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人教版新課標(biāo)高中物理必修1勻變速直線運(yùn)動(dòng)的位移與時(shí)間的關(guān)系說課稿2篇
培養(yǎng)學(xué)生合作交流意識(shí)和探究問題的能力，這一部分知識(shí)層層遞進(jìn)，符合學(xué)生由特殊到一般、由簡(jiǎn)單到復(fù)雜的認(rèn)知規(guī)律。4、互動(dòng)探究(1)極限思想的滲透讓學(xué)生閱讀“思考與討論”小版塊.培養(yǎng)學(xué)生的自學(xué)和閱讀能力提出下列問題，進(jìn)行分組討論：a、用課本上的方法估算位移，其結(jié)果比實(shí)際位移大還是?。繛槭裁?？b、為了提高估算的精確度，時(shí)間間隔小些好還是大些好？為什么？針對(duì)學(xué)生回答的多種可能性加以評(píng)價(jià)和進(jìn)一步指導(dǎo)。讓學(xué)生從討論的結(jié)果中歸納得出：△t越小，對(duì)位移的估算就越精確。滲透極限的思想。通過小組內(nèi)分工合作，討論交流，培養(yǎng)學(xué)生交流合作的精神，以及搜集信息、處理信息的能力；通過小組間對(duì)比總結(jié)，使學(xué)生學(xué)會(huì)在對(duì)比中發(fā)現(xiàn)問題，在解決問題過程中提高個(gè)人能力；
人教版新課標(biāo)高中物理必修1勻變速直線運(yùn)動(dòng)的速度與時(shí)間的關(guān)系說課稿2篇
設(shè)計(jì)意圖：幾道例題及練習(xí)題，其中例1小車由靜止啟動(dòng)開始行駛，以加速度 做勻加速運(yùn)動(dòng)，求2s后的速度大小？進(jìn)而變式到：小車遇到紅燈剎車……，充分體現(xiàn)了“從生活到物理，從物理到社會(huì)”的物理教學(xué)理念；例題及練習(xí)題由淺入深、由易到難、各有側(cè)重，體現(xiàn)新課標(biāo)提出的讓不同的學(xué)生在物理上得到不同發(fā)展的教學(xué)理念。這一環(huán)節(jié)總的設(shè)計(jì)意圖是反饋教學(xué)，內(nèi)化知識(shí)。(6) 小結(jié)歸納，拓展深化我的理解是，小結(jié)歸納不應(yīng)該僅僅是知識(shí)的簡(jiǎn)單羅列，而應(yīng)該是優(yōu)化認(rèn)知結(jié)構(gòu)，完善知識(shí)體系的一種有效手段，為充分發(fā)揮學(xué)生的主題作用，從學(xué)習(xí)的知識(shí)、方法、體驗(yàn)是那個(gè)方面進(jìn)行歸納，我設(shè)計(jì)了這么三個(gè)問題：① 通過本節(jié)課的學(xué)習(xí)，你學(xué)會(huì)了哪些知識(shí)；② 通過本節(jié)課的學(xué)習(xí)，你最大的體驗(yàn)是什么；③ 通過本節(jié)課的學(xué)習(xí)，你掌握了哪些學(xué)習(xí)物理的方法？
第二周國(guó)旗下講話稿：發(fā)揚(yáng)宏志精神，實(shí)現(xiàn)青春跨越
老師們，同學(xué)們，大家好！今天我國(guó)旗下講話的題目是《發(fā)揚(yáng)宏志精神，實(shí)現(xiàn)青春跨越》。XX年9月，宏志班在xx市xx實(shí)驗(yàn)中學(xué)創(chuàng)立了。從那時(shí)起到今天，歷經(jīng)三年時(shí)光，自強(qiáng)不息的田中人用青春和汗水換來了宏志大樹的剛健與挺拔，鑄就了xx中學(xué)今日的豐碩與芬芳。特別是XX年、XX年兩年中考，宏志班的同學(xué)取得了優(yōu)異的成績(jī)，有90多名宏志生錄取到四星級(jí)高中，圓滿的完成了教育局下達(dá)的揚(yáng)中、附中指標(biāo)，這些數(shù)據(jù)不斷刷新著田中教學(xué)質(zhì)量的新高度，贏得了家長(zhǎng)、社會(huì)的刮目相看和高度贊譽(yù)。喜人的成績(jī)面前，我們追尋原因：到底是什么讓田中學(xué)子不斷書寫美麗的傳奇？我想：應(yīng)該就是宏志精神。什么是宏志精神呢？宏志精神的核心就是“自強(qiáng)、勤奮、感恩”?！兑捉?jīng)》中說：“天行健，君子以自強(qiáng)不息”。古往今來，成就大事之人，都是自強(qiáng)之人。勾踐臥薪嘗膽，實(shí)現(xiàn)了“三千越軍可吞吳”的壯舉；祖逖聞雞起舞，贏得了東晉軍事家的美名；曹雪芹披閱十載，增刪五次，鑄就了《紅樓夢(mèng)》的絕世經(jīng)典。人生的道路漫長(zhǎng)而又精彩：我們要學(xué)會(huì)在陽光中歡笑，在陰霾中堅(jiān)強(qiáng)，在狂風(fēng)中抓緊希望，在暴雨中堅(jiān)守理想；自強(qiáng)不息，樂觀向上，走出一條屬于自己的人生之路。
第十二周國(guó)旗下講話稿：冬季長(zhǎng)跑，讓健康與我同行
第十二周國(guó)旗下講話：冬季長(zhǎng)跑，讓健康與我同行尊敬的老師、親愛的同學(xué)們：大家好！我是高一15班的雷xx。今天我國(guó)旗下講話的題目是：冬季長(zhǎng)跑，讓健康與我同行。在這個(gè)金桔飄香的季節(jié)里，同學(xué)們，你們是否聽見了冬天的腳步在向我們臨近？隨著冬天的到來，皮膚干燥、飲食減少、傷風(fēng)感冒等各種疾病也隨之而來。我想從此時(shí)開始，我們?nèi)熒鷳?yīng)該樹立起“健康第一”的觀念，享受陽光下美好的時(shí)光，利用好這些時(shí)間積極投身體育活動(dòng)，強(qiáng)健我們的體魄。為此，我對(duì)深入持久的開展陽光體育冬季長(zhǎng)跑提出以下幾點(diǎn)希望：一、在活動(dòng)中加強(qiáng)“誠(chéng)信”的自我教育，提高自我鍛煉意識(shí)和參與意識(shí)，促進(jìn)學(xué)校體育活動(dòng)健康積極發(fā)展。二、條件受限形式可變，長(zhǎng)跑并非是唯一的鍛煉方式，同學(xué)們要結(jié)合實(shí)際情況，開展形式多樣的體育活動(dòng)，關(guān)鍵在于運(yùn)動(dòng)。
人教版高中數(shù)學(xué)選修3排列與排列數(shù)教學(xué)設(shè)計(jì)
4.有8種不同的菜種,任選4種種在不同土質(zhì)的4塊地里,有 種不同的種法. 解析:將4塊不同土質(zhì)的地看作4個(gè)不同的位置,從8種不同的菜種中任選4種種在4塊不同土質(zhì)的地里,則本題即為從8個(gè)不同元素中任選4個(gè)元素的排列問題,所以不同的種法共有A_8^4 =8×7×6×5=1 680(種).答案:1 6805.用1、2、3、4、5、6、7這7個(gè)數(shù)字組成沒有重復(fù)數(shù)字的四位數(shù).(1)這些四位數(shù)中偶數(shù)有多少個(gè)?能被5整除的有多少個(gè)?(2)這些四位數(shù)中大于6 500的有多少個(gè)?解:(1)偶數(shù)的個(gè)位數(shù)只能是2、4、6,有A_3^1種排法,其他位上有A_6^3種排法,由分步乘法計(jì)數(shù)原理,知共有四位偶數(shù)A_3^1·A_6^3=360(個(gè));能被5整除的數(shù)個(gè)位必須是5,故有A_6^3=120(個(gè)).(2)最高位上是7時(shí)大于6 500,有A_6^3種,最高位上是6時(shí),百位上只能是7或5,故有2×A_5^2種.由分類加法計(jì)數(shù)原理知,這些四位數(shù)中大于6 500的共有A_6^3+2×A_5^2=160(個(gè)).
人教版高中數(shù)學(xué)選修3組合與組合數(shù)教學(xué)設(shè)計(jì)
解析:因?yàn)闇p法和除法運(yùn)算中交換兩個(gè)數(shù)的位置對(duì)計(jì)算結(jié)果有影響,所以屬于組合的有2個(gè).答案:B2.若A_n^2=3C_(n"-" 1)^2,則n的值為( )A.4 B.5 C.6 D.7 解析:因?yàn)锳_n^2=3C_(n"-" 1)^2,所以n(n-1)=(3"(" n"-" 1")(" n"-" 2")" )/2,解得n=6.故選C.答案:C 3.若集合A={a1,a2,a3,a4,a5},則集合A的子集中含有4個(gè)元素的子集共有 個(gè). 解析:滿足要求的子集中含有4個(gè)元素,由集合中元素的無序性,知其子集個(gè)數(shù)為C_5^4=5.答案:54.平面內(nèi)有12個(gè)點(diǎn),其中有4個(gè)點(diǎn)共線,此外再無任何3點(diǎn)共線,以這些點(diǎn)為頂點(diǎn),可得多少個(gè)不同的三角形?解:(方法一)我們把從共線的4個(gè)點(diǎn)中取點(diǎn)的多少作為分類的標(biāo)準(zhǔn):第1類,共線的4個(gè)點(diǎn)中有2個(gè)點(diǎn)作為三角形的頂點(diǎn),共有C_4^2·C_8^1=48(個(gè))不同的三角形;第2類,共線的4個(gè)點(diǎn)中有1個(gè)點(diǎn)作為三角形的頂點(diǎn),共有C_4^1·C_8^2=112(個(gè))不同的三角形;第3類,共線的4個(gè)點(diǎn)中沒有點(diǎn)作為三角形的頂點(diǎn),共有C_8^3=56(個(gè))不同的三角形.由分類加法計(jì)數(shù)原理,不同的三角形共有48+112+56=216(個(gè)).(方法二 間接法)C_12^3-C_4^3=220-4=216(個(gè)).
新人教版高中英語必修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.
新人教版高中英語必修3Unit 4 Space Exploration-Listening&Speaking＆Talking教學(xué)設(shè)計(jì)二
The themes of this part are “Talk about how to become an astronaut” and “Talk about life in space”. As Neil Armstrong said “Mystery creates wonder and wonder is the basis of man’s desire to understand. Space is difficult for human to reach, therefore, humans are full of wonders about it. However, if wanting to achieve the dream of reaching the Moon, some of our human should work hard to be an astronaut at first. Part A(Talk about how to become an astronaut) is a radio interview in a radio studio, where the host asked the Chinese astronauts about his story how to become an astronaut. Yang Liwei told his dreamed to be an astronaut since childhood. Then he worked hard to get into college at 22. The next 10 years, he gradually became an experienced pilot. At the same time, to be an astronaut, he had to study hard English, science and astronomy and trained hard to keep in good physical and mental health and to practise using space equipment. Part B (Talk about life in space) is also an interview with the astronaut Brown, who is back on the earth. The host Max asked about his space life, such as his emotion about going back the earth, the eating, shower, brushing, hobbies and his work. Part A and Part B are interviews. So expressing curiosity about the guests’ past life is a communicative skill, which students should be guided to learn.1. Students can get detailed information about how Yang Liwei became an astronaut and Max’s space life.2. Students learn to proper listening strategy to get detailed information---listening for numbers and taking notes.3. Students can learn related sentences or phrases to express their curiosity like “ I wish to know...” “I’d love to know...”4. Students can learn more about the space and astronauts, even be interested in working hard to be an astronaut
新人教版高中英語必修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?
新人教版高中英語必修3Unit 4 Space Exploration-Reading for Writing教學(xué)設(shè)計(jì)二
⑦在我看來, 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. 無論什么時(shí)候, 只要您想回來就回來。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 ?
小班數(shù)學(xué)教案：花兒朵朵（3以內(nèi)數(shù)量）
2、在觀察圖片和提問的引導(dǎo)下，探索用點(diǎn)卡表示實(shí)物的數(shù)量。 3、喜愛參加數(shù)學(xué)活動(dòng)，體驗(yàn)活動(dòng)的樂趣?！ ?活動(dòng)準(zhǔn)備： 1、教具——花的圖片6張，其中數(shù)量為1、2、3的花朵兩張； ——1、2、3、的點(diǎn)卡片各一張，分類和底板。 2、學(xué)具——操作材料人手一套實(shí)物和點(diǎn)卡操作圖片，分類盒人手一個(gè)。 活動(dòng)過程： 一、 感知圖片數(shù)量，認(rèn)識(shí)點(diǎn)子標(biāo)記?！ ?1、師：小朋友看這兒有什么？每張圖片上有幾朵花？我們一起來數(shù)一數(shù)好嗎？
幼兒園大班數(shù)學(xué)活動(dòng)說課稿 認(rèn)識(shí)時(shí)鐘
幼兒園數(shù)學(xué)是一門系統(tǒng)性、邏輯性很強(qiáng)的學(xué)科，有著自身的特點(diǎn)和規(guī)律，密切聯(lián)系幼兒的生活，結(jié)合幼兒生活實(shí)際和知識(shí)經(jīng)驗(yàn)來設(shè)計(jì)數(shù)學(xué)活動(dòng)。時(shí)間無直觀形象是較為籠統(tǒng)的因此，運(yùn)用了幼兒較熟悉的一日活動(dòng)的作息時(shí)間，引導(dǎo)幼兒認(rèn)識(shí)整點(diǎn)、半點(diǎn)，如： 8 00 入園， 3 30 離園 … 這樣易引起幼兒的情緒體驗(yàn)，為其理解和接受。根據(jù)教材內(nèi)容和幼兒的實(shí)際情況，制訂出本次活動(dòng)的教學(xué)為：1 ．使幼兒認(rèn)識(shí)時(shí)鐘，能叫出名稱，基本掌握鐘面的主要結(jié)構(gòu)。2 使幼兒知道時(shí)針、分針、以及它之間的運(yùn)轉(zhuǎn)關(guān)系，能正確識(shí)別整點(diǎn)、半點(diǎn)。3 培養(yǎng)幼兒的觀察力和操作能力，使幼兒建立初步的時(shí)間概念。
幼兒園中班數(shù)學(xué)教案：學(xué)習(xí)4的加減法
2、獨(dú)立將三幅圖連起來，表達(dá)其中的含義，運(yùn)用正確的詞匯表達(dá)圖意。 3、敢于克服膽怯的心理，大膽回答問題。活動(dòng)準(zhǔn)備：1、教具：有關(guān)4的減法圖三幅?！ ?2、學(xué)具：幼兒用書，鉛筆?；顒?dòng)過程：1、集體活動(dòng)?！ ?（1）游戲“看誰說得快”?！ ?教師提出要與幼兒玩游戲，隨后講一講游戲規(guī)則：教師說一個(gè)數(shù)字，請(qǐng)幼兒說出它后面的一個(gè)數(shù)字。教師報(bào)數(shù)，全體幼兒嘗試回答，當(dāng)全體幼兒玩的比較熟練后，可以與小組的幼兒玩?！ ?教師說出游戲的另一個(gè)規(guī)則：教師說一個(gè)數(shù)字，幼兒說出它前面的一個(gè)數(shù)字。教師報(bào)數(shù)，全體幼兒嘗試回答。
大班數(shù)學(xué)教案：仿編5以內(nèi)的加法應(yīng)用題
活動(dòng)準(zhǔn)備： 1、5以內(nèi)加法算式卡片若干張，加法圖片若干張，口述圖片5張?！ ?2、紅、黃、綠隊(duì)牌三張、搶答器（鑼）三個(gè)，數(shù)字貼紙（選手號(hào)）若干張、統(tǒng)計(jì)牌一個(gè)，獎(jiǎng)牌榜三張、 3、紅蘋果若干個(gè)、獎(jiǎng)狀若干張、頒獎(jiǎng)音樂一首?！ 』顒?dòng)過程： 一、引題 1、師：大家好，歡迎你們來到快樂數(shù)學(xué)大本營(yíng)，我是快樂數(shù)學(xué)欄目主持人——小問號(hào)。我們快樂數(shù)學(xué)大本營(yíng)的口號(hào)是：快樂數(shù)學(xué)，快樂無限！我們現(xiàn)在整齊、響亮地把口號(hào)喊出來：快樂數(shù)學(xué)，快樂無限！ye! 首先我來介紹今天參加我們快樂數(shù)學(xué)大本營(yíng)的三個(gè)方隊(duì)，他們是（舉隊(duì)牌）——紅隊(duì)，歡迎你們！他們是——黃隊(duì)，歡迎你們！他們是——綠隊(duì)，歡迎你們！接下來我們馬上進(jìn)入快樂數(shù)學(xué)第一關(guān)?！ 《⒖鞓窋?shù)學(xué)第一關(guān)。 1、師：第一關(guān)：必答題。紅黃綠隊(duì)的每一位選手都要回答一道題目，每答對(duì)一題，獎(jiǎng)勵(lì)一個(gè)紅蘋果。看哪一隊(duì)的紅蘋果個(gè)數(shù)最多。 2、師：答題開始。請(qǐng)聽題3+3=？（教師請(qǐng)三位選手輪流回答，提醒幼兒把題讀完整），例幼兒：2+3=5 師：（出示正確答案）回答正確。（三位選手依此回答完畢）。
人教A版高中數(shù)學(xué)必修一兩角和與差的正弦、余弦和正切公式教學(xué)設(shè)計(jì)（2）
本節(jié)內(nèi)容是三角恒等變形的基礎(chǔ)，是正弦線、余弦線和誘導(dǎo)公式等知識(shí)的延伸，同時(shí)，它又是兩角和、差、倍、半角等公式的“源頭”。兩角和與差的正弦、余弦、正切是本章的重要內(nèi)容，對(duì)于三角變換、三角恒等式的證明和三角函數(shù)式的化簡(jiǎn)、求值等三角問題的解決有著重要的支撐作用。 課程目標(biāo)1、能夠推導(dǎo)出兩角和與差的正弦、余弦、正切公式并能應(yīng)用; 2、掌握二倍角公式及變形公式，能靈活運(yùn)用二倍角公式解決有關(guān)的化簡(jiǎn)、求值、證明問題．?dāng)?shù)學(xué)學(xué)科素養(yǎng)1.數(shù)學(xué)抽象：兩角和與差的正弦、余弦和正切公式； 2.邏輯推理： 運(yùn)用公式解決基本三角函數(shù)式的化簡(jiǎn)、證明等問題；3.數(shù)學(xué)運(yùn)算：運(yùn)用公式解決基本三角函數(shù)式求值問題.4.數(shù)學(xué)建模：學(xué)生體會(huì)到一般與特殊，換元等數(shù)學(xué)思想在三角恒等變換中的作用。.
二年級(jí)國(guó)旗下講話稿
國(guó)旗是國(guó)家的象征和標(biāo)志，每一位公民都應(yīng)當(dāng)尊重和愛護(hù)國(guó)旗。下面是小編為大家推薦二年級(jí)國(guó)旗下講話稿的內(nèi)容，希望能夠幫助到你，歡迎大家的閱讀參考。二年級(jí)國(guó)旗下講話稿：新學(xué)期致詞 邁著輕盈的步伐，沐浴3月的陽光，在這播種的的季節(jié)里，我們又迎來了播種希望的新學(xué)年。也許，昨天的你擁有許多輝煌，但那已成為了一段甜蜜的回憶；也許，過去的你遇到無數(shù)挫折，但那已是幾滴消失了的苦澀淚痕。讓我們忘記從前的成功與失敗，只把收獲的寶貴經(jīng)驗(yàn)與教訓(xùn)銘刻在心。正如面對(duì)一個(gè)盛著半杯水的杯子，悲觀的人永遠(yuǎn)說它是半空的，而樂觀的人則會(huì)說它是半滿的。不同的心態(tài)決定了我們對(duì)待生活，對(duì)待學(xué)習(xí)的態(tài)度。新學(xué)年，換一種心態(tài)，學(xué)習(xí)生活將是一方艷陽天。業(yè)精于勤荒于嬉。同學(xué)們，我們要想取得好成績(jī)，勤奮是必不可少的，也是最為重要的。魯迅先生曾說過：“哪里有天才？我只是把別人喝咖啡的工夫都用在工作上了?！笨鬃油砟昕础吨芤住窌r(shí)，穿書簡(jiǎn)的皮繩不知磨斷了多少次！唐代詩人白居易幼年好學(xué)，勤奮不懈，年僅16歲就寫出了“野火燒不盡，春風(fēng)吹又生“的千古絕句。勤奮不一定會(huì)成功，但成功肯定以勤奮為基礎(chǔ)。瑯瑯書聲是我們獻(xiàn)給太陽的禮贊，晶瑩露珠是我們迎接日出的問候。不斷追求心中的夢(mèng)想，不斷振奮克服困難的勇氣和決心，經(jīng)受風(fēng)雨，勇往直前，只有這樣，我們才能夠響亮地回答：我們沒有虛度時(shí)光。
大班數(shù)學(xué)教案：認(rèn)識(shí)序數(shù)
2、掌握序數(shù)詞，會(huì)用第幾準(zhǔn)確地表示物體在序列中的位置。認(rèn)真聽清楚各項(xiàng)活動(dòng)的規(guī)則，用過的物品能歸還原處。材料準(zhǔn)備：1、幼兒人手一本《幼兒園課程指導(dǎo).數(shù)學(xué)》。2、小黑板一塊，粉筆若干。投影儀活動(dòng)過程：
第九周國(guó)旗下講話稿：辛勤的贊歌
老師、同學(xué)們：大家早上好：長(zhǎng)亭外，古道邊，芳草碧連天，是一種人生。憑欄處，瀟瀟雨歇，也是一種人生。到中流擊水，浪遏飛舟又是一種人生。有一種美，令人驚艷，令人回味，令人追求，這是一種可以吸引目光的美，它——光彩奪目，有一種美，飄逸在浮云上，深埋在故壘下，這是一種可以吸引靈魂的美，它——深藏不露，有一種美，給生命帶來激情，給生命帶來溫馨，這種美就是辛勤之美。而宿舍值班員，您的人生是默默無聞，是無私奉獻(xiàn)，您的辛勤勞動(dòng)猶如咖啡里的方糖，淳香濃郁，把我們中學(xué)生活調(diào)劑得有滋有味，您的辛勤勞動(dòng)猶如路旁的一道風(fēng)景，把我們的人生裝飾的亮麗多彩。不知道多少次，同學(xué)們半夜趕回宿舍，宿舍門已鎖，是值班員毫無怨言地給我們開門。不知道多少次，宿舍外垃圾成山，是值班員拿著工具給我們清理。不知道多少次，放假時(shí)，值班員送我們的離去，雖然沒有說一句話，但那眼神我們每一個(gè)人都懂。