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人教版高中英語必修3Astronomy the science of the stars說課稿3篇
Step 2 Pre-listeningAfter students finish their discussion, I will show a picture of Newton and ask them: Who is him? What is he famous for? Could you find out some words to describe him? Maybe students will answer that he is genius for his finding of theGravitation, making a great contribution to the progress of human being. At that time I will show another two pictures of Einstein and Hawking, letting students guess who they are and write down their idea about the Gravitation. For I have arranged them to search more information about the gravity before this class, Students have beenfamiliar with the topic and will not be afraid about this abstract conception, which is helpful for their listening.Step 3 While-listeningIn this step, students will be required to listen the material for three times. The first and listening is extensive listening and the second and third listening is intensive listening. In the first time, They are required to listen a material including Part 1 and Part 2 and choose the best summary of the listening text. After they choose the right answer, They also need work in group to explain what is wrong with the others. Then I will make a conclusion that we should pay attention to the first paragraph and last paragraph and some keys to get the main idea. By doing this, their capacity of generalization will have a great improvement.Before the second listening, I will ask students to scan the blank on the power point quickly and ask them to note down some key words .Then ask them to listen to the Part 1again and fill the first column of the chart. Maybe some students just show the ideas of these three scientists an still can’t catch their development of gravity. Therefore, I will ask them to listen to Part 2 again and fill in the rest. After finish the listening, I will give them ten minutes to discuss with their partner. I will also guidethem to improve their answers when they discuss with others.
人教版高中英語必修2Wildlife Protection說課稿3篇
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.
人教版高中英語必修3Festivals around the World說課稿3篇
Teaching plan for Unit 1 book3Good morning, teachers. It’s my great pleasure to be here because I can share my lesson with you and I can learn a lot from it. I’ll begin my lesson from the following four parts， the teaching material, the teaching methods, the studying methods and the teaching procedure.Firstly, let me talk about the teaching material. The content of my lesson is the reading passage festivals and celebrations of Unit 1 Festivals around the world. This passage is about festivals and celebrations. By studying this passage, we’ll enable the students to know that festivals exit everywhere, and many of festivals in different countries celebrate similar ideas. As we all know, the reading passage is the center of each unit. If the Ss can learn it well, it will be helpful to make the Ss learn the rest of this unit.After studying the teaching material, I think the teaching aims are as the followings:1. Knowledge aims:(1) The Ss can master the usage of the important words andexpressions.(2)The Ss can use the __________________ (grammar) in the proper situation.Make students know about the festivals all over the world and the detail of the festivals, such as origin, content, and the date of the holiday festivals.2. Ability aims:(1) Students can talk about festivals and celebrations in English(2) To improve the student’s reading ability, especially their skimming and scanning ability.3. Emotion aims:Make the Ss know about the foreign festivals, and respect other countries’ custom.Next, let’s come to the important points and the difficult points.The important point is how to make the Ss understand the text better and the difficult point is how can they talk about it. secondly， Teaching Methods:1. task-based Language Teaching2. Computer assisted language teaching.3. question-and–answer methodThirdly， Studying Methods:
人教版高中英語必修3The million pound bank note說課稿3篇
在接下來的細讀環(huán)節(jié)，我套用了高考對閱讀理解的考查方式設置了5個問題，分別為三個推理判斷題，一個細節(jié)題和一個主旨大意題。學生需要對文章的內(nèi)容進行分析、歸納、推理、猜測等高級思維活動才能做出正確的回答?！驹O計意圖】這一過程是對學生進行細讀的訓練，培養(yǎng)學生獲取特定信息和挖掘文章深層次信息的能力。第三環(huán)節(jié):Intensive-reading (精讀) 15′第三個環(huán)節(jié)精讀，既是最重要的環(huán)節(jié)，也是突破本課重難點的關鍵。首先，讓學生思考劇本中人物看到百萬英鎊前后的態(tài)度發(fā)生了怎樣的變化。其次，讓學生仔細閱讀文章，找出可以表現(xiàn)人物態(tài)度變化的具體的語言和動作。最后，讓學生總結(jié)人物的態(tài)度發(fā)生變化的根本原因是什么，從而引出Money Talks, 供學生思考。【設計意圖】通過一系列的活動培養(yǎng)學生學習從人物的語言和動作探究人物的心理，使學生進一步體會戲劇語言的魅力，從而對文章背后所反映的社會問題進行思考，也為下一步的討論環(huán)節(jié)做好鋪墊。
人教版高中英語必修5First aid說課稿6篇
In this class, I have 3 teaching aims, that is, knowledge aims, ability aims and emotion aims.1) Knowledge-Teach students new words and expressions, such as temporary, bleed,sprain choke, first aid, fall ill and so on.-Enable students to have a better understanding for some basic knowledge of first aid.2) Ability-Train students’ speaking, reading and writing abilities by different teaching activities, such as skimming, comprehending, team work, role play, retelling and writing.-Develop students’ reading strategy on how to move general idea to specific information.3) Emotion-Promote students’ awareness of giving first aid.- Cultivate students’ creativities.Then let’s come to my teaching methods and activities.III. Teaching methods and activities:To achieve different teaching aims, various kinds of teaching methods and activities will be adopted throughout this period, such as TBL (task-based learning), skimming, team work, brainstorm and others, which can offer students opportunities to fulfill tasks in which they can use language to achieve a specific outcome.IV. Teaching aids:Computer and blackboardV. Teaching important points:1) Make students have a clear mind for the structure of the text.2) Help students understand the theme of the text.VI. Teaching difficulties:1) So many new words may affect students’ understanding.2) How to get students to know about the functions of the skin and thecauses, characteristics and treatments for different degree burns,and the knowledge about giving first aid. VII. Blackboard design:
人教版高中英語必修5Life in the Future說課稿5篇
Good afternoon, everyone. It’s my great pleasure to be here sharing my lesson with you. The content of my lesson is Senior English for China Book5 Unit 3 Life in the Future. I’ll be ready to begin this lesson from six parts: Analysis of the teaching material, Analysis of the students, Teaching aims and important and difficult points, Teaching methods and aids, Teaching procedures, and Blackboard design. First, let me talk about the teaching material.Part 1 Analysis of the Teaching Material:This unit is about what human beings’ life will be like in about one thousand years. By studying of this unit, we’ll Enable the students to know the changes in humans’ life and some new inventions bringing about the change and develop the interest in science. This lesson plays an important part in the English teaching in this unit. This is an important lesson in Book Five. From this lesson, it starts asking the Ss to grasp contents of each passage. Therefore, this lesson is in the important position of the teaching material. If the Ss can learn it well, it will be helpful to make the Ss learn the rest of this unit.Part 2 Analysis of the SsAs Senior2 Ss, they are at different levels of English fluency, some of them have lost interest in English. So during the lesson, I arrange a variety of activities to let all of them join in to attract their interest and let them be confident and taste the joy of success.
人教版新課標高中物理必修1摩擦力說課稿2篇
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)知識既是力學的基礎，也是組成整個高中物理知識的一塊“基石”，所以這節(jié)內(nèi)容的教學如何引領學生自主積極地探究摩擦力產(chǎn)生的條件和影響因素，體驗摩擦力特點規(guī)律的發(fā)生過程是本節(jié)課的重點，應高度重視本節(jié)教學過程；由于摩擦力問題的復雜性，且在具體問題中又表現(xiàn)出“動中有靜，靜中有動”，尤其靜摩擦在許多情形下似乎又是“若有若無，方向不定”，因此，對于初學者也是有一定難度的。也正是由于教材內(nèi)容的上述特點，本節(jié)課又易于激起學生的求知欲，易于培養(yǎng)學生的辯證觀點，易于錘煉學生的物理素質(zhì)。要充分用好該節(jié)教材內(nèi)容，深入挖掘知識間的有機聯(lián)系，對學生開展針對性的思維訓練，進而提高學生應用物理知識解決實際問題的能力和創(chuàng)新思維能力。高中物理《課標》對該知識點的要求是，“通過實驗認識滑動摩擦、靜摩擦的規(guī)律，能用動摩擦因數(shù)計算摩擦力”。其中，對靜摩擦力規(guī)律的認識應該包括最大靜摩擦力。
人教版高中語文必修1《紀念劉和珍君》說課稿3篇
1.說教材《記念劉和珍君》是魯迅先生用飽醮著熱淚，用悲憤的筆調(diào)寫下的一篇感人至深的散文，既有對愛國青年沉痛的悼念，又有對反動派憤怒的控訴，也有對覺醒的國民的吶喊?！队浤顒⒑驼渚肥歉咧姓Z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。對學生明辨是非，領悟時代精神和人生意義，有著重要的作用。新課標強調(diào)了要全面提升高中學生的語文素養(yǎng)，初步形成正確的世界觀、人生觀、價值觀，并學會收集、判斷、處理信息，具有人文素養(yǎng)、創(chuàng)新精神與實踐能力。同時，《記念劉和珍君》感情真摯，感悟深刻，具有典型人文性。結(jié)合本單元教學目標，確立教學目標如下。
人教版高中語文必修1《沁園春·長沙》說課稿3篇
4、學習全詞：（1）背景介紹，讓學生看課文中的年代，然后讓學生回憶1925年的毛澤東的情況，老師適當提示，讓學生了解其背景。（出示幻燈片）(2)學生自由朗讀，結(jié)合注釋和背景理解詩詞。(3)師生共同理解全詞①先讓學生齊讀前三句，思考正確的語序，并用正常的語序解釋。②品味第三到第十句，這里是教學的一個重點，要讓學生先讀，再理解，在此基礎上訓練學生的想象能力。③分析上闕中的最后三句。④小結(jié)上闕。提出了一個問題“誰主沉浮”讓學生在文中找內(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“誰主沉浮”的問題，突出本文主旨5、描繪詩詞形象：學生用自己的語言把上闕的內(nèi)容生動地描繪出來。6、欣賞學生優(yōu)秀作品。（根據(jù)時間具體而定，也可以作為課后作業(yè)）
人教版高中語文必修2《氓》說課稿3篇
四、教學方法和學法。課前學生搜集有關《詩經(jīng)》的資料必不可少。另外，時隔數(shù)千年，年代久遠，文字的障礙很大，然而，過分糾纏于文字的疏通會破壞詩歌的“氣”，喪失詩歌的“神”，所以在學習時，應舍去條分縷析的理論評價，指導學生結(jié)合注釋疏通文字，然后引領他們經(jīng)由文字再現(xiàn)形象和事件，經(jīng)由形象和事件領略情感，感受其中濃濃的詩情。誦讀的環(huán)節(jié)是重要的，配以二胡獨奏《長相思》，營造意境，學生沉浸在音樂營造的意境中反復吟詠，讀出節(jié)奏，讀出音調(diào)，讀出感情，細細體味，讓或優(yōu)或喜的情愫縈繞心間，我們就觸到了先民的靈魂。比興手法為《詩經(jīng)》獨創(chuàng)，重章疊句同樣別致而新鮮，教學過程中結(jié)合具體語境讓學生自己去發(fā)現(xiàn)并進行討論，不搞枯燥的知識傳授。還引入講故事、改寫兩種活潑的學習形式，從而達到加深理解的目的。
人教版高中語文必修2《蘭亭集序》說課稿3篇
（二）分析課文，理清思路第1、2段為第一部分，主要是敘事、寫景，先敘述集會的時間、地點，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“暢敘幽情”、盡興盡歡的絕好處所。這些描寫都富有詩情畫意，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，作者由美景妙時引發(fā)出樂與憂、生與死的感慨。他認為人生的快樂是有極限的，待快樂得到滿足時，就會感覺興味索然。往事轉(zhuǎn)眼間便成為歷史，人到了生命的盡頭就會死亡。作者由“一死生為虛誕，齊彭殤為妄作”的認識，產(chǎn)生了一種珍惜時間、眷戀生活、熱愛文明的思考。雖然文中的壽夭、生死不能自由決定，從而有些傷感，但作者仍然認識到盛衰、生死是必然的。人生無常，時不我待，故著文留傳后世，以承襲前人，啟示來者。
人教版高中語文必修1《雨巷》說課稿3篇
一.教材理解教材地位與作用：本單元“閱讀與鑒賞”部分，本單元要求學生能在了解詩歌創(chuàng)作的時代背景的情況下通過反復誦讀詩歌，把握其中豐富的意象，領悟詩歌獨特的意境和詩人所要表達的情感?！队晗铩肥乾F(xiàn)代派大師戴望舒的成名作和前期的代表作,他曾因此而贏得了“雨巷詩人”的雅號。本單元以《雨巷》為例子給學生展示了象征主義詩歌的特點，《雨巷》運用了象征性的抒情手法。詩中那狹窄陰沉的雨巷，在雨巷中徘徊的獨行者，以及那個像丁香一樣結(jié)著愁怨的姑娘，都是象征性的意象。這些意象又共同構(gòu)成了一種象征性的意境，含蓄地暗示出作者即迷惘感傷又有期待的情懷，并給人一種朦朧而又幽深的美感。富于音樂性是《雨巷》的另一個突出的藝術(shù)特色。詩中運用了復沓、疊句、重唱等手法，造成了回環(huán)往復的旋律和宛轉(zhuǎn)悅耳的樂感。因此我把本課的教學重點和難點確定為：教學重點：通過反復誦讀，領略詩歌的音樂美以及分析其成因教學難點：分析意象以及其象征意義初步掌握鑒賞詩歌的方法
人教版高中語文必修2《赤壁賦》說課稿3篇
[教學反思]人教版高中語文必修二第三單元安排了《蘭亭集序》《赤壁賦》《游褒禪山記》三篇古代山水游記散文，它們借游賞之事，探索生命的意義、治學的道理。師者，所以傳道、授業(yè)、解惑也。高中的教材選用的都是歷史經(jīng)典名篇，每一篇都閃爍著儒道釋等百家光輝的思想。編者要老師傳道的意圖很明顯。即非如此，看著這些影響歷代、影響世界的如日月之耀眼光華的偉大思想就躺在我們的教科書里，又如何能不講呢？所以，我將本課的教學重難點擬定為：幫助學生建立積極的生死觀，掌握多角度看問題的正確的思想方法。當然，也讓學生領會了融寫景、抒情、說理于一爐的大家手法。整堂課各教學環(huán)節(jié)，環(huán)環(huán)相扣，過渡自然，讀、思、議、寫訓練到位，而且全部圍繞“生死觀”展開，如一篇形散神不散的散文。
人教版高中語文必修3《林黛玉進賈府》說課稿5篇
【教學目標】我設置的本課的教學目標有三個:1、知識與技能(1)了解曹雪芹及《紅樓夢》(2)學習通過一個人物的行蹤、所見所聞,介紹典型環(huán)境,認識封建貴族階級豪奢極恥的生活以及森嚴的等級、禮儀制度(3)分析小說人物出場的描寫藝術(shù)，培養(yǎng)學生分析小說人物形象的能力。(4)一葉落而知秋”，通過對“林黛玉進賈府”這一故事情節(jié)的把握是否能引發(fā)對《紅樓夢》的認知興趣，并找到一個突破口，有針對性地進行自主探究，進而進行個性化解讀。（5）整體認知小說,認識小說悲劇的必然性和思想價值.2、過程與方法(1)用直觀演示和歸納探究法分析文章要點。(2)用討論探究法體驗作者對文中人物的情感態(tài)度。3、情感態(tài)度價值觀(1)正確理解《紅樓夢》的思想內(nèi)涵,培養(yǎng)學生熱愛祖國傳統(tǒng)文化的思想感情。(2)認識封建大家族的腐朽沒落,理解賈寶玉追求個性自由反封建的精神。
人教版高中語文必修3《馬嵬（其二）》說課稿
生2：頷聯(lián)的意思是只聽到禁衛(wèi)軍中傳來夜間巡邏的梆子聲，不再向?qū)m中那樣安逸地聽到有雞人打鳴報時的聲音了。生3：頸聯(lián)的意思是說事變發(fā)生那天軍隊發(fā)生嘩變停留不前，但當年唐玄宗以為自己可以和貴妃天天在一起，對天上的牽牛和織女一年一度的會見還加以嘲笑呢。生4：尾聯(lián)的含義是為什么唐玄宗當了四十五年的皇帝，還不如普通百姓夫妻恩愛，長相廝守。師：好的。請大家再齊讀一遍詩文，做到人人都能疏通詩的含義。學生再次齊讀。第三環(huán)節(jié)：專項探究師：白居易曾說：“文章合為時而著，歌詩合為事而作?！边@首詩就是作者途經(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，就是通過標題和詩文，弄清詩中的歷史事件。請同學們找出詩中哪些詩句描述了這一事件？
人教版高中語文必修3《動物游戲之謎》說課稿2篇
一、導入新課人類社會越來越現(xiàn)代化，新科學技術(shù)日新月異，令人目不暇接，稱之到了“知識爆炸”的時代也毫不為過。由此而來的是生活的快節(jié)奏，學習和工作的競爭也越來越激烈。這種競爭一直波及到了兒童，加之中國幾千年來形成的望子成龍的傳統(tǒng)觀念，使作父母的把一切希望都寄托在孩子身上，實現(xiàn)自己未能實現(xiàn)的理想。祖孫三代4、2、1的局面，使12只眼睛都盯在了孩子身上，真是走路怕摔著，吃飯怕噎著，干活怕累著，要星星不敢摘月亮，要吃什么跑遍全城也要買來。這種過分保護、溺愛及過早地灌輸知識會得到什么結(jié)果呢？樂觀者說孩子越來越聰明，越來越早熟，將來能更好適應現(xiàn)代化的要求；悲觀者則認為豆芽菜式的孩子將來經(jīng)不起風浪，小皇帝太多了很難凝聚成統(tǒng)一力量，將來誰去當兵，誰去干那些艱苦創(chuàng)業(yè)性工作……。對孩子本身來說，是幸福還是……在此不想多發(fā)議論，還是讓我們來看看動物世界的孩子們吧，也許會得到某種啟迪。
人教版高中語文必修3《師說》說課稿3篇
一、設計理念教學設計堅持少講多學、以學為主的教學理念，重視學培養(yǎng)生的學習興趣，要充分調(diào)動學生學習的積極性和主動性，充分發(fā)揮學生的主體性。教師要以組織者、引導者、合作者的角色參與到教學活動中去。力圖通過導學案努力培養(yǎng)學生的自學習慣和自學能力。二、教材分析與處理1、教材的地位與作用：必修三第三單元所選的文言文都是古代的議論性散文。本課是“唐宋八大家”之首、中唐古文運動的倡導者韓愈的力作，是唐宋散文中的名篇，具有很強的代表性。通過這篇自讀課的學習，能使學生了解唐宋散文的風貌，更能使學生進一步積累文言文基礎知識，提高學生的文言文閱讀欣賞能力，從而提升學生的文言文自讀能力。2、教學目標：《高中語文課程標準》要求高中學生能閱讀淺易文言文，能借助注釋和工具書，理解詞句含義，讀懂文章內(nèi)容；了解并梳理常見的文言實詞、文言虛詞、文言句式的意義或用法，注重在閱讀實踐中舉一反三；對文章有一定的分析欣賞能力。高一的學生對于文言文的知識還在積累階段，應該注重基礎知識的積累和一定量的誦讀。對此，我將教學目標確定為：
人教版高中生物必修2伴性遺傳說課稿
（1觀察圖解，色盲基因在性別間是如何傳遞的呢？（女--女、女--男、男--女）（2）為什么不能由男性傳給男性？（色盲基因是在X染色體上，因此色盲基因是隨X染色體的傳遞而傳遞。）（3）男性的色盲基因怎樣才能傳給男性呢？（通過女兒，傳給外孫即交叉遺傳）（4）從圖解看色盲在男女中的發(fā)病情況怎樣？（男性多于女性）（5）從社會調(diào)查也是這樣，你是否能從基因和染色體的角度加以解釋？（提示：女性染色體的構(gòu)成，結(jié)合基因位置及顯隱性進行分析）歸納特點：歸納出色盲基因遺傳的特點并擴展到X染色體隱性遺傳的特點上。色盲基因遺傳（X隱性遺傳）的特點：（1）男患者多于女患者（2）交叉遺傳（3）女病兒子必病，男正女兒必正等。問題探討：利用“遺傳圖解”結(jié)合“問題鏈”繼續(xù)探討，拓展到抗維生素D即X 染色體顯性遺傳的特點。（6）色盲基因在X染色體上屬隱性基因，子代表現(xiàn)男多于女，對應的正常色覺基因則屬于X顯性基因，子代表現(xiàn)應如何？（女多于男）
人教版高中地理必修2煤城焦作出路何在說課稿
分析過焦作市的地理概況和產(chǎn)業(yè)優(yōu)勢后，就需要針對由于資源枯竭所帶來的問題提出合理化的建議。既然是談經(jīng)濟轉(zhuǎn)型，就應該將話題的范圍明確在這一領域內(nèi)。通過材料3的相關內(nèi)容，我們了解到焦作市需要在產(chǎn)業(yè)結(jié)構(gòu)調(diào)整、培育新的優(yōu)勢產(chǎn)業(yè)、增強綜合競爭力等三個整改方針上下功夫。因而引導學生針對優(yōu)勢與不足提出建議，以三個整改方針為基準，衡量建議的可行性是鍛煉學生解決此類問題的有效途徑。在此我將教會學生的是解決問題方法而非案例的內(nèi)容，正所謂“授之以魚，不如授之以漁”。接下來針對學生的建議和教材資料分析所羅列的10點整改思路，由學生自由發(fā)言提出看法，通過教師的指導和學生的討論，進而確定經(jīng)濟轉(zhuǎn)型建議的具體方案。最后注意將建議與產(chǎn)業(yè)優(yōu)勢相對照，看建議是否都是圍繞著產(chǎn)業(yè)優(yōu)勢而提出的，這樣做會加深學生的印象，通過建議和優(yōu)勢的對應關系，將不難找出此類問題的解題思路。
人教版新課標高中物理必修1彈力說課稿3篇
基于以上分析，為使本堂課圍繞重點、突破難點，同時讓學生在課堂教學中能力得到提高，我設計如下教學過程。（一）創(chuàng)設情景認識形變由同學們已有的形變知識入手，引入新課。教師演示：①彈簧的壓縮形變；②彈簧的拉伸形變③視頻播放：竹竿形變、鋼絲的扭轉(zhuǎn)形變。得出形變的概念及各類形變。[設計意圖：我從生活情景中引入新課，是為了激發(fā)學生的好奇心，為學生學習重點和難點內(nèi)容作鋪墊。]設問：摩天大樓在風的吹拂下會不會擺動，發(fā)生形變嗎？演示微小形變放大實驗：由于這種形變不容易觀察，會使學生產(chǎn)生疑問：到底有沒有發(fā)生形變？解決的辦法是微小形變的演示實驗。為什么光點會往下移？讓學生帶著問題思考后得出結(jié)論：是由于桌面發(fā)生了形變，但是形變不明顯。為后面解決壓力和支持力都是彈力做好鋪墊。[設計意圖：使學生知道“放大”是一種科學探究的方法。]
