
學(xué)法指導(dǎo):高一學(xué)生對文言文閱讀已具備了一些基礎(chǔ)知識和積累,但對如何學(xué)習(xí)文言文,還是一個新課題,因此教師應(yīng)引導(dǎo)學(xué)生掌握學(xué)習(xí)方法,運用已有的知識框架同化新信息,建立新的智能,逐步走向獨立學(xué)習(xí)的境界。一、引導(dǎo)學(xué)生利用課文注釋,使用工具書自己翻譯,必要時教師進行點撥、解難,培養(yǎng)自學(xué)能力。二、告訴學(xué)生翻譯文言文要遵循的原則。三、調(diào)動學(xué)生思考、討論、交流的積極性,教師適時點撥,培養(yǎng)學(xué)生發(fā)現(xiàn)問題、解決問題的能力。四、提示學(xué)生反復(fù)誦讀課文,體會文章所闡述的道理。五、鼓勵學(xué)生及時歸納學(xué)習(xí)文言文的方法,注意積累文言文知識。教學(xué)程序:教學(xué)本課可安排2課時。第一課時:1、導(dǎo)入新課:首先給學(xué)生介紹毛澤東的七絕詩《為李進同志題所攝廬山仙人洞照》:“暮色蒼茫看勁松,亂云飛渡仍從容。天生一個仙人洞,無限風(fēng)光在險峰?!睂W(xué)生通過誦讀領(lǐng)會了“無限風(fēng)光在險峰”一句的含義。隨后因勢利導(dǎo),引出課題,指出今天我們要學(xué)習(xí)的王安石的《游褒禪山記》,就含有類似的深邃哲理。

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(dāng)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(dāng)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(xué)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(biāo)題和詩文,弄清詩中的歷史事件。請同學(xué)們找出詩中哪些詩句描述了這一事件?

說教材A.教材簡析《琵琶行(并序)》是人教版《普通高中課程標(biāo)準(zhǔn)實驗教科書語文》必修3第二單元的一篇講讀課文。本單元學(xué)習(xí)的是唐代詩歌,共七首詩。《琵琶行(并序)》是唐代著名現(xiàn)實主義詩人白居易寫的一首歌行體長篇敘事詩,是我國古代敘事詩和音樂詩中的“千古絕喝”。詩歌主題鮮明、人物形象生動,抒情真切細膩,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中學(xué)語文教學(xué)大綱》明確要求我們:在閱讀教學(xué)過程中要引導(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,我制定本課的教學(xué)目標(biāo)是:1.知識目標(biāo):了解文學(xué)常識;積累重點文言實詞;品味主旨句“同是天涯淪落人,相逢何必曾相識”的內(nèi)涵;感知作者把音樂描寫與聽者、演奏者的感情融為一體的寫作特點。

《勸學(xué)》是普通高中課程標(biāo)準(zhǔn)試驗教科書語文必修三第三單元的重點篇目,該文集中反映著名思想家荀子在學(xué)習(xí)問題上的觀點和精彩斐然的論證藝術(shù)。該單元所選課文都是古代的議論性散文。通過本單元的學(xué)習(xí)在于讓學(xué)生感受我國傳統(tǒng)文化的精神,掌握基礎(chǔ)的文言語法知識,學(xué)習(xí)如何清晰有力的表達自己的思想和見解。本文安排在單元的第一篇,如何指導(dǎo)學(xué)生學(xué)好這篇課文,是實現(xiàn)“授之以漁”,樹立學(xué)生學(xué)好文言文的信心,掌握文言學(xué)習(xí)方法的關(guān)鍵。根據(jù)新課標(biāo)倡導(dǎo)從“知識與能力”、“過程與方法”、“情感態(tài)度與價值觀”三方面出發(fā)設(shè)計課程目標(biāo)的要求和高一的學(xué)生對于文言文的知識還在積累的階段,應(yīng)該注重基礎(chǔ)知識的積累和一定量的誦讀的實際情況。我擬確定以下教學(xué)目標(biāo):1,了解荀子論述學(xué)習(xí)的思想,明確學(xué)習(xí)要靠積累、堅持不懈、專心致志的道理。2,掌握積累文言實詞、虛詞,活用、古今異議等現(xiàn)象和固定句式。

一、設(shè)計理念教學(xué)設(shè)計堅持少講多學(xué)、以學(xué)為主的教學(xué)理念,重視學(xué)培養(yǎng)生的學(xué)習(xí)興趣,要充分調(diào)動學(xué)生學(xué)習(xí)的積極性和主動性,充分發(fā)揮學(xué)生的主體性。教師要以組織者、引導(dǎo)者、合作者的角色參與到教學(xué)活動中去。力圖通過導(dǎo)學(xué)案努力培養(yǎng)學(xué)生的自學(xué)習(xí)慣和自學(xué)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(dǎo)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(xué)習(xí),能使學(xué)生了解唐宋散文的風(fēng)貌,更能使學(xué)生進一步積累文言文基礎(chǔ)知識,提高學(xué)生的文言文閱讀欣賞能力,從而提升學(xué)生的文言文自讀能力。2、教學(xué)目標(biāo):《高中語文課程標(biāo)準(zhǔn)》要求高中學(xué)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(xué)生對于文言文的知識還在積累階段,應(yīng)該注重基礎(chǔ)知識的積累和一定量的誦讀。對此,我將教學(xué)目標(biāo)確定為:

(1)“問君西游何時還……使人聽此凋朱顏?!痹婎}下未注明送何人入蜀,所以這里的“問君”無妨假定實有其人,可以讀得親切一些。將行而問“何時還”,已有不可行之意,重音要落在“不可攀”三字上,當(dāng)用勸說的語氣讀。以下四句借鳥聲渲染旅途中悲涼凄清的氛圍,讀時要放低聲調(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……胡為乎來哉!”仍是說不可行,但內(nèi)容加深了一層,因為說的是蜀道的險惡。前四句不是純客觀的描寫,讀時須設(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,要使聽者感到驚心動魄。讀后可作稍長停頓,再用“其險也如此”緩緩收住。末句是詩人借用蜀人的口氣,對歷險而來的游者深表嘆息——“胡為乎來哉”不是詢問,當(dāng)用降調(diào)讀,暗含“何苦而來”之意。

一、說教材《開辟新航路》是高中《歷史·必修二》第5課的內(nèi)容。從三個方面向?qū)W生介紹了歐洲人開辟新航路的歷史:即新航路開辟的原因和條件、新航路開辟經(jīng)過以及影響。前4課內(nèi)容介紹了古代中國經(jīng)濟的基本結(jié)構(gòu)與特點,從第5課開始學(xué)習(xí)資本主義世界市場的形成和發(fā)展。本課內(nèi)容相當(dāng)重要,上承古代中國,下啟近代世界。新航路的開辟,打破了世界相對隔絕的狀態(tài),世界真正開始融合為一個整體。從此,以西歐為中心的世界市場的雛形開始出現(xiàn)。隨后的殖民擴張,世界市場拓展;第一次工業(yè)革命,世界市場基本形成;第二次工業(yè)革命,世界市場發(fā)展。二、說目標(biāo)1、課程標(biāo)準(zhǔn)概述迪亞士、哥倫布開辟新航路的史實,認識地理大發(fā)現(xiàn)對世界市場形成的意義。2、三維目標(biāo)①知識與能力:掌握新航路開辟的原因、經(jīng)過、影響。②過程與方法:引導(dǎo)學(xué)生分析原因及影響,培養(yǎng)學(xué)生分析和歸納問題的能力。③情感態(tài)度與價值觀:A、通過對新航路開辟過程的學(xué)習(xí),使學(xué)生感受和學(xué)習(xí)探險家們勇于進取的開拓精神。B、通過學(xué)習(xí)新航路開辟的影響,使學(xué)生認識新航路開辟促進了人類社會的整體發(fā)展。

Step 7 Language points 1.Vocabulary (1) go through (2) set down (3) a series of (4) on purpose (5) in order to (6)at dusk (7)entirely (8)face to face 2.Important sentences (1)…I’ve grown so crazy about everything to do with nature. (2)There was a time when … (3)I stayed awake on purpose until … (4)It was the first time … that I’d seen the night … (5)It’s no pleasure looking through … Purpose: 1.Master the required vocabulary and sentence structures. 2.Use them freely. Step 8 Consolidation 1.Find out the topic sentences 2.Retell the text according to the topic sentences Purpose: I want to know if my students understand the text. Step 9 Discussion Imagine you have to go into hiding like Anne and her family, what would you miss most? Giveyour reasons. Purpose: Train Ss’ oral English ability. Step 10 Homework Write an article on Friends. Purpose: 1. Improve the Ss’ writing ability. 2 Train the Ss’ ability of self—teaching and looking up information by themselves. Part 5 Blackboard design(說板書設(shè)計)Unit 1 Friendship Reading Anne’s Best Friend 1.Main idea of each paragraph: Para. 1 Anne made her diary her best friend. Para .2 Anne wrote her feelings in her diary. Para .3 Anne missed nature. Para.4 Anne saw the night face to face Para.5 Anne wanted to experience nature outdoors. 2.Listening: Exx.1 P3 3.Discussion: Exx.3 P3 Purpose: 1.Make Ss familiar with the passage 2.Make the design inductive, instructive and artistic.

Purpose of my design:To ask the students to do these two tasks will make the Ss predict the story of this passage. As a result, it will deepen Ss’ memory of this story because they will have their own understanding of this story.Step 3. While-readingTask 1. (Individual work _____min)Skimming: ask students to skim the text and the main ideas of each paragraph in this passage. Please read it quickly and then match the sentences with the letters.Task 2. (Individual work _____min)Scanning: read the text quickly and decide the whether the following statements are true or false and give reasons.Task 3. (Pair work _____min)Listen to the tape and fill in the banks. Then read the paragraph with expression to your partner.Task4 (individual work min)Listen to the tape again and write down the main idea in one sentence.Purpose of my design: Enable students to understand the given material better by using different reading skills. And proper competition can arouse the Ss’ interest in English learning. “Task-based” teaching method is used here todevelop the Ss’ ability of communication and also their ability of co-operation will be well trainedStep 4. Post-readingTask 1. (Individual work, pair work, group work, class work; _____min)Discussion (group of 4):1. If you were Hippomenes, would you run against Atlanta?2. Do you think Hippomenes deserved to win the race? Why or why not?Step 5. HomeworkPlease read the story again carefully after class and imagine: What will happen during the race between Hippomenes and Atlanta? Who do you think will win the race? Do you think Atlanta would marry Hippomenes? Write an end for the story with thses questions.Purpose of my design: Homework is so important and necessary for to master the knowledge they learned after class. It will check whether the Ss achieve the teaching aims.Part 5 Blackboard design

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.

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.

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:

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(shè)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(xué)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(shè)計意圖】這一過程是對學(xué)生進行細讀的訓(xùn)練,培養(yǎng)學(xué)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(guān)鍵。首先,讓學(xué)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(xué)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(xué)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(xué)生思考?!驹O(shè)計意圖】通過一系列的活動培養(yǎng)學(xué)生學(xué)習(xí)從人物的語言和動作探究人物的心理,使學(xué)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。

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:

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.

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(yīng)該將話題的范圍明確在這一領(lǐng)域內(nèi)。通過材料3的相關(guān)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(dǎo)學(xué)生針對優(yōu)勢與不足提出建議,以三個整改方針為基準(zhǔn),衡量建議的可行性是鍛煉學(xué)生解決此類問題的有效途徑。在此我將教會學(xué)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(xué)生的建議和教材資料分析所羅列的10點整改思路,由學(xué)生自由發(fā)言提出看法,通過教師的指導(dǎo)和學(xué)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(xué)生的印象,通過建議和優(yōu)勢的對應(yīng)關(guān)系,將不難找出此類問題的解題思路。

一、 教材分析與學(xué)情分析教材分析人民教育出版社普通高中課程標(biāo)準(zhǔn)實驗教科書必修2第七章第九節(jié)。本節(jié)內(nèi)容安排在學(xué)習(xí)機械能守恒定律之后的目的,是為了使學(xué)生在理論上對機械能守恒定律有所了解的基礎(chǔ)上,通過實驗測量及對實驗數(shù)據(jù)的分析處理,對機械能守恒定律及條件有深刻的認識。學(xué)情分析知識層面:學(xué)生已經(jīng)掌握了動能、重力勢能等概念以及動能定理、機械能守恒定律等定理、定律;知道功是能量轉(zhuǎn)換的量度以及機械能守恒的條件。能力層面:學(xué)生已具備一定的實驗操作技能,會用打點計時器以及直尺等實驗儀器。具備一定的數(shù)據(jù)處理能力。二、教學(xué)目標(biāo)與重點、難點教學(xué)目標(biāo)知識與技能:1、會用打點計時器打下的紙帶計算物體運動的速度。2、掌握驗證機械能守恒定律的實驗原理。

二、應(yīng)用生長調(diào)節(jié)劑的注意事項1、效果不穩(wěn)定。2、使用時期。3、使用濃度和方法。4、使用生長調(diào)節(jié)劑僅是葡萄栽培管理的輔助手段,不能盲目孤立地依賴生長調(diào)節(jié)劑。生2:我們小組查的資料是關(guān)于小麥?zhǔn)褂蒙L調(diào)節(jié)劑。小麥應(yīng)用植物生長調(diào)節(jié)劑,可以調(diào)節(jié)植株的生長發(fā)育,具有控旺促壯、增強抗逆性、增加粒重、提高產(chǎn)量并有利于優(yōu)質(zhì)、早熟等多重效果。生3:我找了一篇生長調(diào)節(jié)劑對矮牽牛大型穴盤生產(chǎn)。師:上面三位同學(xué)利用課下的時間,在網(wǎng)上查的三段文字都相當(dāng)?shù)牟诲e,大家可以從中學(xué)到一些書本上沒有的知識,請大家結(jié)合剛剛?cè)煌瑢W(xué)的三段文字以及自己平時所積累的知識,討論以下幾個問題。師:你知道哪些農(nóng)產(chǎn)品在生產(chǎn)過程中使用了植物生長調(diào)節(jié)劑?師:哪些水果在上市前有可能使用了乙烯利?師:生產(chǎn)過程中施用植物生長調(diào)節(jié)劑,會不會影響農(nóng)產(chǎn)品的品質(zhì)?師:如果你是水果銷售員,面對半青不熟的水果,你認為應(yīng)當(dāng)使用乙烯利催熟嗎?作為一個消費者,你又怎么看?

(四)、活動交流,體驗科學(xué)通過資料分析討論以下三個問題:1、你知道愛滋病的傳播途徑嗎?2、如何預(yù)防愛滋?。?、我們應(yīng)如何對待愛滋病患者?面對艾滋病我們能做些什么?從而進入情感態(tài)度的教育。除此之外,我還設(shè)計一個開放性的作業(yè)“向全社會為關(guān)注艾滋病設(shè)計一個宣傳廣告”(形式不限,漫畫、板書、倡議書等),讓學(xué)生把愛心付諸于實際行動。在此基礎(chǔ)上引出“免疫學(xué)的應(yīng)用”從免疫預(yù)防、免疫治療、器官移植三個方面講述,讓學(xué)生充分體驗到知識和社會生活的緊密聯(lián)系,讓他們不在感到科學(xué)是那么的遙遠,而是可愛的有用的。通過交流,讓同學(xué)們體會到合作的魅力和重要性,進一步培養(yǎng)合作意識和合作能力。最后我設(shè)計一個資料搜集,讓同學(xué)們選一個感興趣的主題利用電腦在網(wǎng)上搜集有關(guān)資料。主題:1、你知道世界艾滋病日嗎?歷年的主題是什么?開展世界艾滋病運動有什么意義?

d.某物體沿直線向東運動,原來的速度是5m/s,2s后速度減小到3m/s,求2s內(nèi)物體速度變化。④如何探究物體作勻速圓周運動時,在Δt時間內(nèi)的速度變化?分析:有了同一直線上速度變化的鋪墊后,討論物體做勻速圓周運動速度的變化就比較自然了,為了給向心加速度方向的學(xué)習(xí)打好基礎(chǔ),可以通過小組協(xié)作,進一步完成下列思考題,使同學(xué)們認識到:時間間隔起短,速度變化的方向起接近半徑方向。(多媒體屏幕投影)a.物體沿半徑為1m的軌道做勻速圓周運動,線速度大小為,求1s內(nèi)物體速度變化并畫出1s內(nèi)速度變化的示意圖。b.分別求出上題中物體在0.5s、0.25s內(nèi)速度變化并畫出相應(yīng)的示意圖。由于沒有辦法直接利用實驗來驗證速度變化的方向,所以,我們采用提供思考題的方法,引導(dǎo)同學(xué)在合作學(xué)習(xí)、自主探究中完成。有了速度變化的研究為鋪墊,加速度的方向問題就迎刃而解了。
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