
通過寫文章梗概,培養(yǎng)學(xué)生綜合運(yùn)用語言的能力,學(xué)習(xí)用恰當(dāng)?shù)挠⒄Z描述科學(xué)家的故事。這是本課的教學(xué)難點(diǎn)。教師可以使用完形填空的方式來幫助學(xué)生整理語篇,從而來降低難度。本課的教學(xué)重點(diǎn)的突破方法是:在閱讀前,讓學(xué)生初步了解得出科學(xué)觀點(diǎn)所需要的基本程序,從而輕松而自然地導(dǎo)入文章的閱讀;在閱讀過程中,由易到難設(shè)計(jì)快速閱讀和精讀的問題,層層推進(jìn)各種閱讀活動(dòng),讓學(xué)生對(duì)閱讀內(nèi)容從整體感知到細(xì)節(jié)理解,最后深層讀懂整篇文章,同時(shí)加強(qiáng)閱讀策略的指導(dǎo),讓每個(gè)學(xué)生都主動(dòng)參與課堂教學(xué)活動(dòng),最終達(dá)到提高閱讀能力的目的。Step 4 Post-readingGroup Activities四人小組共同合作,在老師的適當(dāng)指導(dǎo)下,就以下2個(gè)問題展開討論,讓學(xué)生就所知、所學(xué)、所感和所想融入話題,然后抽若干同學(xué)代表作小組發(fā)言。1. What do you think about John Snow, and what should we learn from him?2. Cholera was 19th century disease, which two diseases are similar to cholera today? Why?

今天我們來介紹一下必修五第四單元的授課方式。這個(gè)單元的題目是Making the news。應(yīng)該是學(xué)生比較感興趣的話題,學(xué)生往往對(duì)新聞工作充滿好奇,所以我們可以利用這個(gè)機(jī)會(huì)多設(shè)計(jì)一些師生互動(dòng)和學(xué)生互動(dòng),來激發(fā)起學(xué)習(xí)的積極性,提高學(xué)習(xí)效率。同時(shí)我們可以利用這個(gè)單元不僅幫助學(xué)生掌握語言知識(shí),培養(yǎng)語言能力,同時(shí)讓其了解新聞工作的重要性,培養(yǎng)起社會(huì)智能感。這個(gè)單元分為六個(gè)課時(shí),它的教學(xué)目標(biāo)是這樣的:語言目標(biāo)是掌握詞匯表中的常用單詞和短語,掌握倒裝句的一些基本用法。 技能目標(biāo)是能初步掌握約會(huì)的基本句型并在真實(shí)的場(chǎng)景下正確運(yùn)用。新聞報(bào)道類文章的寫作技能。采訪的基本規(guī)范和溝通技能。情感目標(biāo)是對(duì)新聞報(bào)道的客觀性和真實(shí)性有更好的理解。對(duì)新聞?dòng)浾叩穆殬I(yè)有更深入的了解,并能體會(huì)其工作的重要性。下面我們來介紹一下第一課時(shí)的授課方式,第一課的教學(xué)目標(biāo)是這樣的第一課時(shí)的教學(xué)目標(biāo)語言目標(biāo):單詞:Occupation, journalist, editor, photographer, curious, personality, enthusiasm

Then I would ask them to think of a funny English or Chinese and tell it to partners. While telling stories, they can use expressions and some acting to help make the story funny. 5 minutes would be given to do this.Those stories they told there will be the material for their writing. Soletting them tell it at first is helpful. And they can make a difference between telling a funny story and writing it down. Generally speaking, it is difficult forstudents to write well because they don’t know what to write and how to write. Asking them to tell their own stories at first can help them come up with what to write.After their telling, I would invite someone to share his/her story with all of us and I would write it down on the blackboard.This example story would be used as a sample to illustrate the format of funny story. Different from a story from teacher or textbook, a story from students can obviously become a interesting material to draw students’ attention.Then I would ask the whole class to put this story into several parts. It might be a little bit difficult for them. So I would ask them to find out whether all the sentences are necessary. After delete some sentences, there are 6 sentences left behind. Then they can easily put them into three parts. After interaction with students, I would teach them the right terms for each part and conclude the format of funny story.This step is the key and difficult point in my lesson. So I mainly usetask-based teaching method in this part and the task for students was divided into several stages. With the separated difficult level, students can find there are usually three parts in writing. They can also learn to write without the unnecessary parts in the process of analyzing. And then I wouldn’t rush to tell them the right terms to them directly. Instead, I would ask them to name them by their own. A confused mind is better for acquiring knowledge.While-writing:Then I would give students 7 minutes to write down this story, without other requirements.With all the preparations in pre-writing, students’ difficulties were cleared. So it would be much easier for them to write down the story within 7 minutes. There are no other requirements because students’ first writing is actually a drafting. It would be revise and edit several times later. Writing, as a skill

The oldest and the most popular park in the worldenjoy the exciting activities thereget close to the life-size cartoon characters like Mickey Mouse and Donald Duck Step 3 Pre-reading1.What do you suppose a theme park is ?2.What do you think you can see in a theme park?(1.It is a kind of amusement park which has a certain theme – that the whole park is based on. 2.buildings, castles, statues, rare animals and birds, and so on.) Step 4 Reading ----- Theme Parks –---- Fun and More Than Fun1.Predict : Read the title and the pictures on P. 34 and PredictWhat is the meaning of the title “Theme Park – Fun and more than fun”?(The title means that theme parks are fun to visit, but that they can also be educational and can offer useful information.)2.Skimming Fast read and answer:What activities can we take in a theme park?Amusement park: Bumper car Merry-go-round slide bungee jumping Free-fall rides Horror films Pirate ship Ferris wheel roller coaster3.Scanning Read again and you will find various theme parks are mentioned in the passage . Then what are they ?Theme parks: Sports theme park History theme park Culture theme park Marine or Ocean theme Park Future park Science theme park Disneyland4.Careful reading and find the main idea of each paragraph:THEME PARKS---- entertaining/ educationalPara.1 Traditional parks are places to go for relaxation and to have time away from our busy lives.Para.2 Theme parks are different They’re large and full of things to do, see and buy.Para.3 Theme parks are built around a single idea or theme. One example is a sports park.Para.4 Another kind of theme park is historical more and cultural and can be educational.Para.5 Disneylandwas the first theme park. It is based on the fantasy life and characters of Disney’s films.Para.6 Some examples of educational theme parks include sea world parks and science parks.

Knowledge objectives:(1) to make Ss grasp the usage of words, expressions and sentence structures: statistics, struggle, thanks to, rid of, some patterns for persuasion, the “ing” form as subject and object;(2)to use learnt knowledge to persuade sb.Ability objectives:(1) to develop Ss’ reading skills(skimming, scanning, word guessing);(2) to improve Ss’ speaking, communicating and cooperating skills.Emotional objectives:to make Ss know the contribution of Yuan,and learn his spirit and his simple life time.Teaching important and difficult points:(1) some words, expressions and sentence structures mentioned above;(2)the content of the text;(3)training their reading and speaking skills.Teaching methods: CLT, TBLT,QT.Learning strategies: CLS, QLS, TBLS.Teaching procedures:Step 1 lead-in: (1) teacher plays a piece of recent news from CCTV about the harvest of the super hybrid rice, and ask students whether they know Yuan or not, and talk about him and his contribution.(2)Brain storm: let Ss describe Yuan in their minds including his appearance, his living condition and so on.Step 2 fast reading tasks:(1)teacher introduces Yuan and super hybrid rice(2)make Ss read the text as fast as possible with questions. Such as: what’s the general ideaof this passage? What’s Yuan’ dream? (skimming and scanning skill)Step 3 intensive reading tasks(1)let Ss read the text silently, find topic sentence of each paragraph and draw the difficult sentences and the knowledge what they don’t understand.(words guessing)(2)teacher and Ss talk about the important words, expressions and sentences together, and ask Ss to retell the content of the text.(summarizing and paraphrasing)(3)teacher summarize this part.(4) read again following the courseware.

Teaching Aims:Knowledge 1. Get the students to learn the useful new words and expressions in this section. Aims:2. Let the students learn about how the UK was formed and the four groups of invaders.1. Develop students’ reading ability and let them learn different Ability reading skills. Aims:2. Enable students to learn to talk about the United Kingdom and the Union Jack Emotional 1. Let students know more about the UK2. Develop students’ sense of cooperative learning Aims:Teaching Important Points:1. Let the students learn about the countries of the United Kingdom and the Union Jack2. Get the students to read the passage and know about how the UK was formed and the four groups of invaders.3. Have the students learn different reading skills.Teaching Difficult Ponts:1. Develop students’ reading ability.2. Enable students to talk about the United Kingdom and the Union Jack.3. Let students learn how the UK was formed geographically and historically.Teaching Methods:Showing pictures, asking, exercising, listening, reading etc.Teaching Aids:A computer,a projector and a blackboard.Teaching Procedures: 1) Show a map of the world, ask students the following questions:Where is the UK?What’s the full name of the UK?2) Ask the students work in pairs to do the quiz on Page 9.Do you want to test how many things you know about the United Kingdom? Let’s have a small test.Using the map on P9, students answer the following questions:?How many countries does the UK consist of? What are they??England is divided into three main areas. Do you know what they are? 1) Scanning (10Minutes )Let the students hold the questions asked in pre-reading and read the passagequickly and then let them do the following exercise.Join lines to the right answer.

【點(diǎn)津】 1.不定式的復(fù)合結(jié)構(gòu)作目的狀語 ,當(dāng)不定式或不定式短語有自己的執(zhí)行者時(shí),要用不定式的復(fù)合結(jié)構(gòu)?即在不定式或不定式短語之前加 for +名詞或賓格代詞?作狀語。He opened the door for the children to come in. 他開門讓孩子們進(jìn)來。目的狀語從句與不定式的轉(zhuǎn)換 英語中的目的狀語從句,還可以變?yōu)椴欢ㄊ交虿欢ㄊ蕉陶Z作狀語,從而使句子在結(jié)構(gòu)上得以簡化??煞譃閮煞N情況: 1?當(dāng)目的狀語從句中的主語與主句中的主語相同時(shí),可以直接簡化為不定式或不定式短語作狀語。We'll start early in order that/so that we may arrive in time. →We'll start early in order to/so as to arrive in time. 2?當(dāng)目的狀語從句中的主語與主句中的主語不相同時(shí),要用動(dòng)詞不定式的復(fù)合結(jié)構(gòu)作狀語。I came early in order that you might read my report before the meeting. →I came early in order for you to read my report before the meeting.

1、教材的地位作用本課是新人教版普通高中歷史必修Ⅱ第六單元第18課的內(nèi)容,闡述羅斯福新政的背景、措施、影響。從單元知識(shí)安排看,本課與第17課《空前嚴(yán)重的資本主義世界經(jīng)濟(jì)危機(jī)》、19課《戰(zhàn)后資本主義的新變化》共同詮釋第六單元課題——《資本主義世界經(jīng)濟(jì)政策的調(diào)整》。說明了“資本主義經(jīng)濟(jì)理論和政策隨著資本主義發(fā)展而不斷調(diào)整的特點(diǎn)”,凸顯了“市場(chǎng)調(diào)節(jié)”和“國家干預(yù)”在經(jīng)濟(jì)發(fā)展中的重要性。從知識(shí)體系看,它是學(xué)生學(xué)習(xí)了第一次工業(yè)革命后自由資本主義、第二次工業(yè)革命后的壟斷資本主義等之后出現(xiàn)的,既是對(duì)上述知識(shí)的鞏固與綜合運(yùn)用,又為學(xué)生學(xué)習(xí)必修二的相關(guān)內(nèi)容打下基礎(chǔ),有承上啟下的作用。本課三個(gè)子目從邏輯上看又是遞進(jìn)關(guān)系。第一個(gè)子目“臨危受命”承上啟下,說明了羅斯福上臺(tái)的歷史背景具有臨危受命的特點(diǎn),第二個(gè)子目“實(shí)施新政”講述了羅斯福新政的主要內(nèi)容,第三個(gè)子目“擺托危機(jī)困境”主要講述了羅斯福新政的影響。

(2).教學(xué)手段為了使我根據(jù)教材而設(shè)計(jì)的三個(gè)教學(xué)目標(biāo)以及重點(diǎn)難點(diǎn)得以的突出和突破,達(dá)到最大化的展示境界,同時(shí)也為了配合以上我選擇的四種教法得以完滿實(shí)現(xiàn),我決定采用“多媒體”教學(xué)手段進(jìn)行全程教學(xué)。利用電腦的信息容量大,操作簡便等優(yōu)點(diǎn),形象生動(dòng)的直觀展示教學(xué)內(nèi)容,不但提高學(xué)習(xí)效率和質(zhì)量,而且容易激發(fā)學(xué)生的學(xué)習(xí)興趣和調(diào)動(dòng)學(xué)習(xí)的積極性。四、說學(xué)法我為學(xué)生設(shè)計(jì)了三個(gè)學(xué)習(xí)方法:1.讓學(xué)生學(xué)會(huì)在探究中學(xué)。通過“對(duì)黑人嚴(yán)酷處境的探究”和對(duì)文中重點(diǎn)語句的探究,培養(yǎng)學(xué)生在探究中學(xué)習(xí)的能力。2.讓學(xué)生學(xué)會(huì)在讀中學(xué)。通過“誦讀法”指導(dǎo)學(xué)生在誦讀過程中感受演講詞內(nèi)在的魅力,學(xué)會(huì)在讀中學(xué)。3.讓學(xué)生學(xué)會(huì)在練習(xí)中學(xué)。通過“課外延伸練習(xí)法”,對(duì)所學(xué)的知識(shí)進(jìn)行運(yùn)用,培養(yǎng)學(xué)生的創(chuàng)新和自學(xué)能力。

觀察實(shí)驗(yàn)視頻實(shí)驗(yàn)驗(yàn)證師:其實(shí)大家完全可以利用身邊的器材來驗(yàn)證。實(shí)驗(yàn)1、用彈簧秤掛上鉤碼,然后迅速上提和迅速下放。現(xiàn)象:在鉤碼被迅速上提的一瞬間,彈簧秤讀數(shù)突然變大;在鉤碼被迅速下放的一瞬間,彈簧秤讀數(shù)突然變小。師:迅速上提時(shí)彈簧秤示數(shù)變大是超重還是失重?迅速下放時(shí)彈簧秤示數(shù)變小是超重還是失重?生:迅速上提超重,迅速下放失重。體會(huì)為何用彈簧秤測(cè)物體重力時(shí)要保證在豎直方向且保持靜止或勻速實(shí)驗(yàn)2、學(xué)生站在醫(yī)用體重計(jì)上,觀察下蹲和站起時(shí)秤的示數(shù)如何變化?在實(shí)驗(yàn)前先讓同學(xué)們理論思考示數(shù)會(huì)如何變化再去驗(yàn)證,最后再思考。(1)在上升過程中可分為兩個(gè)階段:加速上升、減速上升;下蹲過程中也可分為兩個(gè)階段:加速下降、減速下降。(2)當(dāng)學(xué)生加速上升和減速下降時(shí)會(huì)出現(xiàn)超重現(xiàn)象;當(dāng)學(xué)生加速下降和減速上升時(shí)會(huì)出現(xiàn)失重現(xiàn)象;(3)出現(xiàn)超重現(xiàn)象時(shí)加速度方向向上,出現(xiàn)失重現(xiàn)象時(shí)加速度方向向下。完全失重

2、活動(dòng)既符合幼兒的年齡特點(diǎn)又對(duì)幼兒具有一定的挑戰(zhàn)性。中班幼兒已有一定的語言基礎(chǔ),思維和表達(dá)能力也有了相應(yīng)發(fā)展,這樣可以讓幼兒結(jié)合生活經(jīng)驗(yàn)自由表達(dá)自己對(duì)陌生人的認(rèn)識(shí),而如何辨別陌生人的善于惡,靈活應(yīng)對(duì)陌生人的來訪又對(duì)幼兒的社會(huì)交往智能是一個(gè)考驗(yàn)。3、對(duì)幼兒實(shí)施自我保護(hù)的教育符合《綱要》精神?!毒V要》中指出:“幼兒應(yīng)知道必要的安全保健常識(shí),學(xué)習(xí)保護(hù)自己。二、說教材現(xiàn)實(shí)生活中一些不法分子以哄騙為手段拐賣兒童,他們的罪惡行徑給孩子的身心造成巨大摧殘,使許多家庭沉浸在失去孩子的痛苦中,給社會(huì)也帶來極大的危害。在公安機(jī)關(guān)追蹤調(diào)查的同時(shí),我們教師從教育角度著手讓孩子學(xué)會(huì)自己保護(hù)自己,從某種程度上加強(qiáng)了幼兒的保護(hù)力度。選取《不跟陌生人走》開展活動(dòng)三、說活動(dòng)目標(biāo)1、(認(rèn)知目標(biāo))引導(dǎo)幼兒了解一些自我保護(hù)的常識(shí),知道不能輕信陌生人的話,不跟陌生人走。2、(情感目標(biāo))樹立初步的防范意識(shí)。3、(能力目標(biāo))培養(yǎng)幼兒思考問題、解決問題的能力。四、說重點(diǎn)難點(diǎn)活動(dòng)重點(diǎn):樹立防范意識(shí),學(xué)習(xí)自我保護(hù)的方法。(第三環(huán)節(jié))活動(dòng)難點(diǎn):培養(yǎng)幼兒思考問題、解決問題的能力。(第四環(huán)節(jié))

⑦在仰韶文化時(shí)期,我國就有了對(duì)竹利用的確切記載。竹自竹簡、珠筆到竹紙,在保存和傳播我們中華民族的古老文化上立下了汗馬功勞。以竹為題材的詩詞歌賦,用竹編織和雕刻的藝術(shù)品,竹制的笙管笛簫奏出的音樂,無不給人類美的享受。⑧在我國文化史上,竹蘊(yùn)含著中華民族重要的精神價(jià)值。人們?cè)陂L期的勞動(dòng)實(shí)踐和文化活動(dòng)中,把竹的生物特征逐漸升華為一種做人的美德。竹四季常青,不畏逆境,和松、梅并譽(yù)為“歲寒三友”;竹中空外直,虛懷若谷,和梅、蘭、菊并稱為“四君子”。⑨無論是魏晉嵇康、向秀等“竹林七賢”,還是唐朝李白、韓準(zhǔn)等“竹溪六逸”,莫不對(duì)竹有一份執(zhí)著和憧憬,清代鄭板橋,與竹為鄰,以竹為友,愛竹、寫竹、畫竹、贊竹?!扒トf擊還堅(jiān)韌,任爾東西南北風(fēng)”,正是他堅(jiān)忍不拔、超凡脫俗的人格寫照。

①2014年年中,世界衛(wèi)生組織(WHO)公布了《2013年全球氣候狀況報(bào)告》。報(bào)告顯示,2013年全球陸地和海洋表面平均溫度為14.5℃,比1961-1990年的平均溫度升高0.5℃。自有溫度記錄以來,全球14個(gè)最熱年份中有13個(gè)出現(xiàn)在本世紀(jì),而過去30年中每個(gè)10年都比前十年更熱。②厄爾尼諾是發(fā)生在熱帶太平洋上海溫異常增暖的氣候現(xiàn)象,大范圍熱帶太平洋增暖會(huì)造成全球氣候變化。進(jìn)入20世紀(jì)70年代后,全球出現(xiàn)的異常天氣,都有范圍廣、災(zāi)情重、時(shí)間長等特點(diǎn),而在這一系列異常天氣的背后,厄爾尼諾暖流都起著重要作用。

青蒿素治療瘧疾效果顯著,是抵抗瘧疾耐藥性最好的藥物。中國發(fā)現(xiàn)青蒿素時(shí),美國也研制出一種抗瘧新藥—化學(xué)合成的甲氟喹,但瘧原蟲很快就適應(yīng)了它,產(chǎn)生耐藥性,臨床使用后患者還出現(xiàn)了明顯的不良反應(yīng)。而對(duì)于青蒿素這種從中草藥中提取的藥物,瘧原蟲對(duì)它完全沒有抵抗能力。1976 年1月,柬埔寨爆發(fā)瘧疾,因瘧原蟲已經(jīng)產(chǎn)生耐藥性,疫情一時(shí)難以控制。中國醫(yī)療隊(duì)攜帶一批青蒿素在柬埔寨大顯神威,挽救了一大批瘧疾患者的生命。

隨著自己的不斷長大,發(fā)現(xiàn)我們身上的責(zé)任也越來越大,因?yàn)槲覀兪切聲r(shí)代的青年,我們要做好自己的責(zé)任,要努力學(xué)習(xí)。都說我們是垮掉的一代,實(shí)際上并不是,我們是抗疫的主力軍,沖在最前面為國家人民保駕護(hù)航! 共青團(tuán)建團(tuán)百年作為新時(shí)代的的青年,我們要樹立愛國主義精神,國家的前途,民族的命運(yùn),人民的幸福,是當(dāng)代中國青年必須和必將承擔(dān)的重任?! ∫员阋院鬄閲液腿嗣瘾I(xiàn)上自己的一份力,在不遠(yuǎn)的將來我們國家會(huì)越來越好,中華民族屹立于世界民族之林,實(shí)現(xiàn)中華民族偉大復(fù)興。

設(shè)疑自探:一個(gè)壓縮或拉伸的彈簧就是一個(gè)“儲(chǔ)能器”,怎樣衡量形變彈簧蘊(yùn)含能量的多少呢?彈簧的彈性勢(shì)能的表達(dá)式可能與那幾個(gè)物理量有關(guān)?類比:物體的重力勢(shì)能與物體所受的重力和高度有關(guān)。那么彈簧的彈性勢(shì)能可能與所受彈力的大小和在彈力方向上的位置變化有關(guān),而由F=kl知彈簧所受彈力等于彈簧的勁度系數(shù)與形變量的乘積。預(yù)測(cè):彈簧的彈性勢(shì)能與彈簧的勁度系數(shù)和形變量有關(guān)。學(xué)生討論如何設(shè)計(jì)實(shí)驗(yàn): ①、用同一根彈簧在幾次被壓縮量不同時(shí)釋放(勁度系數(shù)相同,改變形變量),觀察小車被彈開的情況。②、分別用兩根彈簧在被壓縮量相同時(shí)釋放(形變量相同,勁度系數(shù)不同),觀察小車被彈開的情況。交流探究結(jié)果:彈性勢(shì)能隨彈簧形變量增大而增大。隨彈簧的勁度系數(shù)的增大而增大。

1.導(dǎo)入新課:用觸目精心的一首MTV《EARTHSONG》導(dǎo)入新課,引出人類已經(jīng)面臨嚴(yán)峻的人口、資源與環(huán)境的危機(jī)。而中國是世界上人口最龐大的國家,人口、資源與環(huán)境問題更加嚴(yán)重。既然我們知道了可持續(xù)發(fā)展的概況,了解了它的發(fā)展過程,從上節(jié)課內(nèi)容的分析中,也理解了作為人類的發(fā)展,可持續(xù)是唯一的選擇,也是我們所追求的目標(biāo),那么,具體到我們國家、我們周圍的生產(chǎn)、生活情況又該如何呢?2.新課講授:首先,通過三則補(bǔ)充材料的案例和課本上的內(nèi)容分別說明龐大的人口壓力,資源短缺和不合理利用,深刻的環(huán)境危機(jī)方面的問題,得出走可持續(xù)發(fā)展之路是我國的必然的唯一的選擇。接著通過《中國21世紀(jì)議程》——中國21世紀(jì)人口環(huán)境與發(fā)展的白皮書的過渡引出實(shí)施可持續(xù)發(fā)展的途徑。在這部分內(nèi)容的講解上,主要通過其中一種主要途徑-循環(huán)經(jīng)濟(jì)的講解,特別是對(duì)清潔生產(chǎn)和生態(tài)農(nóng)業(yè)的具體分析,總結(jié)出中國走可持續(xù)發(fā)展之路事在必行,行必有果。再通過完成課本上最后一個(gè)活動(dòng)題對(duì)本節(jié)內(nèi)容進(jìn)行深化。

4、種群數(shù)量變化的其他類型我結(jié)合“種群數(shù)量下降”這個(gè)知識(shí)點(diǎn)對(duì)學(xué)生進(jìn)行寓教?,F(xiàn)今的自然界,許多野生生物種群的數(shù)量都在下降,為什么呢?我提供了世界人口近2000年的種群增長曲線,一切都在不言而喻中?,F(xiàn)今社會(huì)的主題是呼吁建立和諧社會(huì),作為生物老師,我想它不應(yīng)該僅僅指人與人之間的和諧,也不應(yīng)該僅僅指人與社會(huì)之間的和諧,它更應(yīng)該昭示著人與自然之間的和諧,人類只有學(xué)會(huì)與自然和諧相處,才能在生物圈中享受最大的幸福。6、小結(jié)課程在實(shí)驗(yàn)的大背景下展開,也在實(shí)驗(yàn)的背景中結(jié)束,這里可以呈現(xiàn)出一個(gè)完整的探究思路。同時(shí),學(xué)生思考如何實(shí)現(xiàn)多種預(yù)期過程,相當(dāng)于對(duì)本課進(jìn)行小結(jié)。五、效果預(yù)測(cè)課堂上選取的內(nèi)容基于學(xué)生的生活體驗(yàn),創(chuàng)設(shè)的情境能激發(fā)學(xué)生的興趣,設(shè)置的問題符合學(xué)生的認(rèn)知水平,有助于學(xué)生能力的提高,教學(xué)目標(biāo)可以基本實(shí)現(xiàn)。

1.潛在價(jià)值──某種不知名的昆蟲。間接價(jià)值──每個(gè)物種都維系著它們所在的生態(tài)系統(tǒng)的結(jié)構(gòu)和功能。直接價(jià)值──蘆葦是一種重要的造紙?jiān)?;蟬蛻是一種動(dòng)物性藥物;魯班通過觀察某種葉片的葉緣得到啟示,研制出了木工用的鋸;海洋和森林等生態(tài)系統(tǒng)能陶冶情操、激發(fā)創(chuàng)作的靈感。2.主要的困難是,一些發(fā)達(dá)國家(如美國、加拿大和歐盟國家等),拒絕核準(zhǔn)或遲遲不予核準(zhǔn)該議定書。主要爭議的問題是,這些國家擔(dān)心影響本國經(jīng)濟(jì)的發(fā)展和其他國家可能不承擔(dān)相應(yīng)的責(zé)任。例如,美國政府在2003年3月以“減少溫室氣體排放將會(huì)影響美國經(jīng)濟(jì)發(fā)展”和“發(fā)展中國家也應(yīng)該承擔(dān)減排和限排溫室氣體的義務(wù)”為由,宣布拒絕執(zhí)行《京都議定書》。建議世界各國特別是發(fā)展中國家聯(lián)合起來,通過聯(lián)合國大會(huì)和各國的政府以及民間組織等多種途徑,呼吁每年大量產(chǎn)生溫室氣體的發(fā)達(dá)國家率先核準(zhǔn)《京都議定書》(我國政府早在2002年9月就核準(zhǔn)了《京都議定書》)。

總結(jié)與大自然和諧相處走可持續(xù)發(fā)展道路。在我們的努力下地球一定能為我們?nèi)祟愄峁└玫纳姝h(huán)境這部分的設(shè)計(jì)意圖是培養(yǎng)學(xué)生綜合實(shí)踐能力把新知識(shí)內(nèi)化為學(xué)生生活行為中的具體行動(dòng)。五、說板書設(shè)計(jì)這樣設(shè)計(jì)能直觀形象地體現(xiàn)知識(shí)結(jié)構(gòu)、突出重點(diǎn)難點(diǎn)、利于鞏固新知識(shí)。六、說作業(yè)設(shè)計(jì)1、課本P80練習(xí)——常規(guī)作業(yè)主要為鞏固和落實(shí)認(rèn)知目標(biāo)服務(wù)。2、活動(dòng)與探究以“警惕外來物種入侵”為題寫一篇科普文章。——開放性作業(yè)學(xué)生在自主完成任務(wù)的同時(shí)可以相互合作通過自主學(xué)習(xí)所獲得的成果經(jīng)共享共同整理、歸納、分類得到一種比較完整的答案。七、說教學(xué)反思1、本節(jié)教學(xué)過程主要重視運(yùn)用“動(dòng)態(tài)發(fā)展觀”來組織實(shí)施教學(xué)用歷史性的眼光從縱向進(jìn)行尋蹤綜合利用視頻、圖片等直觀教具動(dòng)態(tài)地展示群落演替的過程幫助學(xué)生更好地理解群落演替的過程及本質(zhì)。
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