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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)二
The theme of this unit focuses on “space exploration.” Students will learn about the training and experience needed to become an astronaut. The text is mainly about the development of space exploration. On the one hand, the text helps students to have a good understanding about the great feats humans have achieved, on the other hand, they will further understand the contributions that we Chinese have achieved, and feel confident and proud about our homeland and strengthen their love for our country. The teacher should instruct students to aim high and study harder to make great progress in the space career if possible.1. Read about the development and value of space exploration.2. Explore the mysteries of the universe and the achievements in space exploration.3. Skillfully use the vocabulary of this text to cultivate self-study ability 4. Develop cooperative learning ability through discussion.1. Enable the Ss to talk about the development and value of space exploration.2. Guide the Ss to summarize the main idea of each paragraph as well as the main idea of the text.3. Help Ss comprehend the main reasons for space exploration. Multi-media, textbook, notebooks.Step 1: Warming up and predictionLook at the title and the pictures of the text and predict what the text will be about?2. What are the main reasons for space exploration?
新人教版高中英語(yǔ)必修3Unit 5 The Value of Money- Discovering Useful Structure教學(xué)設(shè)計(jì)
Step 3 Meaning1. 過(guò)去將來(lái)時(shí)表示從過(guò)去某一時(shí)間來(lái)看將要發(fā)生的動(dòng)作或存在的狀態(tài), 常用在賓語(yǔ)從句中。一般由“would/should +動(dòng)詞原形”構(gòu)成。She hoped that they would meet again someday. 她希望將來(lái)有一天他們能再見面。2. was/were going to+動(dòng)詞原形: 表示過(guò)去將要發(fā)生或很有可能發(fā)生的動(dòng)作, 常用于口語(yǔ)中, 表示預(yù)言、意圖或者打算等。He was going to start work the following week. 他打算下星期開始工作。3. was/were about to do: 常用來(lái)表示即將發(fā)生的動(dòng)作, “剛要/正要做……”。注意該結(jié)構(gòu)不與任何時(shí)間狀語(yǔ)連用。I felt that something terrible was about to happen. 我感到某種可怕的事情即將發(fā)生。4.was/were to do: 表示“曾計(jì)劃做某事”, 如果表示“本來(lái)計(jì)劃做某事, 動(dòng)作沒實(shí)現(xiàn)”, 則需用 “was/were to have done”。She said she was to have told me about the accident. 她說(shuō)她本來(lái)想告訴我關(guān)于事故的事。5.Start, go, come, leave, see, meet等動(dòng)詞的過(guò)去進(jìn)行時(shí): 表示就過(guò)去某一時(shí)刻而言即將發(fā)生的動(dòng)作。She was coming later. 她隨后就來(lái)。I had just put on my overcoat and was leaving to visit a friend of mine. 我剛穿上外套要去看我的一個(gè)朋友。
新人教版高中英語(yǔ)必修3Unit 5 The Value of Money-Listening &Speaking＆Talking教學(xué)設(shè)計(jì)
4. A：We’d like to have someone to say a word at the beginning to welcome the group.B：↙Who?A：We thought that you or Dr.Johnson might do it.B用降調(diào)說(shuō)Who，其意思是問，對(duì)方想讓誰(shuí)在開場(chǎng)時(shí)致歡迎詞。Step 6 Pronunciation---Practice1. Listen to the short conversation and mark the intonation with ↗, ↙ or ↙, ↗. Then discuss with a partner what they intend to convey by using different intonation.Owner: You know what ?↗ It’s a million-pound bank note↙.Waiter 1: Really ?↗(question)Waiter 2: Really !↙(unbelievable and surprised)Waiter 3: Really ?!↙↗(first question then surprised)2. Listen to the conversations. Underline the parts that are stressed and mark the intonation. Then talk about the implied meanings of the responses with different intonations. Listen again and repeat.1) Henry: It’s a nice suit.Owner: Oh, it’s perfect!↙(The intonation means it is very suitable for Henry.)2) Henry: Well, that’s very kind of you.Owner: Kind, sir ?↗(what you said is not right) No, it’s kind of you. You must come whenever you want and have whatever you like. Just having you sit here is a great honour !!↙(welcome you to come again)3)Henry:Well, to be honest, I have none. Oliver:(happily) What luck!(excited) Brother↗, what luck!↙(It means “Didn’t you hear it?”)Henry: Well, it may seem lucky to you but not to me!↗(angry) If this is your idea of some kind of joke, I don’t think it’s very funny. Now if you’ll excuse me, I ought to be on my way.↙(If so, I would leave.)Roderick: Please don’t go↙...(hope Henry can wait for a moment)Part B Viewing and Talking---Describe people’s changing attitudes in a film clipStep 1 Before-listening---Tell the filmYou are going to watch part of the film The Million Pound Bank Note. Look at these photos and guess what happens in the film.
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)二
? Could you offer me some kind of work here?? I don’t want your charity, I just want an honest job.? Careless: I landed in Britain by accident.Step 7:Consolidation.? Find Henry? Roderick and Oliver were I .making a bet when they saw Henry, a poor young man. ? Know Henry? About a month ago, Henry was sailing and later he found himself carried out to sea by a strong wind. Fortunately, he 2.was spotted by a ship. And it was the ship that brought him to 3.England? Offer money to Henry ? Oliver and Roderick gave Henry a letter and told him that there was money in it. They 4.persuaded him to accept it, and made him 5.promise that it wouldn't be opened until 2 o'clock.Step 8：Language pointsa large amount of: a large quantity of; a great deal ofe.g. They bought a large amount of furniture before they moved their new house.make a bet: make an arrangement to risk money, etc. on an event of which the result is doubtful.e.g. We made a bet on the result of the match.permit sb to do something: allow somebody to do somethinge.g. My mother doesn’t permit me to ride in the street after it rained.by accident: as a result of chancee.g. I only found it by accident.stare at: look at somebody or something with the eyes wide open in a fixed gaze( in astonishment, wonder, fear, etc)to be honest: to tell you the truth; to be franke.g. To be honest, I don’t think we have a chance of winning.Step7 Homework:What do you think will happen to Henry? Will the bank-note help him or get him into trouble?
新人教版高中英語(yǔ)必修3Unit 1 Festivals and celebrations-Discovering Useful Structure教學(xué)設(shè)計(jì)
4.That was an experience that frightened everyone. →That was _____________________. 答案：1. taking 2. being discussed 3. in the reading room 4. a frightening experienceStep 6 The meaning and function of V-ing as the predicative動(dòng)詞-ing形式作表語(yǔ)，它通常位于系動(dòng)詞后面，用以說(shuō)明主語(yǔ)“是什么”或“怎么樣”一種表示主語(yǔ)的特質(zhì)、特征和狀態(tài), 其作用相當(dāng)于形容詞; 另一種具體說(shuō)明主語(yǔ)的內(nèi)容, 即主語(yǔ)等同于表語(yǔ), 兩者可互換。The music they are playing sounds so exciting. 他們演奏的音樂聽起來(lái)令人激動(dòng)。The result is disappointing. 結(jié)果令人失望。Our job is playing all kinds of music. 我們的工作就是演奏各種音樂。Seeing is believing. 眼見為實(shí)。Step 7 Practice1. It is ________(amaze) that the boy is able to solve the problem so quickly.2. Buying a car is simply _______(waste) money. 3. Please stop making the noise—it’s getting ________(annoy). 4. complete the passage with the appropriate -ing form.La Tomatina is a festival that takes place in the Spanish town Bunol every August. I think many food festivals are __________ because people are just eating. however, this festival is _________ because people don't actually eat the tomatoes. Instead, they throw them at each other! the number of people ________ part in this tomato fight, can reach up to 20,000, and it is a very __________ fight that lasts for a whole hour. The _______ thing is how clean Bunol is after the tomatoes are washed away after the fight. this is because the juice form tomatoes is really good for making surfaces clean!答案：1. amazing 2. wasting 3. annoying4. boring interesting taking exciting amazing
新人教版高中英語(yǔ)必修3Unit 1 Festivals and Celebrations-Reading for writing教學(xué)設(shè)計(jì)二
Step 3 Analyzing article structureActivity 31. Teachers raise questions to guide students to analyze the chapter structure of this diary and think about how to describe the festival experience. (1)What should be included in the opening/body/closing paragraph(s)?(2)How did the writer arrange his/her ideas?(3)What kind of interesting details did the writer describe?(4)How did the writer describe his/her feelings/emotions during the event?2. Students read and compare the three sentence patterns in activity 2. Try to rewrite the first paragraph of the diary with these three sentence patterns. After that, students exchange corrections with their partners. Such as:●This was my first time spending three days experiencing the Naadam Festival in China’s Inner Mongolia Autonomous Region and it was an enjoyable and exciting experience. ●I'll never forget my experience at the Naadam Festival because it was my first time to watch the exciting Mongolian games of horse racing, wrestling, and archery so closely. ●I'll always remember my first experience at the Naadam Festival in China’s Inner Mongolia Autonomous Region because it was so amazing to spend three days witnessing a grand Mongolian ceremony. Step 4 Accumulation of statementsActivity 41. Ask the students to read the diary again. Look for sentences that express feelings and emotions, especially those with the -ing form and the past participle. Such as:● …h(huán)orse racing, wrestling, and archery, which are all so exciting to watch. ● some amazing performances● I was surprised to see…● I was a little worried about. . . ● feeling really tiredOther emotional statements:●I absolutely enjoyed the archery, too, but the horse races were my favourite part. ●I'm finally back home now, feeling really tired, but celebrating Naadam with my friend was totally worth it. ●He invited me back for the winter to stay in a traditional Mongolian tent and cat hot pot. I can’t wait!2. In addition to the use of the -ing form and the past participle, the teacher should guide the students in the appreciation of these statements, ask them to memorize them, and encourage them to use them reasonably in writing practice.
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)二
⑦在我看來(lái), 探索太空是值得的。As far as I am concerned, it is worthwhile to explore the space.Step 10 Writing---draftRecently, students in our class have had heated a discussion on whether space is worth exploring. Students hold different ideas about it.30% of us think space exploration is not worthwhile. They think space is too far away from us and our daily life and is a waste of money. And the money spent on space exploration can be used to solve the earth’s problems such as starvation and pollution.On the other hand，70% think space is worth exploring because we have benefited a lot from it，such as using satellites for communication and weather forecast. What’s more，with further space research，we may solve the population problem by moving to other planets one day. Also，space research will enable us to find new sources to solve the problem of energy shortages on the earth.As far as I am concerned, it is worthwhile to explore the space. Not only can it promote the development of society but also enrich our life. Step 11 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1.Does the writer explain why he/she changed/wanted to change?2.Does the writer tell how the changes have improved or will improve his/her life?3.Is the text well－organised?4.Does the writer use words and expressions to show similarities and differences?5.Are there any grammar or spelling errors?6.Does the writer use correct punctuation？
新人教版高中英語(yǔ)必修3Unit 5 The Value of Money-Listening &Speaking教學(xué)設(shè)計(jì)
Step 4: Listen again and decide if the following statements are true (T) or false (F).1 It was the first time Chen Liyan's story was reported. T口 F口2 Chen found 10,000 yuan in a small plastic bag in Taiyuan railway station口 F口3 Wang Zheng apologized to Chen because he couldn't offer her more money. T口 F口4 Chen took out a large loan to cure her daughter, T口 F口5 Wang set up a fundraising website for Chen's daughter after Chen told him about her situation. T口 F口Step 5：After listening, discuss the questions.1 What kind of person do you think Chen Liyan is?Chen Liyan is generous and honest because she returned a large sum of money to the owner.2 Did Chen return the money because she didn't need it?No. She returned the money because it was the right thing to do. Evidence for this is that she refused to accept the reward money because she felt that it had not been earned. 3 Is it common for people to do what Chen did?It depends on the culture. In some countries it is quite common to return money that has been found. In other countries, people believe "Finders are keepers!" 4 How did Wang Zheng feel about the return of his money?He must have been very happy and relieved to have gotten his money back. We know this because he thanked Chen repeatedly and even offered her a reward.5 Why did Ma Dongbao tell Wang about Chen's family?He must have had great sympathy for Chen and her daughter and wanted to help them.'We know this because he arranged help for them. 6 How did the news reporter feel about Chen's actions?The news reporter felt that it showed that money wasn't the most important thing in life. We know this because the reporter told us that this is what Chen believes. and then said, “that's a great attitude to take."
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)二
2. 您能看到, 我頭發(fā)太長(zhǎng)了。You can see that my hair is much too long.3. 無(wú)論什么時(shí)候, 只要您想回來(lái)就回來(lái)。Please come back whenever you want.4. 您僅有很少的頭發(fā)要理! You only have too little hair to cut !5. 為您服務(wù)是我的榮幸！It is my honour to serve you!Step 9 Writing(Henry is walking down the street when he sees a sign for a place that cuts hair. He decides to have it cut. )H=Henry B=BarberH: Good afternoon, I’d like to have my hair 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. (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. B: Please don’t worry! (wearing a big smile) Nothing to worry about! Nothing at all! Please come back whenever you want, even if you only have too little hair to cut! It will be my honour to serve you!Step 10 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Are all the elements of a play included and in good order ?2. Do the character use suitable language ?3. Are the stage directions clear and useful ?4. Is the plot clear and exciting enough ?
【高教版】中職數(shù)學(xué)基礎(chǔ)模塊上冊(cè)：2.1《不等式的基本性質(zhì)》教案設(shè)計(jì)
教師姓名 課程名稱數(shù)學(xué)班 級(jí) 授課日期 授課順序 章節(jié)名稱§2.1 不等式的基本性質(zhì)教 學(xué) 目 標(biāo)知識(shí)目標(biāo)：1、理解不等式的概念 2、掌握不等式的基本性質(zhì) 技能目標(biāo)：1、會(huì)比較兩個(gè)數(shù)的大小 2、會(huì)用做差法比較兩個(gè)整式的大小 情感目標(biāo)：體會(huì)不等式在日常生活中的應(yīng)用，感受數(shù)學(xué)的有用性教學(xué) 重點(diǎn) 和 難點(diǎn) 重點(diǎn)： 不等式的概念和基本性質(zhì) 難點(diǎn)： 1、會(huì)比較兩個(gè)整式的大小 2、能根據(jù)應(yīng)用題的表述，列出相應(yīng)的表達(dá)式教 學(xué) 資 源《數(shù)學(xué)》（第一冊(cè)） 多媒體課件評(píng) 估 反 饋課堂提問 課堂練習(xí)作 業(yè)習(xí)題2.1課后記
北師大初中數(shù)學(xué)九年級(jí)上冊(cè)比例的性質(zhì)1教案
若a，b，c都是不等于零的數(shù)，且a＋bc＝b＋ca＝c＋ab＝k，求k的值.解：當(dāng)a＋b＋c≠0時(shí)，由a＋bc＝b＋ca＝c＋ab＝k，得a＋b＋b＋c＋c＋aa＋b＋c＝k，則k＝2（a＋b＋c）a＋b＋c＝2；當(dāng)a＋b＋c＝0時(shí)，則有a＋b＝－c.此時(shí)k＝a＋bc＝－cc＝－1.綜上所述，k的值是2或－1.易錯(cuò)提醒：運(yùn)用等比性質(zhì)的條件是分母之和不等于0，往往忽視這一隱含條件而出錯(cuò).本題題目中并沒有交代a＋b＋c≠0，所以應(yīng)分兩種情況討論，容易出現(xiàn)的錯(cuò)誤是忽略討論a＋b＋c＝0這種情況.三、板書設(shè)計(jì)比例的性質(zhì)基本性質(zhì)：如果ab＝cd，那么ad＝bc如果ad＝bc（a，b，c，d都不等于0），那么ab＝cd等比性質(zhì)：如果ab＝cd＝…＝mn（b＋d＋…＋n≠0）， 那么a＋c＋…＋mb＋d＋…＋n＝ab經(jīng)歷比例的性質(zhì)的探索過(guò)程，體會(huì)類比的思想，提高學(xué)生探究、歸納的能力.通過(guò)問題情境的創(chuàng)設(shè)和解決過(guò)程進(jìn)一步體會(huì)數(shù)學(xué)與生活的緊密聯(lián)系，體會(huì)數(shù)學(xué)的思維方式，增強(qiáng)學(xué)習(xí)數(shù)學(xué)的興趣.
北師大初中數(shù)學(xué)九年級(jí)上冊(cè)矩形的性質(zhì)1教案
解：∵四邊形ABCD是矩形，∴AD∥BC，∠A＝90°，∴∠2＝∠3.又由折疊知△BC′D≌△BCD，∴∠1＝∠2.∴∠1＝∠3.∴BE＝DE.設(shè)BE＝DE＝x，則AE＝8－x.∵在Rt△ABE中，AB2＋AE2＝BE2，∴42＋(8－x)2＝x2.解得x＝5，即DE＝5.∴S△BED＝12DE·AB＝12×5×4＝10.方法總結(jié)：矩形的折疊問題是常見的問題，本題的易錯(cuò)點(diǎn)是對(duì)△BED是等腰三角形認(rèn)識(shí)不足，解題的關(guān)鍵是對(duì)折疊后的幾何形狀要有一個(gè)正確的分析．三、板書設(shè)計(jì)矩形矩形的定義：有一個(gè)角是直角的平行四邊形 叫做矩形矩形的性質(zhì)四個(gè)角都是直角兩組對(duì)邊分別平行且相等對(duì)角線互相平分且相等經(jīng)歷矩形的概念和性質(zhì)的探索過(guò)程，把握平行四邊形的演變過(guò)程，遷移到矩形的概念與性質(zhì)上來(lái)，明確矩形是特殊的平行四邊形．培養(yǎng)學(xué)生的推理能力以及自主合作精神，掌握幾何思維方法，體會(huì)邏輯推理的思維價(jià)值.
北師大初中數(shù)學(xué)九年級(jí)上冊(cè)正方形的性質(zhì)2教案
1）正方形的邊長(zhǎng)為4cm，則周長(zhǎng)為（ ），面積為（ ） ，對(duì)角線長(zhǎng)為（ ）；2））正方形ABCD中，對(duì)角線AC、BD交于O點(diǎn)，AC=4 cm,則正方形的邊長(zhǎng)為（ ）， 周長(zhǎng)為（ ），面積為（ ）3）在正方形ABCD中，AB=12 cm，對(duì)角線AC、BD相交于O，OA= ,AC= 。4） 1、正方形具有而矩形不一定具有的性質(zhì)是( ) A、四個(gè)角相等 B、對(duì)角線互相垂直平分 C、對(duì)角互補(bǔ) D、對(duì)角線相等. 5）、正方形具有而菱形不一定具有的性質(zhì)（ ） A、四條邊相等 B對(duì)角線互相垂直平分 C對(duì)角線平分一組對(duì)角 D對(duì)角線相等. 6）、正方形對(duì)角線長(zhǎng)6，則它的面積為_________ ,周長(zhǎng)為________． 7）、順次連接正方形各邊中點(diǎn)的小正方形的面積是原正方形面積的（ ）A．1/2 B．1/3 C．1/4 D．1/ 5四：范例講解：1、（課本P21例1）學(xué)生自己閱讀課本內(nèi)容、注意證明過(guò)程的書寫2、 如圖，分別以△ABC的邊AB,AC為一邊向外畫正方形AEDB和正方形ACFG，連接CE,BG.求證：BG=CE
數(shù)據(jù)的整理教案教學(xué)設(shè)計(jì)
一、課前準(zhǔn)備師：同學(xué)們想一想，你同父母一起去商店買衣服時(shí)，衣服上的號(hào)碼都有哪些，標(biāo)志是什么？學(xué)生：我看到有些衣服上標(biāo)有M、S、L、XL、XXL等號(hào)碼．但我不清楚代表的具體范圍，適合什么人穿，但肯定與身高、胖瘦有關(guān)．師：這位同學(xué)很善動(dòng)腦，也愛觀察．S代表最小號(hào)，身高在150~155cm的人適合穿S號(hào)．M號(hào)適合身高在155~160cm的人著裝……廠家做衣服訂尺寸也并不是按所有人的尺寸定做，而是按某個(gè)范圍分組批量生產(chǎn)．你覺得這種生產(chǎn)方法有什么優(yōu)點(diǎn)？學(xué)校要為同學(xué)們訂制校服，為此小明調(diào)查了他們班50名同學(xué)的身高，結(jié)果(單位cm)．如下
小學(xué)數(shù)學(xué)人教版五年級(jí)上冊(cè)《等式的性質(zhì)》說(shuō)課稿
說(shuō)教材>是人教版小學(xué)數(shù)學(xué)五年級(jí)上冊(cè)第五單元P64的內(nèi)容。在學(xué)習(xí)本節(jié)課之前學(xué)生已經(jīng)認(rèn)識(shí)了等式與方程，這便為本節(jié)課的學(xué)習(xí)（構(gòu)建等量關(guān)系的數(shù)學(xué)模型）打下一定的基礎(chǔ)，同時(shí)也為以后解簡(jiǎn)單方程埋下伏筆，因此本節(jié)課內(nèi)容也是本章中的一個(gè)重點(diǎn)。基于本節(jié)內(nèi)容的特點(diǎn)，我將本節(jié)課的教學(xué)目標(biāo)確定為：1.知識(shí)與技能：理解等式的性質(zhì)并用語(yǔ)言表述，能利用等式的性質(zhì)解決簡(jiǎn)單問題；2.過(guò)程與方法：在實(shí)驗(yàn)操作、討論、歸納等活動(dòng)中，經(jīng)歷探究等式基本性質(zhì)的過(guò)程；3.情感態(tài)度與價(jià)值觀：使學(xué)生積極參與數(shù)學(xué)活動(dòng)，體驗(yàn)探索等式基本性質(zhì)的挑戰(zhàn)性與得出數(shù)學(xué)結(jié)論的確定性。教學(xué)重難點(diǎn)：了解等式的基本性質(zhì)，并能簡(jiǎn)單運(yùn)用。說(shuō)學(xué)情：小學(xué)五年級(jí)的學(xué)生已具備一定的思考能力，又樂于動(dòng)手操作、合作探究。因此教學(xué)中我引導(dǎo)學(xué)生認(rèn)真觀察-獨(dú)立思考-自主探究-合作交流，遵循由淺入深，由具體到抽象的規(guī)律，為學(xué)生創(chuàng)設(shè)一個(gè)和諧的學(xué)習(xí)環(huán)境，讓孩子們?cè)谔剿髦薪涣?、感受、理解和概括出等式的基本性質(zhì)。
北師大初中七年級(jí)數(shù)學(xué)下冊(cè)平行線的性質(zhì)教案
解析：平行線中的拐點(diǎn)問題，通常需過(guò)拐點(diǎn)作平行線．解：(1)∠AED＝∠BAE＋∠CDE.理由如下：過(guò)點(diǎn)E作EG∥AB.∵AB∥CD，∴AB∥EG∥CD，∴∠AEG＝∠BAE，∠DEG＝∠CDE.∵∠AED＝∠AEG＋∠DEG，∴∠AED＝∠BAE＋∠CDE；(2)同(1)可得∠AFD＝∠BAF＋∠CDF.∵∠BAF＝2∠EAF，∠CDF＝2∠EDF，∴∠BAE＋∠CDE＝32∠BAF＋32∠CDF，∴∠AED＝32∠AFD.方法總結(jié)：無(wú)論平行線中的何種問題，都可轉(zhuǎn)化到基本模型中去解決，把復(fù)雜的問題分解到簡(jiǎn)單模型中，問題便迎刃而解．三、板書設(shè)計(jì)平行線的性質(zhì)：性質(zhì)1：兩條平行線被第三條直線所截，同位角相等；性質(zhì)2：兩條平行線被第三條直線所截，內(nèi)錯(cuò)角相等；性質(zhì)3：兩條平行線被第三條直線所截，同旁內(nèi)角互補(bǔ)．平行線的性質(zhì)是幾何證明的基礎(chǔ)，教學(xué)中注意基本的推理格式的書寫，培養(yǎng)學(xué)生的邏輯思維能力，鼓勵(lì)學(xué)生勇于嘗試．在課堂上，力求體現(xiàn)學(xué)生的主體地位，把課堂交給學(xué)生，讓學(xué)生在動(dòng)口、動(dòng)手、動(dòng)腦中學(xué)數(shù)學(xué)
北師大初中數(shù)學(xué)九年級(jí)上冊(cè)正方形的性質(zhì)1教案
在Rt△ABC中，AC＝AB2＋BC2＝12＋12＝2(cm)，∴FC＝AC－AF＝2－1(cm)，∴BE＝2－1(cm)．方法總結(jié)：正方形被對(duì)角線分成4個(gè)等腰直角三角形，因此在正方形中解決問題時(shí)常用到等腰三角形的性質(zhì)與直角三角形的性質(zhì)．【類型三】 利用正方形的性質(zhì)證明線段相等如圖，已知過(guò)正方形ABCD的對(duì)角線BD上一點(diǎn)P，作PE⊥BC于點(diǎn)E，PF⊥CD于點(diǎn)F，求證：AP＝EF.解析：由PE⊥BC，PF⊥CD知四邊形PECF為矩形，故有EF＝PC，這時(shí)只需說(shuō)明AP＝CP，由正方形對(duì)角線互相垂直平分可知AP＝CP.證明：連接AC，PC，如圖．∵四邊形ABCD為正方形，∴BD垂直平分AC，∴AP＝CP.∵PE⊥BC，PF⊥CD，∠BCD＝90°，∴四邊形PECF為矩形，∴PC＝EF，∴AP＝EF.方法總結(jié)：(1)在正方形中，常利用對(duì)角線互相垂直平分證明線段相等；(2)無(wú)論是正方形還是矩形，經(jīng)常連接對(duì)角線，這樣可以使分散的條件集中．
【高教版】中職數(shù)學(xué)拓展模塊：3.5《正態(tài)分布》教學(xué)設(shè)計(jì)
教學(xué)目的：理解并熟練掌握正態(tài)分布的密度函數(shù)、分布函數(shù)、數(shù)字特征及線性性質(zhì)。教學(xué)重點(diǎn)：正態(tài)分布的密度函數(shù)和分布函數(shù)。教學(xué)難點(diǎn)：正態(tài)分布密度曲線的特征及正態(tài)分布的線性性質(zhì)。教學(xué)學(xué)時(shí)：2學(xué)時(shí)教學(xué)過(guò)程:第四章 正態(tài)分布§4.1 正態(tài)分布的概率密度與分布函數(shù)在討論正態(tài)分布之前，我們先計(jì)算積分。首先計(jì)算。因?yàn)?利用極坐標(biāo)計(jì)算)所以。記，則利用定積分的換元法有因?yàn)?，所以它可以作為某個(gè)連續(xù)隨機(jī)變量的概率密度函數(shù)。定義 如果連續(xù)隨機(jī)變量的概率密度為則稱隨機(jī)變量服從正態(tài)分布,記作,其中是正態(tài)分布的參數(shù)。正態(tài)分布也稱為高斯（Gauss）分布。
有理數(shù)復(fù)習(xí)教案教學(xué)設(shè)計(jì)
3）乘除運(yùn)算①有理數(shù)的乘法法則：（老師給出，學(xué)生一起朗讀）1. 兩數(shù)相乘，同號(hào)得正，異號(hào)得負(fù)，并把絕對(duì)值相乘；2. 任何數(shù)與零相乘都得零；3. 幾個(gè)不等于零的數(shù)相乘，積的符號(hào)由負(fù)因數(shù)的個(gè)數(shù)決定，當(dāng)負(fù)因數(shù)有奇數(shù)個(gè)數(shù)，積為負(fù)；當(dāng)負(fù)因數(shù)的個(gè)數(shù)為偶數(shù)個(gè)時(shí)，積為正；4. 幾個(gè)有理數(shù)相乘，若其中有一個(gè)為零，積就為零。②有理數(shù)的除法法則：（老師提問，學(xué)生回答）1. 兩個(gè)有理數(shù)相除，同號(hào)得正，異號(hào)得負(fù)，并把絕對(duì)值相除；2. 除以一個(gè)數(shù)等于乘以這個(gè)數(shù)的倒數(shù)。③關(guān)系（老師給出）除法轉(zhuǎn)化為乘法進(jìn)行運(yùn)算。
初中數(shù)學(xué)北京課改版八年級(jí)上冊(cè)《122三角形的性質(zhì)》說(shuō)課稿
一．學(xué)生情況分析對(duì)于三角形的內(nèi)角和定理，學(xué)生在小學(xué)階段已通過(guò)量、折、拼的方法進(jìn)行了合情推理并得出了相關(guān)的推論。在小學(xué)認(rèn)識(shí)三角形，通過(guò)觀察、操作，得到了三角形內(nèi)角和是180°。但在學(xué)生升入初中階段學(xué)習(xí)過(guò)推理證明后，必須明確推理要有依據(jù)，定理必須通過(guò)邏輯證明?，F(xiàn)在的學(xué)生喜歡動(dòng)手實(shí)驗(yàn)，操作能力較強(qiáng)，但對(duì)知識(shí)的歸納、概括能力以及知識(shí)的遷移能力不強(qiáng)。部分優(yōu)秀學(xué)生已具備良好的學(xué)習(xí)習(xí)慣，有一定分析、歸納能力。
