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人教版高中數(shù)學(xué)選擇性必修二等差數(shù)列的前n項(xiàng)和公式（2）教學(xué)設(shè)計(jì)
課前小測(cè)1．思考辨析(1)若Sn為等差數(shù)列{an}的前n項(xiàng)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(xiàng)之和最大．( )(3)在等差數(shù)列中，Sn是其前n項(xiàng)和，則有S2n－1＝(2n－1)an.( )[答案] (1)√ (2)√ (3)√2．在項(xiàng)數(shù)為2n＋1的等差數(shù)列中，所有奇數(shù)項(xiàng)的和為165，所有偶數(shù)項(xiàng)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(xiàng)．]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(xiàng)公式是an＝2n－48，則Sn取得最小值時(shí)，n為_(kāi)_______.23或24 [由an≤0即2n－48≤0得n≤24.∴所有負(fù)項(xiàng)的和最小，即n＝23或24.]二、典例解析例8.某校新建一個(gè)報(bào)告廳，要求容納800個(gè)座位，報(bào)告廳共有20排座位，從第2排起后一排都比前一排多兩個(gè)座位. 問(wèn)第1排應(yīng)安排多少個(gè)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(xiàng)和為S_n。
新人教版高中英語(yǔ)必修3Unit 2 Morals and Virtues-Listening &Speaking＆Talking教學(xué)設(shè)計(jì)
Example:One day, a poor boy who was trying to pay his way through school by sending newspapers door to door found that he only had one dime(一角）left. He was so hungry that he decided to beg for a meal at the next house.However, he lost his nerve when a lovely young woman opened the door. Instead of a meal he asked for a drink of water. She thought he looked hungry so she brought him a large glass of milk. He drank it slowly, and then asked, “How much do I owe you?” “You don’t owe me anything,” she replied, “Mother has taught me never to accept pay for a kindness.” “Then I thank you from the bottom of my heart.” With these words, Howard Kelly left that house.Years later the woman became badly ill and was finally sent to the hospital in a big city. Dr. Howard Kelly, now famous, was called in. When he heard the name of the town she came from, a strange light filled his eyes. Dressed in his doctor’s clothes, Dr. Kelly went into her room and recognized her at once. From that day on, he gave special attention to her, and decided to do his best to save her life.At last the woman was saved. Dr. Kelly asked the business office to pass the final bill to him. He looked at it and then wrote something on the side. The bill was sent to the woman’s room. She was afraid to open it because she was sure that it would take the rest of her life to pay for it off. Finally she looked, and the note on the side of the bill caught her attention. She read these words: “Paid in full with a glass of milk, Dr. Howard Kelly.” Tear of joy flooded her eyes.
人教版高中政治必修2本質(zhì)是人民當(dāng)家做主說(shuō)課稿
環(huán)節(jié)三案例分析突出難點(diǎn)這一環(huán)節(jié)，我將用多媒體展示我國(guó)反腐行動(dòng)，將一個(gè)個(gè)貪污腐敗者給予法律制裁的案例和東突分子分裂活動(dòng)的例子，來(lái)得出我國(guó)專(zhuān)政的職能。這些例子具有典型性和時(shí)效性，能讓學(xué)生容易從例子中得出知識(shí)點(diǎn)，引導(dǎo)學(xué)生理解我國(guó)的專(zhuān)政是對(duì)極少數(shù)敵人實(shí)行的專(zhuān)政。并通過(guò)《反分裂法》的制定，讓學(xué)生討論為什么我國(guó)既要實(shí)行民主職能又實(shí)行專(zhuān)政職能，以此來(lái)分析民主與專(zhuān)政的關(guān)系（區(qū)別和聯(lián)系）。培養(yǎng)學(xué)生獲取信息的能力，自主學(xué)習(xí)的能力以及全面看問(wèn)題的能力，再結(jié)合教師的講授，給學(xué)生一種茅塞頓開(kāi)的感覺(jué)。環(huán)節(jié)四 情景回歸 情感升華這一環(huán)節(jié)，我將設(shè)置分組討論，讓學(xué)生們分別從人民民主專(zhuān)政的重要地位、“民主”與“專(zhuān)政”這兩項(xiàng)職能、改革開(kāi)放的歷史條件下新時(shí)期內(nèi)容三個(gè)方面來(lái)分析為什么堅(jiān)持人民民主是正義的事，討論后每組派出代表來(lái)發(fā)表各自組的結(jié)論，得出我國(guó)要堅(jiān)持人民民主專(zhuān)政。通過(guò)小組討論，使學(xué)生學(xué)會(huì)在合作中學(xué)習(xí)，提高學(xué)生的語(yǔ)言表達(dá)和思維能力。
人教版高中地理必修2從市中心到郊區(qū)，你選擇住哪里說(shuō)課稿
課前活動(dòng)：分成四組，對(duì)南京三個(gè)住房地段進(jìn)行調(diào)查，新街口夫子廟、板倉(cāng)、仙林，對(duì)住房居民進(jìn)行問(wèn)卷調(diào)查，自行設(shè)計(jì)調(diào)查問(wèn)卷，分析該地段的房?jī)r(jià)要求，居民的要求，居民為何要在該地段購(gòu)買(mǎi)住房，基礎(chǔ)設(shè)施設(shè)置等等其它與居民購(gòu)房有關(guān)的因素。◆設(shè)計(jì)意圖：利用課前小組探究形式對(duì)所學(xué)問(wèn)題進(jìn)行相關(guān)調(diào)查，不僅讓學(xué)生掌握知識(shí)了解知識(shí)來(lái)源于社會(huì)還能培養(yǎng)學(xué)生深入生活交際表達(dá)能力以及合作探究能力；3.問(wèn)題設(shè)計(jì)同學(xué)們，不知道你們?cè)谡{(diào)查過(guò)程中是否發(fā)現(xiàn)一個(gè)問(wèn)題，郊區(qū)的房子，特別是別墅，都是些高檔居所，許多有錢(qián)人的居住場(chǎng)所，那為什么會(huì)這樣呢？伴隨著城市化進(jìn)程中居民都往城里擠，為什么還會(huì)有許多有錢(qián)人往郊區(qū)搬呢？這就是我們今天要研究的第二個(gè)問(wèn)題：逆城市化?！粼O(shè)計(jì)意圖：承轉(zhuǎn)過(guò)渡知識(shí)，從購(gòu)房選擇因素的學(xué)習(xí)過(guò)渡到郊區(qū)化的學(xué)習(xí)，同時(shí)培養(yǎng)學(xué)生發(fā)現(xiàn)問(wèn)題的能力，給學(xué)生以啟迪。
新人教版高中英語(yǔ)必修3Unit 4 Space Exploration-Reading For Writing教學(xué)設(shè)計(jì)一
另一方面，其余的人反對(duì)這個(gè)計(jì)劃，因?yàn)樗赡軙?huì)導(dǎo)致一些不好的影響。7.I hold the belief that space exploration not only enable us to understand how the universe began but also help us survived well into the future.我堅(jiān)信探索太空不僅能夠使我們了解宇宙的起源而且能夠幫助我們更好地走進(jìn)未來(lái)。8.I think we should spend more time and money exploring space so as to provide new and better solutions to people's shortterm and longterm problems.為了給人類(lèi)的短期和長(zhǎng)期問(wèn)題提供更新和更好的解決方法，我認(rèn)為我們應(yīng)該花更多的時(shí)間和金錢(qián)來(lái)探索太空。9．From my point of view，it is wrong of young people to depend on their telephones too much，which may do harm to both their physical and mental health.在我看來(lái)，年輕人過(guò)度依賴(lài)手機(jī)是不對(duì)的，因?yàn)樗鼈兛赡軙?huì)對(duì)他們的身心健康都有害。最近你班同學(xué)就“人類(lèi)是否應(yīng)該進(jìn)行宇宙探索”這個(gè)問(wèn)題進(jìn)行了激烈的討論。有人認(rèn)為，探索宇宙不僅讓人類(lèi)更好地了解宇宙的發(fā)展，還可以用來(lái)指導(dǎo)農(nóng)業(yè)生產(chǎn)，以及把一些探索太空的高新技術(shù)用于現(xiàn)實(shí)生活；也有一些人認(rèn)為探索太空花掉了大量的人力物力；影響了人們的生活水平。請(qǐng)你根據(jù)以下情況寫(xiě)一篇報(bào)告并發(fā)表自己的觀點(diǎn)。注意：1.寫(xiě)作內(nèi)容應(yīng)包括以上全部要點(diǎn)，可適當(dāng)發(fā)揮，使上下文連貫；
新人教版高中英語(yǔ)必修3Unit 4 Space Exploration-Listening&Speaking&Talking教學(xué)設(shè)計(jì)一
Listening and Speaking introduces the topic of “talking about how to become an astronaut”. This period is aimed to inform students some details about the requirements of being an astronaut. Students can be motivated and inspired by the astronauts. Teachers ought to encourage students to learn from them and let them aim high and dream big.Listening and Talking introduces the theme of "talk about life in space". This part also informs students more details about life in space and can inspire students to be curious about this job. 1. Guide students to listen for numbers concerning dates, years and ages etc2. Cultivate students' ability to talk about how to become an astronaut and life in space ; 3. Instruct students to use functional sentences of the dialogue such as “ first of all, I am not sure, so what might be .. I guess.. I wonder…I am curious…)appropriately.1. Guide students to understand the content of listening texts in terms of the whole and key details; 2. Cultivate students' ability to guess the meaning of words in listening; discuss with their peers how to become a qualified astronaut and describe the life in space.Part 1: Listening and SpeakingStep 1: Lead inPredictionThe teacher can ask students to predict what the listening text is about by looking at the pictures.About how to become an astronaut./the requirements of an astronautStep 2: Then, play the radio which is about an interview a. And after finishing listening for the first time, the students need to solve the following tasks.
新人教版高中英語(yǔ)必修3Unit 4 Space Exploration-Reading and Thinking教學(xué)設(shè)計(jì)一
Q4: What is the function of the International exploration ?Having astronauts from different countries on boardQ5: What can you learn from Para 4 ?China has made great achievements in exploring spaceQ6: What is the attitude to the space exploration ?SupportiveStep 6 Post reading---RetellPeople have always wanted to learn more about space. Before the mid-20th century, most people felt (1)_________ (travel) into space was an impossible dream. However, (2)____ the help of scientists, peoplesucceeded in realizing their dream (3) _________ (explore) space. On 4 October 1957, the Sputnik 1 satellite (4) ____________(launch) by the USSR. (5) ________________ scientists try to make sure nothing goes wrong, accidents can still happen. These disasters made everyone(6)___________(disappoint), but people still believe in the importance of (7) ________(carry) on space exploration. In 2003, China became the third country to (8)_____________ (independent) send humans into space. Then Shenzhou 6 and 7 completed (9)____ second manned orbit and the first Chinese spacewalk. In spite of the difficulties, scientists hope future (10)__________ (discovery) will not only enable us to understand the universe but also help us survive well into the future.Answers: 1. travelling 2. with 3. to explore 4. was launched 5. Although6. disappointed 7. carrying 8. independently 9. a 10. discoveriesStep 6 Post reading---Critical thinkingQ1: What do you think of the space exploration ? I think it is beneficial to us. Through further study of space, people will make full use of it in the future, such as the space experiments by Wang Yaping in Tian Gong 1.Q2: If you are determined to be an astronaut, what should you prepare at present ?First of all, I should study hard to get a related college degree. Besides, I must keep mental and physical healthy.Step 7. HomeworkTry to summarize the structure of the article by a mind map.
新人教版高中英語(yǔ)必修3Unit 5 The Value of Money-Reading and Thinking教學(xué)設(shè)計(jì)一
Everybody wants to get wealth.In today’s material world,making money or becoming wealthy symbolizes a person’s success and capability. Many people just make every effort, pay any price to attain greater wealth. With money,they can buy nice, large apartments in nice neighborhood. With money they can own luxurious cars. Wealth seems to bring all happiness in life.But is wealth the only road to happiness? Not really. There are many things in the world, which are beyond the means of money, such as friendship, love, health and knowledge. People are so preoccupied with struggling for money that they have no time or would not take the time to form or maintain friendship. What happiness can they feel living as lonely miserable creatures without love or friends in the world even if they accumulate tremendous wealth?In my opinion, people can’t do anything without money, but money is not everything. What money will bring you depends on your personal belief and goal in life. If you are kind enough to help others, especially the poor, money is a good thing to you. With it, you can do much more for the benefit of people and your country, and it will add to your own happiness. If you want money just for your own needs, you’ll never be satisfied or happy. In a word,you should have money spent for more people. Only then can money be the source of your happiness.Step 8 Homework4 students in a group, one acts Roderick, one Oliver, one servant and the fourth one acts Henry Adams, then listen to the tape, pay more attention to the difference between American English and British English in pronunciation, stress, tone.
新人教版高中英語(yǔ)必修3Unit 5 the value of money-Reading For Writing教學(xué)設(shè)計(jì)一
【參考范文】Narrator：(Henry is smiling as he leaves the restaurant. As he is walking down the street, he sees a sign for a place that cuts hair. He decides to get it cut. )H＝Henry；B＝Barber；R＝rude manH：Good afternoon, I'd like to get a cut, if I may. (The barber looks at Henry's hair and continues cutting another man's hair. )Er, I'd really like a haircut. As you can see it's much too long. B：(in a rude manner) Yes, I can see that. Indeed, I can. H：Fine, well I'll have a seat then. (He sits in one of the barber's chairs. The barber turns to look at Henry. )B：It's quite expensive here, you know！Are you sure you can afford it?H：Yes. I think so. (In comes the rude man. )R：Hey you there. I need a haircut quickly. Can you do me straightaway?B：All right, then, get in the chair and I'll see what I can do. R：Thank you. (sits down in one of the barber's chairs)H：Excuse me, but I was here first. Aren't you going to do my hair first?B：This man's in a hurry. H：Well so am I！I insist that you cut my hair first. B：OK, but I'll have to be quick. This gentleman is waiting. H：Thank you. (They both become quiet. After his hair is cut, the barber tells Henry how much he must pay. Henry shows the barber the bank note. )B：Why, Mr . . . (looks shocked)H：Adams. Henry Adams. I'm sorry, I don't have any change. R：You're that Mr Adams! Well，I'm glad I waited or I might never have known it was you. B：Why, Mr Adams, please don't worry！(wearing a big smile) Nothing to worry about！Nothing at all!Please come back any time, even if you only need too little hairs cut！It will be my honour to serve you!
人教版高中政治必修4人的認(rèn)識(shí)從何而來(lái)說(shuō)課稿（一）
展示學(xué)習(xí)過(guò)的物理學(xué)內(nèi)容：伽利略的“比薩斜塔”實(shí)驗(yàn)，證明了：兩個(gè)鐵球同時(shí)落地。得出結(jié)論：實(shí)踐是檢驗(yàn)認(rèn)識(shí)正確與否的唯一標(biāo)準(zhǔn)。（因?yàn)檫@點(diǎn)理解起來(lái)有點(diǎn)難，所一教師要適當(dāng)?shù)闹v解）A、一種認(rèn)識(shí)是否是真理不能由這一認(rèn)識(shí)本身回答B(yǎng)、客觀事物自身也不能回答認(rèn)識(shí)是否正確地反映了它C、實(shí)踐是聯(lián)系主觀與客觀的橋梁。人們把認(rèn)識(shí)和實(shí)踐的結(jié)果對(duì)照,相符合,認(rèn)識(shí)就正確?！?實(shí)踐是認(rèn)識(shí)的目的和歸宿：走進(jìn)社會(huì)：（課本P46歸國(guó)博士案例）從這個(gè)故事中我們可以得到什么啟示？得出結(jié)論：實(shí)踐是認(rèn)識(shí)的歸宿和目的。啟發(fā)學(xué)生學(xué)以致用，eg：紀(jì)中的學(xué)生研究地溝油簡(jiǎn)易檢測(cè)方法（靈活利用身邊的教學(xué)資源）?！景鍟?shū)設(shè)計(jì)】實(shí)踐是認(rèn)識(shí)的基礎(chǔ)（板書(shū)）投影：逐步展示本課知識(shí)結(jié)構(gòu)圖。學(xué)生通過(guò)回憶，讓學(xué)生有直觀的認(rèn)識(shí)，學(xué)習(xí)內(nèi)容一目了然。1．實(shí)踐是認(rèn)識(shí)的來(lái)源。2．實(shí)踐是認(rèn)識(shí)發(fā)展的動(dòng)力。3．實(shí)踐是檢驗(yàn)認(rèn)識(shí)的真理性的唯一標(biāo)準(zhǔn)。
人教版高中政治必修3在文化生活中選擇說(shuō)課稿3篇
生2：每逢清明，或其他一些死者的紀(jì)念日，人們總要為死去的親人燒紙錢(qián)。這幅漫畫(huà)由燒紙錢(qián)演變?yōu)闊凹译姟?，說(shuō)明隨著社會(huì)環(huán)境的變化，人們根深蒂固的一些封建思想，還在影響著人們的生活。要花大力氣去破除封建迷信活動(dòng)。師：說(shuō)到底，算命、燒紙錢(qián)是封建迷信活動(dòng)，從文化角度來(lái)說(shuō)，是落后文化。我們一起來(lái)看看在現(xiàn)實(shí)生活中，還有哪些落后文化在影響著人們的生活。生1：在一些邊遠(yuǎn)落后地區(qū)，大人小孩生了病，不是看醫(yī)生，而是讓巫婆神漢來(lái)治，結(jié)果往往耽誤了診療時(shí)間，有的甚至還丟掉了性命。生2：“重男輕女”“多子多?！?，紅白事大操大辦現(xiàn)象在有些地方還很?chē)?yán)重。師：這些落后文化都有哪些共同特征？在你看來(lái)，這些現(xiàn)象有哪些危害？生3：這些落后文化，在內(nèi)容上帶有迷信、愚昧、頹廢、庸俗等色彩，在形式上常常以傳統(tǒng)習(xí)俗的形式表現(xiàn)出來(lái)，如人們常見(jiàn)的看相、算命、測(cè)字、看風(fēng)水等。它會(huì)麻痹人的意志，使人消極、悲觀、絕望，對(duì)理想、前途、信念喪失信心；破壞社會(huì)的風(fēng)氣。
人教版高中地理必修2南京的自行車(chē)是多了還是少了說(shuō)課稿
在學(xué)生回答的基礎(chǔ)上進(jìn)行歸納小結(jié)：發(fā)展城市公共交通? 明確道路分工? 合理規(guī)劃停車(chē)場(chǎng)? 減少出行距離? 錯(cuò)開(kāi)出行高峰? 加大城市道路建設(shè)? 進(jìn)行科學(xué)合理的交通管理，重視智能交通系統(tǒng)的建設(shè)提問(wèn)：這組同學(xué)在幻燈片中提到城市環(huán)境污染源主要有哪些？城市交通環(huán)境問(wèn)題除了交通工具的尾氣排放帶來(lái)大氣污染外，還會(huì)給城市環(huán)境帶來(lái)什么問(wèn)題？這組同學(xué)基本同意自行車(chē)多是加劇南京空氣污染的間接原因，你同意他們的觀點(diǎn)嗎？在學(xué)生回答的基礎(chǔ)上，教師進(jìn)行歸納小結(jié)：自行車(chē)是一種綠色交通工具，既環(huán)保又經(jīng)濟(jì)。只有當(dāng)它在某些機(jī)動(dòng)車(chē)和非機(jī)動(dòng)車(chē)不分的地段，影響車(chē)輛行駛速度的時(shí)候，它才可能成為加劇空氣污染的間接原因。那么我們針對(duì)交通工具對(duì)環(huán)境造成的影響，除了這組同學(xué)提到的三點(diǎn)解決措施以外，我們還有什么要補(bǔ)充的解決方法嗎？
人教版高中地理必修2如何看待農(nóng)民工現(xiàn)象說(shuō)課稿
b.基于對(duì)農(nóng)民工現(xiàn)象的認(rèn)識(shí)以及資料2的分析，請(qǐng)同學(xué)辨證的分析出這一現(xiàn)象的利弊——分析問(wèn)題，當(dāng)然，這一部分內(nèi)容還是要以學(xué)生自主學(xué)習(xí)、合作學(xué)習(xí)為主，但教師要給予一定的引導(dǎo)。c.最后，請(qǐng)同學(xué)討論，提出自己的意見(jiàn)和建議，應(yīng)該怎樣解決農(nóng)民工所面臨的問(wèn)題——解決問(wèn)題。這一部分要求學(xué)生提出自己的見(jiàn)解，不局限于書(shū)本，發(fā)揮自身的創(chuàng)造性思維。3.課堂小結(jié)：本節(jié)課作為問(wèn)題研究課程，探討了我國(guó)現(xiàn)階段的農(nóng)民工現(xiàn)象，了解了農(nóng)民工生存的環(huán)境，以及體會(huì)了解決農(nóng)民工問(wèn)題的必要性和重要性，并通過(guò)合作探討，得出了一些列解決的方案。著重培養(yǎng)大家對(duì)于問(wèn)題的綜合分析能力。增加大家對(duì)農(nóng)民工現(xiàn)象的感性認(rèn)識(shí)，希望大家運(yùn)用所學(xué)知識(shí)關(guān)心現(xiàn)實(shí)社會(huì)中的問(wèn)題，增強(qiáng)社會(huì)責(zé)任感，學(xué)以致用。
人教版高中生物必修2基因是有遺傳效應(yīng)的DNA片段說(shuō)課稿
1.基因的化學(xué)組成：每個(gè)基因含有成百上千個(gè)脫氧核苷酸。講述：基因的脫氧核苷酸排列順序代表遺傳信息。2.基因不同的實(shí)質(zhì)：不同的基因，四種脫氧核苷酸的排列順序不同，但是每個(gè)基因都有特定的排列順序。3.基因的位置：染色體是基因的主要載體，每個(gè)染色體含有一個(gè)DNA分子，每個(gè)DNA分子含有多個(gè)基因，基因在染色體上呈直線排列。4.基因是有遺傳效應(yīng)的DNA片段這就是說(shuō)，基因是DNA的片段，但必須具有遺傳效應(yīng)（指具有復(fù)制、轉(zhuǎn)錄、翻譯、重組突變及調(diào)控等功能）。有的DNA片段屬間隔區(qū)段，沒(méi)有控制性狀的作用，這樣的DNA片段就不是基因?？刂颇撤N性狀的基因有特定的DNA片段，蘊(yùn)含特定的遺傳信息，可以切除，可以拼接到其他生物的DNA上，從而獲得某種性狀的表達(dá)。例如：把牛的胰島素基因拼接到大腸桿菌的DNA上，大腸桿菌可以生產(chǎn)胰島素。
人教版高中生物必修2基因指導(dǎo)蛋白質(zhì)的合成說(shuō)課稿
六、說(shuō)教學(xué)反思由于本節(jié)內(nèi)容抽象復(fù)雜, 插圖多, 涉及的物質(zhì)種類(lèi)也比較多，應(yīng)要求學(xué)生做好課前預(yù)習(xí)。教學(xué)中，在處理主干知識(shí)和側(cè)枝內(nèi)容的關(guān)系時(shí)，要做到合理分配時(shí)間，明確不同內(nèi)容的教學(xué)要求。教師要注意將知識(shí)及時(shí)進(jìn)行歸納、比較和總結(jié)。要讓學(xué)生了解各個(gè)知識(shí)點(diǎn)間的內(nèi)在關(guān)系，又要能簡(jiǎn)潔、清晰地概述轉(zhuǎn)錄和翻譯的過(guò)程。教師在備課時(shí)，一定要仔細(xì)分辨并揣摩插圖所表達(dá)的意思，并能將不同的插圖內(nèi)容與教學(xué)流程有機(jī)地結(jié)合起來(lái)。在對(duì)插圖的處理上，還應(yīng)分清主次和輕重。教材在呈現(xiàn)教學(xué)內(nèi)容時(shí)，采用圖文并茂的方式來(lái)揭示轉(zhuǎn)錄與翻譯的動(dòng)態(tài)過(guò)程。因此，教師不僅要利用插圖達(dá)到形象和直觀的教學(xué)效果，還應(yīng)配合教材中的文字描述作深入淺出的講解，使文字信息與圖形信息結(jié)合起來(lái)，讓學(xué)生感知到基因的表達(dá)是一個(gè)多層次的、動(dòng)態(tài)的、相互協(xié)調(diào)和配合的過(guò)程。盡可能利用多媒體課件進(jìn)行教學(xué)。多媒體課件可以形象、生動(dòng)地反映基因表達(dá)的過(guò)程，這是紙質(zhì)教材難以做到的。
人教版高中生物必修2基因?qū)π誀畹目刂普f(shuō)課稿
7．讓學(xué)生閱讀基因控制蛋白質(zhì)合成的過(guò)程（轉(zhuǎn)錄,翻譯）13分鐘 動(dòng)畫(huà)演示“轉(zhuǎn)錄,翻譯”過(guò)程兩次,讓學(xué)生有個(gè)整體印象。 培養(yǎng)學(xué)生自學(xué)習(xí)慣，突出教學(xué)過(guò)程中的學(xué)生為主體的教學(xué)思想。 8．配合動(dòng)畫(huà)引導(dǎo)學(xué)生根據(jù)預(yù)習(xí)逐段講解。 注意問(wèn)題（1）轉(zhuǎn)錄,翻譯的地點(diǎn),模板,生成物不同。因?yàn)檫@是一個(gè)極其復(fù)雜的過(guò)程,避免學(xué)生在學(xué)習(xí)過(guò)程中相混肴.（2）這個(gè)問(wèn)題的闡明能為后面“密碼子”的概念做好鋪墊,避免學(xué)生搞不清“遺傳密碼”和“遺傳信息”兩個(gè)概念。 9．打出板書(shū)。 通過(guò)動(dòng)畫(huà)演示,加深學(xué)生的理解和掌握,提高學(xué)習(xí)效率。 10．重播全過(guò)程動(dòng)畫(huà),引導(dǎo)學(xué)生講述。7分鐘 _x0007_加深認(rèn)識(shí),完成從量變到質(zhì)變的飛躍。 11．過(guò)渡：就這樣，以DNA為模板合成信使RNA，再以信使RNA為模板,以轉(zhuǎn)運(yùn)RNA為運(yùn)載工具,使氨基酸在核糖體中按照一定的順序排列起來(lái),合成了與親代一樣的蛋白質(zhì),從而顯現(xiàn)出與親代同樣的性狀。從而引出“中心法則”。
人教版高中生物必修2基因突變和基因重組說(shuō)課稿
1、教材內(nèi)容本節(jié)是人教版普通高中標(biāo)準(zhǔn)實(shí)驗(yàn)教科書(shū)生物必修2《遺傳與進(jìn)化》的第五章《基因突變及其他變異》的第一節(jié)內(nèi)容。本節(jié)介紹了可遺傳變異的兩種類(lèi)型：基因突變和基因重組，其中基因突變從實(shí)例對(duì)鐮刀型細(xì)胞貧血癥的分析入手，引入基因突變的概念，然后詳細(xì)闡述基因突變的原因和特點(diǎn)、意義。在闡述自然狀態(tài)下基因突變的頻率很低時(shí)，教材用實(shí)例說(shuō)明在一個(gè)足夠大的群體中，即使基因突變頻率很低，突變個(gè)體仍然會(huì)占有一定的數(shù)量。這個(gè)實(shí)例體現(xiàn)了生物在進(jìn)化過(guò)程中“變”與“不變”的平衡，有助于學(xué)生理解基因突變?cè)谏镞M(jìn)化中所占有的重要地位。在基因重組部分，教材設(shè)置了“思考與討論“的欄目，旨在讓學(xué)生利用數(shù)學(xué)方法，通過(guò)計(jì)算，體會(huì)基因重組機(jī)制提供的極其多樣的基因組合方式，從而幫助學(xué)生理解基因重組是生物多樣性形成的主要原因。正文中則簡(jiǎn)要闡述了基因重組的概念、類(lèi)型和意義。本節(jié)內(nèi)容引導(dǎo)學(xué)生從分子水平上理解遺傳物質(zhì)如何引起生物變異的。
人教版高中生物必修2減數(shù)分裂和受精作用說(shuō)課稿
一 減數(shù)分裂高一生物減數(shù)分裂說(shuō)課稿各位評(píng)委、老師：大家好，我今天說(shuō)課的題目是高中生物必修2第二章第一節(jié)〈〈減數(shù)分裂與受精作用〉〉第一部分減數(shù)分裂第一課時(shí)精子形成過(guò)程。接下來(lái)我就從以下幾個(gè)方面來(lái)說(shuō)說(shuō)這一節(jié)課。一、說(shuō)教材1．教材地位和作用《減數(shù)分裂》這一部分內(nèi)容不僅是第二章的重點(diǎn)內(nèi)容，也是整本書(shū)的重點(diǎn)內(nèi)容之一。它以必修一學(xué)過(guò)的細(xì)胞學(xué)知識(shí)、染色體知識(shí)、有絲分裂知識(shí)和初中生殖種類(lèi)知識(shí)為基礎(chǔ)。通過(guò)學(xué)習(xí)，使學(xué)生全面認(rèn)識(shí)細(xì)胞分裂的種類(lèi)、實(shí)質(zhì)和意義，為后面學(xué)習(xí)遺傳和變異，生物的進(jìn)化奠定細(xì)胞學(xué)基礎(chǔ)。2．教學(xué)目標(biāo)（1）知識(shí)目標(biāo)：掌握減數(shù)分裂的概念和精子的形成過(guò)程；理解減數(shù)分裂和受精作用的意義。（2）能力目標(biāo)：通過(guò)觀察減數(shù)分裂過(guò)程中染色體的行為變化，培養(yǎng)學(xué)生識(shí)圖、繪圖能力以及比較分析和歸納總結(jié)的能力。
人教版高中生物必修2現(xiàn)代生物進(jìn)化理論的主要內(nèi)容說(shuō)課稿
什么因素可以阻止種群間基因交流呢？由此可引出隔離的概念。學(xué)生初步理解隔離的概念之后，可以安排學(xué)生討論隔離的各種可能的方式，教師歸納出隔離的類(lèi)型。然后組織學(xué)生閱讀分析教材中的“資料分析”，組織討論“資料分析”中提出的幾個(gè)問(wèn)題。最后教師應(yīng)強(qiáng)調(diào)，一般情況下，地理隔離是生殖隔離的先決條件，生殖隔離一旦形成，原來(lái)屬于一個(gè)物種的兩個(gè)種群，就成了兩個(gè)物種。關(guān)于“共同進(jìn)化與生物多樣性的形成”內(nèi)容的教學(xué)，可以學(xué)生自學(xué)為基礎(chǔ)，教師提出一些具有啟發(fā)性的問(wèn)題，師生共同歸納總結(jié)的方式推進(jìn)教學(xué)過(guò)程。使學(xué)生理解共同進(jìn)化的含義，無(wú)機(jī)環(huán)境的變化、無(wú)機(jī)環(huán)境的復(fù)雜化和多樣化、有性生殖的出現(xiàn)和生態(tài)系統(tǒng)結(jié)構(gòu)的復(fù)雜化和多樣化對(duì)生物多樣性形成的作用。最后，組織學(xué)生討論生物進(jìn)化理論在發(fā)展。
人教版高中生物必修2孟德?tīng)柕耐愣闺s交實(shí)驗(yàn)說(shuō)課稿
一、說(shuō)教材1、教材的地位和作用《孟德?tīng)柕耐愣闺s交實(shí)驗(yàn)（一）》這一課題是高中生物必修2第一章第一節(jié)第一部分的內(nèi)容，是學(xué)生學(xué)習(xí)孟德?tīng)柕耐愣闺s交實(shí)驗(yàn)（二）的基礎(chǔ)，也是第二章《減數(shù)分裂與受精作用》這節(jié)知識(shí)的重要基礎(chǔ)，又并為后續(xù)學(xué)習(xí)生物變異與生物進(jìn)化奠基，所以在教材中起到承上啟下的作用。因此從這個(gè)地位來(lái)看，這部分內(nèi)容不僅是本章的重點(diǎn)，更是整個(gè)必修2的重點(diǎn)內(nèi)容。本節(jié)的教學(xué)內(nèi)容是按照孟德?tīng)柕奶剿鬟^(guò)程由現(xiàn)象到實(shí)質(zhì)，層層深入地展開(kāi)的。教材首先介紹了孟德?tīng)柕碾s交實(shí)驗(yàn)方法和觀察到的實(shí)驗(yàn)現(xiàn)象，接著介紹了孟德?tīng)枌?duì)實(shí)驗(yàn)現(xiàn)象的分析，然后介紹了對(duì)分離現(xiàn)象解釋的驗(yàn)證，最后歸納總結(jié)出分離定律。在教學(xué)內(nèi)容的組織上體現(xiàn)了學(xué)科內(nèi)在邏輯性與學(xué)生認(rèn)識(shí)規(guī)律的統(tǒng)一。與原教材比較，有了新的突破主要表現(xiàn)在三方面：