Lead inLook at the the posters on the textbook and ask:Which emotions do the posters communicate ?Step 2 Read the poster and answer the questions.1. What do you think of the animals in the poster on the left ?I think it is frightening and ugly.2. Why do we should protect the ugly animals ?All species--the good, the bad, and the ugly-- should be treated equally.The world needs all kinds--without variety, our planet cannot survive.3. Why are billions of trees being cut down every year ?To make paper for humans.4. What result will be lead to after the trees are cut down ?A lost of animal homes are being destroyed./The habitat of wildlife is being destroyed.Step 3 Find the feature of posters1. What does each poster use to stir up emotions ?On the left, it makes us a little frightened and it looks a little ugly, but it can activate our curiosity--What is it? And What is wrong with it?On the right, it makes us feel a little sad and want to protect them.
2.表示現(xiàn)階段正在進行的被動動作(該動作在說話的瞬間未必正在進行)。Many interesting experiments are being carried out these days.(說話時,并不一定正在進行)3.表示一種經(jīng)常性的被動行為,常和always,constantly 等表示頻度的副詞連用,這種用法常常帶有贊揚或厭惡的感情色彩。He is always being praised by the leader.4.表示按計劃或安排主語將要承受謂語動詞所表示的動作(僅限于少數(shù)及物動詞)。A party is being held tonight.Step 4 Special cases1.像take care of, look after, talk about, think of等動詞與介詞構(gòu)成的短語用于現(xiàn)在進行時的被動語態(tài)時, 其中的介詞不可省略。The ways to stop illegally hunting are being talked about. 2.可與部分情態(tài)動詞連用,表示對正在發(fā)生的事情的推測。She may be being punished by her mother.3.有時可表示按計劃或安排將要進行的一個被動動作。A celebration is being held this weekend for his success.4.某些表示“狀態(tài)、心理活動、存在”等的動詞,如have,want,need,love,一般不用現(xiàn)在進行時的被動語態(tài),而常用一般現(xiàn)在時的被動語態(tài)。With the population increasing,more land is needed.5.“be+under/in+n.”可表示現(xiàn)在進行時的被動意義。My computer is under repair.=My computer is being repaired.
The listening and speaking part aims at how to protect and help endangered animals by listening, speaking and talking about the facts and reasons. This lesson analyzes the decreasing clause of Tibetan antelope population and the measures of protecting Tibetan antelopes. So students can be guided to learn to analyse the title and use different reading skills or strategies, like scanning, skimming and careful reading.1. Read quickly to get the main ideas and the purpose of going to Tibetan; read carefully to understand what the author see and think.2. Understand the sentences of the present continuous passive voice such as “Much is being done to protect wildlife.” and the inverted sentence “Only when we learn to exist in harmony with nature can we stop being a threat to wildlife and to our planet.”3. Enhance the awareness of protecting wildlife.4. Cultivate the reading methods according to different materials.1. Read quickly to get the main ideas and the purpose of going to Tibetan; read carefully to understand what the author see and think.2. Understand the sentences of the present continuous passive voice such as “Much is being done to protect wildlife.” and the inverted sentence “Only when we learn to exist in harmony with nature can we stop being a threat to wildlife and to our planet.”3. Cultivate the reading methods according to different materials.Step 1 Leading-inWatch a video about elephants and whales and then ask:Why are they endangered ? They are killed/hunted
Listening and Speaking introduces the topic of “how to save endangered wildlife and help wildlife in their neighborhood.” Due to the continuous deterioration of the living environment, a large number of wild animals are always facing the threat of endangered or extinction. Listening and speaking period enables students to understand the fact and reason why wild species are disappearing from the earth at an amazing speed, and realize that human beings ought to enhance the awareness of protecting wild species as soon as possible.Listening and Talking introduces the theme of " how to help wildlife in Ss’ neighborhood.". Now there are many volunteers who spontaneously protect wild animals, carry out various activities according to local conditions, and contribute their own strength to local animal protection with practical actions. Middle school students are also enthusiastic participants. They organize activities in their spare time, and take this opportunity to make friends, broaden their horizons, cultivate team spirit and communication skills. This section describes a bird watching activity organized by several middle school students of Bird watching Club. It aims to stimulate students' interest, improve their understanding of bird watching activities, and use the language structure of “being used for; in order to, so as to, to, so that, in order that ” to express the purpose for communication and discussion.1. Guide students to understand the content of listening texts in terms of using visuals to predict content.2. Cultivate students' ability to guess the meaning of words in listening; discuss with their peers how to save endangered wildlife and help wildlife in their neighborhood.3. Instruct students to use functional sentences of the dialogue such as “I am concerned about…” “what do you know about the endangered animals in…" and so on to talk about one of the endangered animals.
This lesson is about wildlife protection. The listening and speaking is about “How to protect endangered wildlife ?” Faced with the facts and numbers of wildlife loss, people begin to detect the reasons, then people such as the celebrities (Prince William and Yao Ming) are calling on to protect them. So students are guided to enhance the awareness of protecting wildlife and try to take part in some volunteer activities of protecting wildlife.1. Predict the content by using visuals. 2. Learn to use the sentences such as “I’m concerned about.... But now they are in danger. I want to know the reasons/why./ What can we do to protect them ?3. Learn from the stars like Prince William and Yao Ming and enhance the awareness of protecting wildlife.4. Guide students to try to put forward the solutions to the problems of wildlife protection and then discuss them with partners and present the results of discussion.5. Master the pronunciation of stressed syllables.1. Learn from the stars like Prince William and Yao Ming and enhance the awareness of protecting wildlife.2. Guide students to try to put forward the solutions to the problems of wildlife protection and then discuss them with partners and present the results of discussion.3. Learn to use the sentences such as “I’m concerned about.... But now they are in danger. I want to know the reasons/why./ What can we do to protect them ?4. Master the pronunciation of stressed syllables.Part A Listening and Speaking--- How to save endangered wildlifeStep 1 Lead in1. Point at the pictures on P14 and ask Q1: What message do these posters share?
The theme of this unit is human and nature, focusing on the theme of wildlife protection. Nature is a complex ecosystem, in which there are delicate balance between animals and plants. Because of the role of the food chain, the extinction of one species will produce influence, causing a series of chain reaction. Large scale extinction of species will have a serious and even irreversible impact on the ecosystem, resulting in immeasurable losses. Therefore, it is of great significance to protect wild species. To protect wild species is to protect human beings themselves. The motto of this unit is "when the buying stops, the killing can too,” which is a public service advertising slogan to protect wildlife. It tells people that every rhinoceros horn, every fur, every bowl of shark fin soup, every Ivory product, and every tiger bone product, etc. consumed by human beings, are innocent wild animals slaughtered behind them. The mission of wild aid is to ban illegal trade in endangered wildlife and mitigate climate change. It aims to educate the public to reduce the consumption demand for endangered wildlife products through public publicity and improve the awareness of environmental protection.1. Improve the awareness of wildlife protection by acquiring the knowledge of wildlife protection.2. Focus on environmental protection and protection of all lives.3. Analysis of the living environment of wild animals with appropriate thinking mode.4. Skillfully use the vocabulary and grammar knowledge of this unit to cultivate self-study ability according to the unit content5. Develop cooperative learning ability through discussion and other ways1. Enable the Ss to talk about the current situation of wild animals.2. Guide the Ss to summarize the main idea of each paragraph as well as the main idea of the text.