
我以以《登高》為例,引導(dǎo)學(xué)生進(jìn)行意象分析,感悟意境美。古人云“立象以盡意”“古詩(shī)之妙,專求意象”意象是詩(shī)人情感的載體,是詩(shī)歌的靈魂。引導(dǎo)學(xué)生張開(kāi)聯(lián)想和想象的翅膀去感受,去體驗(yàn)是意象,詩(shī)歌鑒賞的關(guān)鍵??屏治榈抡f(shuō)“真正藝術(shù)的作品,不是看見(jiàn)的,也不是聽(tīng)到的,而是想象中的某種東西。”詩(shī)人通過(guò)想象創(chuàng)造出詩(shī)的形象,我們讀者通過(guò)想象豐富地再現(xiàn)詩(shī)人創(chuàng)造的形象。而感受體驗(yàn)則是以全部身心投入作品,心靈與心靈相溝通,感情與感情相交流,對(duì)詩(shī)人的想象活動(dòng)進(jìn)行再經(jīng)歷和再體驗(yàn)。因此,在引導(dǎo)意象解讀中,我先讓學(xué)生點(diǎn)擊這一個(gè),就是通過(guò)抓修飾詞、依據(jù)感情基調(diào)、展開(kāi)想象具體分析本詩(shī)中每個(gè)意象的情感意蘊(yùn)和審美意蘊(yùn),使學(xué)生明白意象在每首詩(shī)中的獨(dú)特性。

說(shuō)教材A.教材簡(jiǎn)析《琵琶行(并序)》是人教版《普通高中課程標(biāo)準(zhǔn)實(shí)驗(yàn)教科書(shū)語(yǔ)文》必修3第二單元的一篇講讀課文。本單元學(xué)習(xí)的是唐代詩(shī)歌,共七首詩(shī)。《琵琶行(并序)》是唐代著名現(xiàn)實(shí)主義詩(shī)人白居易寫(xiě)的一首歌行體長(zhǎng)篇敘事詩(shī),是我國(guó)古代敘事詩(shī)和音樂(lè)詩(shī)中的“千古絕喝”。詩(shī)歌主題鮮明、人物形象生動(dòng),抒情真切細(xì)膩,具有深刻的思想內(nèi)容和卓越的藝術(shù)技巧。B.教學(xué)目標(biāo)《全日制普通高中高級(jí)中學(xué)語(yǔ)文教學(xué)大綱》明確要求我們:在閱讀教學(xué)過(guò)程中要引導(dǎo)學(xué)生“感受文學(xué)形象,品味文學(xué)作品的語(yǔ)言和藝術(shù)技巧,初步鑒賞文學(xué)作品”。而本單元的教學(xué)要求是培養(yǎng)學(xué)生詩(shī)歌鑒賞的能力。根據(jù)教學(xué)大綱和單元教學(xué)要求,結(jié)合本課特點(diǎn),我制定本課的教學(xué)目標(biāo)是:1.知識(shí)目標(biāo):了解文學(xué)常識(shí);積累重點(diǎn)文言實(shí)詞;品味主旨句“同是天涯淪落人,相逢何必曾相識(shí)”的內(nèi)涵;感知作者把音樂(lè)描寫(xiě)與聽(tīng)者、演奏者的感情融為一體的寫(xiě)作特點(diǎn)。

(1)“問(wèn)君西游何時(shí)還……使人聽(tīng)此凋朱顏?!痹?shī)題下未注明送何人入蜀,所以這里的“問(wèn)君”無(wú)妨假定實(shí)有其人,可以讀得親切一些。將行而問(wèn)“何時(shí)還”,已有不可行之意,重音要落在“不可攀”三字上,當(dāng)用勸說(shuō)的語(yǔ)氣讀。以下四句借鳥(niǎo)聲渲染旅途中悲涼凄清的氛圍,讀時(shí)要放低聲調(diào),有干里孤身之感,至“愁空山”徐徐而上。然后用感喟的語(yǔ)調(diào)讀主旨句,至“凋朱顏”略作一頓,以示意猶未盡。(2)“連峰去天不盈尺……胡為乎來(lái)哉!”仍是說(shuō)不可行,但內(nèi)容加深了一層,因?yàn)檎f(shuō)的是蜀道的險(xiǎn)惡。前四句不是純客觀的描寫(xiě),讀時(shí)須設(shè)想這是旅游者攀援于“連峰”“絕壁”之上置身于“飛湍瀑流”之間,要使聽(tīng)者感到驚心動(dòng)魄。讀后可作稍長(zhǎng)停頓,再用“其險(xiǎn)也如此”緩緩收住。末句是詩(shī)人借用蜀人的口氣,對(duì)歷險(xiǎn)而來(lái)的游者深表嘆息——“胡為乎來(lái)哉”不是詢問(wèn),當(dāng)用降調(diào)讀,暗含“何苦而來(lái)”之意。

教材地位本課具有承上啟下的作用,前承文藝復(fù)興,后啟資產(chǎn)階級(jí)革命時(shí)代的到來(lái),啟蒙運(yùn)動(dòng)為資本主義社會(huì)構(gòu)建了一套政治藍(lán)圖,具有前瞻性,是近代第二次思想解放運(yùn)動(dòng)。因此,本節(jié)內(nèi)容在整個(gè)教材中有著很重要的地位。教學(xué)目標(biāo)1、知識(shí)目標(biāo):(1)幫助學(xué)生了解啟蒙運(yùn)動(dòng)的性質(zhì)、內(nèi)容和主要啟蒙 思想家及其主張。(2)理解啟蒙運(yùn)動(dòng)興起的背景、影響。2、能力目標(biāo):(1)在討論和探究過(guò)程中訓(xùn)練學(xué)生的科學(xué)思維方法和自主學(xué)習(xí)的能力和掌握解題的方法。(2)通過(guò)指導(dǎo)學(xué)生閱讀啟蒙思想家的言論資料,培養(yǎng)學(xué)生對(duì)歷史資料的理解和歸納能力。3、情感價(jià)值目標(biāo):(1)培養(yǎng)人文意識(shí),強(qiáng)化法治觀念。(2)培養(yǎng)學(xué)生的團(tuán)結(jié)協(xié)作精神和競(jìng)爭(zhēng)意識(shí)。教學(xué)重點(diǎn)、難點(diǎn)(1)教學(xué)重點(diǎn):?jiǎn)⒚伤枷爰业闹鲝埣皢⒚蛇\(yùn)動(dòng)的影響。

一、說(shuō)教材《開(kāi)辟新航路》是高中《歷史·必修二》第5課的內(nèi)容。從三個(gè)方面向?qū)W生介紹了歐洲人開(kāi)辟新航路的歷史:即新航路開(kāi)辟的原因和條件、新航路開(kāi)辟經(jīng)過(guò)以及影響。前4課內(nèi)容介紹了古代中國(guó)經(jīng)濟(jì)的基本結(jié)構(gòu)與特點(diǎn),從第5課開(kāi)始學(xué)習(xí)資本主義世界市場(chǎng)的形成和發(fā)展。本課內(nèi)容相當(dāng)重要,上承古代中國(guó),下啟近代世界。新航路的開(kāi)辟,打破了世界相對(duì)隔絕的狀態(tài),世界真正開(kāi)始融合為一個(gè)整體。從此,以西歐為中心的世界市場(chǎng)的雛形開(kāi)始出現(xiàn)。隨后的殖民擴(kuò)張,世界市場(chǎng)拓展;第一次工業(yè)革命,世界市場(chǎng)基本形成;第二次工業(yè)革命,世界市場(chǎng)發(fā)展。二、說(shuō)目標(biāo)1、課程標(biāo)準(zhǔn)概述迪亞士、哥倫布開(kāi)辟新航路的史實(shí),認(rèn)識(shí)地理大發(fā)現(xiàn)對(duì)世界市場(chǎng)形成的意義。2、三維目標(biāo)①知識(shí)與能力:掌握新航路開(kāi)辟的原因、經(jīng)過(guò)、影響。②過(guò)程與方法:引導(dǎo)學(xué)生分析原因及影響,培養(yǎng)學(xué)生分析和歸納問(wèn)題的能力。③情感態(tài)度與價(jià)值觀:A、通過(guò)對(duì)新航路開(kāi)辟過(guò)程的學(xué)習(xí),使學(xué)生感受和學(xué)習(xí)探險(xiǎn)家們勇于進(jìn)取的開(kāi)拓精神。B、通過(guò)學(xué)習(xí)新航路開(kāi)辟的影響,使學(xué)生認(rèn)識(shí)新航路開(kāi)辟促進(jìn)了人類(lèi)社會(huì)的整體發(fā)展。

一. 教材分析1. 本單元的中心話題是“計(jì)算機(jī)(Computers)”,內(nèi)容涉及計(jì)算機(jī)的發(fā)展歷史,計(jì)算機(jī)的應(yīng)用等。本節(jié)課是該單元的第一課時(shí),我將Warming up, Pre-reading and Comprehending這四部分整合為一節(jié)精讀課。其中。Reading部分是題為WHO AM I?的文章,以第一人稱的擬人手法介紹了計(jì)算機(jī)發(fā)長(zhǎng)演變的歷史和計(jì)算機(jī)在各個(gè)領(lǐng)域的應(yīng)用,其主旨是表達(dá)計(jì)算機(jī)的發(fā)展變化之快以及在生活中用途之廣。而Warming up部分以圖片的形式展現(xiàn)了計(jì)算機(jī)的發(fā)展歷程;Pre-reading中的問(wèn)題和排序分別是為了預(yù)測(cè)語(yǔ)篇的內(nèi)容和測(cè)試學(xué)生對(duì)計(jì)算機(jī)歷史了解的情況;Comprehending則通過(guò)各項(xiàng)練習(xí)訓(xùn)練學(xué)生的閱讀技能,從而加深對(duì)文章的理解??梢?jiàn)這幾部分是一個(gè)有機(jī)的整體。2. 教學(xué)目標(biāo):1) 語(yǔ)言目標(biāo):重點(diǎn)詞匯及短語(yǔ):abacus, calculate, calculator, PC, laptop, PDA, robot, analytical, technological, universal, mathematical, artificial, intelligent, network, explore, in common, as a result.重點(diǎn)句子:a. My real father was Alan Turing, who in 1963 wrote a book to describe how computers could be made to work, and build a “universal machine” to solve any mathematical problem.

Good afternoon, teachers, It’s my great pleasure to be here sharing my lesson with you.The content of my lesson is Senior English Book 3 Unit 5 Canada —— “The true North”.I’ll be ready to begin this lesson from five parts. Analysis of the teaching material,the teaching methods,the studying methods, the teaching procedure,and Blackboard design.First, let me talk about the teaching material.Part 1 Teaching Material:This unit is about the introduction of Canada. By studying of this unit,we’ll enable the students to learn the geography, population, main cities, and natural beauty, natural resources of Canada. Through the training of the unit, it also requires students to learn some Language skills such as the expressions of position and emotions.So it plays an important part in the English teaching in this book.After studying the teaching material and analyzing the rule of children’s growing of mind,I think the teaching aims are the followings:1.Knowledge objects:(1) make the students learn some new words and phrases(2) make the students understand the content of the lesson.2.Ability objects:(1)To develop the Ss’ abilities of listening, speaking, reading and writing. Especially reading and speaking ability.(2) learn to talk about the characters of Canada in English(3)To train the Ss’ ability of working in pairs.3.Emotion objects:(1)Enable students to understand the characters of Canada..(2)Stimulate Ss to work hard to make China stronger.Part 2 Teaching Methods:I think helping students learn to master new words and phrases and improve the students’ reading and speaking ability is import and the difficult.According to the analysis of the teaching material and the import points and the difficult points,I will use the following teaching methods : question-guiding approach; fast-reading and careful reading; multi-media teaching methods; discussion

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.

Language learning needs a context, which can help the learners to understand the language and then can product comprehensible output, so computer has the advantages to make the materials attractive.Part 3 Learning MethodsTask-based, self-dependent and cooperative learningPart 4 Teaching ProcedureStep One Lead-in“Interest is the best teacher.” Therefore, at the very beginning of the class, I should spark the students’ mind to focus on the centre topic “the band”. I’ll show some pictures of food to attract their attention and then bring some questions.Question:What kind of food they like?What should go into a good meal?The answers must relate to the diet. After this, the students will be eager to know something about a balance diet and this is the very time to naturally lead the class into Step 2Step 2 Reading for information: skimming and scanning In this step, I use Task-based Language Teaching method, which can give students a clear and specific purpose while skimming and scanning the context.Task 1 General ideaThe students will be asked to just glance at the title and the pictures of the passage, and then guess what they will read in the text. And they’ll be divided into groups of four to have a discussion.The purpose is to inspire the students to read actively, not passively. In addition, the task is to develop the students’ reading skill by making prediction and to encourage the students to express their thoughts in English and cooperate with each other.Task 2 Main idea of each paragraphCooperative learning can raise the students’ interest and create an atmosphere of achievement. Based on this theory, I divide the whole class into 4 groups to skim the whole text and get the main idea of each paragraph.

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.

1.說(shuō)教材《記念劉和珍君》是魯迅先生用飽醮著熱淚,用悲憤的筆調(diào)寫(xiě)下的一篇感人至深的散文,既有對(duì)愛(ài)國(guó)青年沉痛的悼念,又有對(duì)反動(dòng)派憤怒的控訴,也有對(duì)覺(jué)醒的國(guó)民的吶喊?!队浤顒⒑驼渚肥歉咧姓Z(yǔ)文必修1第三單元第一課的講讀課文。文中描摹人物的音容笑貌,敘述人物的行為事跡,都融入了作者真摯的情感和深刻的感悟。對(duì)學(xué)生明辨是非,領(lǐng)悟時(shí)代精神和人生意義,有著重要的作用。新課標(biāo)強(qiáng)調(diào)了要全面提升高中學(xué)生的語(yǔ)文素養(yǎng),初步形成正確的世界觀、人生觀、價(jià)值觀,并學(xué)會(huì)收集、判斷、處理信息,具有人文素養(yǎng)、創(chuàng)新精神與實(shí)踐能力。同時(shí),《記念劉和珍君》感情真摯,感悟深刻,具有典型人文性。結(jié)合本單元教學(xué)目標(biāo),確立教學(xué)目標(biāo)如下。

4、學(xué)習(xí)全詞:(1)背景介紹,讓學(xué)生看課文中的年代,然后讓學(xué)生回憶1925年的毛澤東的情況,老師適當(dāng)提示,讓學(xué)生了解其背景。(出示幻燈片)(2)學(xué)生自由朗讀,結(jié)合注釋和背景理解詩(shī)詞。(3)師生共同理解全詞①先讓學(xué)生齊讀前三句,思考正確的語(yǔ)序,并用正常的語(yǔ)序解釋。②品味第三到第十句,這里是教學(xué)的一個(gè)重點(diǎn),要讓學(xué)生先讀,再理解,在此基礎(chǔ)上訓(xùn)練學(xué)生的想象能力。③分析上闕中的最后三句。④小結(jié)上闕。提出了一個(gè)問(wèn)題“誰(shuí)主沉浮”讓學(xué)生在文中找內(nèi)容回答,然后轉(zhuǎn)入下闕內(nèi)容的分析。⑤分析下闕內(nèi)容,回答“誰(shuí)主沉浮”的問(wèn)題,突出本文主旨5、描繪詩(shī)詞形象:學(xué)生用自己的語(yǔ)言把上闕的內(nèi)容生動(dòng)地描繪出來(lái)。6、欣賞學(xué)生優(yōu)秀作品。(根據(jù)時(shí)間具體而定,也可以作為課后作業(yè))

(二)分析課文,理清思路第1、2段為第一部分,主要是敘事、寫(xiě)景,先敘述集會(huì)的時(shí)間、地點(diǎn),然后渲染出蘭亭優(yōu)美的自然環(huán)境。在這里足以“游目騁懷”“極視聽(tīng)之娛”,可以自由地觀察、思考,滿足人們目視耳聞的需求。這里正是與會(huì)“暢敘幽情”、盡興盡歡的絕好處所。這些描寫(xiě)都富有詩(shī)情畫(huà)意,作者的情感是輕松愉快的。第3、4段為第二部分,主要是抒情、議論,作者由美景妙時(shí)引發(fā)出樂(lè)與憂、生與死的感慨。他認(rèn)為人生的快樂(lè)是有極限的,待快樂(lè)得到滿足時(shí),就會(huì)感覺(jué)興味索然。往事轉(zhuǎn)眼間便成為歷史,人到了生命的盡頭就會(huì)死亡。作者由“一死生為虛誕,齊彭殤為妄作”的認(rèn)識(shí),產(chǎn)生了一種珍惜時(shí)間、眷戀生活、熱愛(ài)文明的思考。雖然文中的壽夭、生死不能自由決定,從而有些傷感,但作者仍然認(rèn)識(shí)到盛衰、生死是必然的。人生無(wú)常,時(shí)不我待,故著文留傳后世,以承襲前人,啟示來(lái)者。

生2:頷聯(lián)的意思是只聽(tīng)到禁衛(wèi)軍中傳來(lái)夜間巡邏的梆子聲,不再向?qū)m中那樣安逸地聽(tīng)到有雞人打鳴報(bào)時(shí)的聲音了。生3:頸聯(lián)的意思是說(shuō)事變發(fā)生那天軍隊(duì)發(fā)生嘩變停留不前,但當(dāng)年唐玄宗以為自己可以和貴妃天天在一起,對(duì)天上的牽牛和織女一年一度的會(huì)見(jiàn)還加以嘲笑呢。生4:尾聯(lián)的含義是為什么唐玄宗當(dāng)了四十五年的皇帝,還不如普通百姓夫妻恩愛(ài),長(zhǎng)相廝守。師:好的。請(qǐng)大家再齊讀一遍詩(shī)文,做到人人都能疏通詩(shī)的含義。學(xué)生再次齊讀。第三環(huán)節(jié):專項(xiàng)探究師:白居易曾說(shuō):“文章合為時(shí)而著,歌詩(shī)合為事而作?!边@首詩(shī)就是作者途經(jīng)馬嵬驛,詠馬嵬之變這一歷史事件而作,所以我們鑒賞的第三步,就是通過(guò)標(biāo)題和詩(shī)文,弄清詩(shī)中的歷史事件。請(qǐng)同學(xué)們找出詩(shī)中哪些詩(shī)句描述了這一事件?

When it comes to the students’ studying methods, I'd like to introduce my Ss first. The Ss have a good command of basic language points. They’re interested in learning English, and they take an active part in English class, so they will have fun in autonomous, cooperative and inquiry learning. I will just serve as a guide, showing them the way to explore how to make more progress in their English learning.Now it’s time for the most important stage of this lesson. My teaching procedures are arranged as follows:Step1.Leading-in (3 minute)Play a video of a wide variety of wildlife to introduce my topic. Step2. Speaking (12 minutes)We will use our textbook Page25. Let the Ss fast read the short paragraph to warm up. Ask them to talk about the report on some endangered wildlife in China with the dialogue patterns on the screen. Lastly, I will invite some groups to demonstrate their dialogues about saving wildlife in China.Step3.English play (3 minutes)Watch another video in praise of their excellent performance just now. It’s about Jack Chen’s(成龍)and Yang Ziqiong’s wildlife protection.Step4. Listening (twice 13 minutes)This time, I’ll ask the Ss to fill in the blanks of the monologue of the 2 movie stars above. Step5.Discussion (3 minutes)Which would you like to choose to wear, clothes made of cotton, artificial leather or animal skins? Why ?Step6. Summary (3 minutes)1. If there were no wildlife, there wouldn’t exist human beings. If the buying stops, the killing can, too.2. Animals are our friends. To love animals is to love ourselves. Stop hunting, killing and destroying wildlife.3. Let’s live in harmony with all the living things in the world. Step7. Music appreciation (3 minutes)Let the Ss appreciate the song Earth Song by Michael Jackson. Last but not the least, I will show you my blackboard design.

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

本節(jié)課是人教社物理必修1第三章第三節(jié)的內(nèi)容,編排在彈力之后。該節(jié)知識(shí)既是力學(xué)的基礎(chǔ),也是組成整個(gè)高中物理知識(shí)的一塊“基石”,所以這節(jié)內(nèi)容的教學(xué)如何引領(lǐng)學(xué)生自主積極地探究摩擦力產(chǎn)生的條件和影響因素,體驗(yàn)?zāi)Σ亮μ攸c(diǎn)規(guī)律的發(fā)生過(guò)程是本節(jié)課的重點(diǎn),應(yīng)高度重視本節(jié)教學(xué)過(guò)程;由于摩擦力問(wèn)題的復(fù)雜性,且在具體問(wèn)題中又表現(xiàn)出“動(dòng)中有靜,靜中有動(dòng)”,尤其靜摩擦在許多情形下似乎又是“若有若無(wú),方向不定”,因此,對(duì)于初學(xué)者也是有一定難度的。也正是由于教材內(nèi)容的上述特點(diǎn),本節(jié)課又易于激起學(xué)生的求知欲,易于培養(yǎng)學(xué)生的辯證觀點(diǎn),易于錘煉學(xué)生的物理素質(zhì)。要充分用好該節(jié)教材內(nèi)容,深入挖掘知識(shí)間的有機(jī)聯(lián)系,對(duì)學(xué)生開(kāi)展針對(duì)性的思維訓(xùn)練,進(jìn)而提高學(xué)生應(yīng)用物理知識(shí)解決實(shí)際問(wèn)題的能力和創(chuàng)新思維能力。高中物理《課標(biāo)》對(duì)該知識(shí)點(diǎn)的要求是,“通過(guò)實(shí)驗(yàn)認(rèn)識(shí)滑動(dòng)摩擦、靜摩擦的規(guī)律,能用動(dòng)摩擦因數(shù)計(jì)算摩擦力”。其中,對(duì)靜摩擦力規(guī)律的認(rèn)識(shí)應(yīng)該包括最大靜摩擦力。

(一)、復(fù)習(xí)提問(wèn)1、請(qǐng)說(shuō)出功的計(jì)算公式及功的單位2、我們用哪個(gè)物理量表示物體運(yùn)動(dòng)的快慢?(二)、創(chuàng)設(shè)情景,引入新課1、播放多媒體素材,用起重機(jī)和一個(gè)工人搬運(yùn)幾百塊磚比較哪一種方法好?圖中的情景說(shuō)明了什么問(wèn)題?(教師通過(guò)所設(shè)計(jì)的情景,將學(xué)生引入怎樣比較做功快慢,讓學(xué)生發(fā)表自己的看法,初步知道物體做功是有快慢之分的。)(三)、進(jìn)行新課1、比較做功快慢的方法播放多媒體素材并提出問(wèn)題:怎樣比較兩個(gè)人誰(shuí)做功快誰(shuí)做功慢?教師啟發(fā):以前學(xué)習(xí)過(guò)要比較兩物體運(yùn)動(dòng)的快慢,可以先確定路程再比較時(shí)間,也可以先確定時(shí)間再比較路程。在路程和時(shí)間都不同時(shí),通過(guò)計(jì)算速度比較兩物體運(yùn)動(dòng)的快慢。同理,要比較物體做功的快慢可采用什么方法?

探究一:高中階段功的含義是什么?投影:初中九年級(jí)《物理》105頁(yè)學(xué)生思考:①圖中物體的勢(shì)能、動(dòng)能分別如何變化?②物體能量的變化和做功是否存在關(guān)系?學(xué)生:分組討論,得出結(jié)論:如果物體的能量發(fā)生變化時(shí),說(shuō)明有力對(duì)物體做了功。教師:進(jìn)行點(diǎn)評(píng)和小結(jié)(設(shè)計(jì)意圖:對(duì)初中知識(shí)深化理論認(rèn)識(shí),并為以后功能關(guān)系的教學(xué)作準(zhǔn)備)探究二:力對(duì)物體做功的兩個(gè)要素是什么?情景再現(xiàn):找體重相對(duì)懸殊的兩位同學(xué),①A同學(xué)試圖抱起B(yǎng)同學(xué),但沒(méi)成功。②B同學(xué)抱起A同學(xué)在教室內(nèi)勻速走動(dòng)。學(xué)生思考:在①中,A是否對(duì)B做功?在②中,B是否對(duì)A做功?學(xué)生:分析得出做功的兩要素:物體受到力的作用,并且在力的方向上發(fā)生位移.教師:讓學(xué)生分別例舉生活中力對(duì)物體做功和不做功的例子,(設(shè)計(jì)意圖:讓學(xué)生親身參與課堂實(shí)驗(yàn),烘托課堂氣氛,相互協(xié)作增進(jìn)同學(xué)情誼)探究三:如果物體的位移不再力的方向上,那么力是否還對(duì)物體做功?

4,教師重點(diǎn)點(diǎn)撥以下幾個(gè)問(wèn)題⑴廊坊戰(zhàn)役:義和團(tuán)浴血奮戰(zhàn),對(duì)敵人毫不退縮, 其勝利,挫敗了西摩爾聯(lián)軍進(jìn)犯北京的計(jì)劃,沉重打擊了侵略者的氣焰,粉碎了所謂“西方軍隊(duì)無(wú)敵”的神話。這是對(duì)學(xué)生進(jìn)行愛(ài)國(guó)主義的重要素材之一,教師重點(diǎn)點(diǎn)撥突出其情感教育的重要作用。⑵讓學(xué)生(閱讀教材小字和材料,結(jié)合插圖,認(rèn)清八國(guó)聯(lián)軍對(duì)中國(guó)人民犯下的滔天罪行。)并讓學(xué)生分組探討自己的看法,一方面培養(yǎng)學(xué)生的語(yǔ)言表訴能力,另一方面通過(guò)學(xué)生的訴說(shuō)激發(fā)學(xué)生的愛(ài)國(guó)情感,樹(shù)立落后就要挨打的觀念.⑶指導(dǎo)學(xué)生通過(guò)對(duì)條約主要內(nèi)容進(jìn)行了分析,并自然得出結(jié)論:清政府完全成為帝國(guó)主義統(tǒng)治中國(guó)的工具,中國(guó)完全陷入半殖民地半封建社會(huì)。讓學(xué)生逐步學(xué)會(huì)分析和歸納能力(4)進(jìn)行拓展訓(xùn)練出示中國(guó)近代史上列強(qiáng)的大規(guī)模的侵華戰(zhàn)爭(zhēng)和中國(guó)人民的反抗斗爭(zhēng)
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