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人教版高中政治必修3我們的民族精神教案
2.弘揚(yáng)和培育中華民族精神，是提高全民族綜合素質(zhì)的必然要求Why：（1）一個(gè)民族的發(fā)展也取決于民族的綜合素質(zhì)（2）民族精神是民族綜合素質(zhì)的有機(jī)組成和集中體現(xiàn)（3）高昂奮進(jìn)的民族精神能產(chǎn)生巨大的力量，發(fā)揮不可估量的作用學(xué)生活動(dòng)：你能舉出生活中民族素質(zhì)有待提高的事例嗎？試著分析一下如何解決。舉例：南京的市罵、中國公民在國外的隨地吐痰、亂扔亂丟現(xiàn)象。3.弘揚(yáng)和培育中華民族精神，是不斷增強(qiáng)我國國際競爭力的要求Why：（1）文化在綜合國力的競爭中的地位和作用越來越突出（2）民族精神作為中華文化的精髓，具有凝聚和動(dòng)員民族力量、展示民族形象的重要功能，已成為表明綜合國力強(qiáng)弱的至關(guān)重要的因素之一學(xué)生活動(dòng)：“憶一憶”文化在綜合國力競爭中具有怎樣的意義？（P11、P22，關(guān)鍵詞：精神武器、深深熔鑄、重要標(biāo)志、智力支持、方向保證、精神動(dòng)力）
人教版高中政治必修3世界文化的多樣性教案
代中國人民的四大發(fā)明，古希臘人的哲學(xué)與藝術(shù)成就，占代印度人民在宗教和數(shù)學(xué)方面的成就等，都以其鮮明的民族特色}：富J，世界文化，共同推動(dòng)了人類社會(huì)的進(jìn)步和發(fā)展?？傊?，尊重和保存不同的民族文化，是人類生存和發(fā)展的基礎(chǔ)。◇課堂探究：(1)對那些面臨失傳的占老民族文化，有人反對進(jìn)行搶救和保護(hù)，認(rèn)為應(yīng)當(dāng)順其自然地讓它們被歷史淘汰。你同意這種看法嗎?(2)你認(rèn)為，我們還有哪些獨(dú)特的文化形式可以申報(bào)人類口述和非物質(zhì)遺產(chǎn)?◇探究提示：(1)文化遺產(chǎn)是一個(gè)民族的“身份證”，從文化意義上標(biāo)識出一個(gè)民族的個(gè)性和一個(gè)民族的歷史記憶。文化遺產(chǎn)是人類社會(huì)發(fā)展的見證，是人類文明的重要載體。文化遺產(chǎn)體現(xiàn)著一個(gè)民族獨(dú)特的思維方式和文化價(jià)值，是民族的根基，是歷史的紀(jì)念碑。文化遺產(chǎn)既屬于一個(gè)國家、一個(gè)民族，也是全人類的共同財(cái)富。文化遺產(chǎn)具有不可再生性的特點(diǎn)，所以對那些面臨失傳的古老民族文化，我們不能坐視不管，要進(jìn)行及時(shí)有效地?fù)尵群捅Ｗo(hù)。
新人教版高中英語必修2Unit 3 The Internet-Discovering Useful Structure教案二
This teaching period mainly deals with grammar “The Present Perfect Passive Voice.” To begin with, teachers should lead students to revise what they have learned about the Present Perfect Passive Voice. And then, teachers move on to stress more special cases concerning this grammar。This period carries considerable significance to the cultivation of students’ writing competence and lays a solid foundation for the basic appreciation of language beauty. The teacher is expected to enable students to master this period thoroughly and consolidate the knowledge by doing some exercises. 1. Guide students to review the basic usages of the Present Perfect Passive Voice2. Lead students to learn to use some special cases concerning the Present Perfect Passive Voice flexibly.2. Enable students to use the basic phrases structures flexibly.3. Strengthen students’ great interest in grammar learning.1. Help students to appreciate the function of the Present Perfect Passive Voice in a sentence2. Instruct students to write essays using the proper the Present Perfect Passive Voice.觀察下列句子特點(diǎn)，總結(jié)共同點(diǎn)。1．(教材P28)Much has been written about the wonders of the World Wide Web．2．(教材P28)But the Internet has done much more for people than simply make life more convenient．3．(教材P28)Many people have been helped by the club．4．(教材P28)She no longer feels lonely, and her company has become quite successful．5．(教材P32)Today I thought I’d blog about a question that has been asked many times—how do you stay safe online and avoid bad experiences on the Internet?
新人教版高中英語必修2Unit 3 The Internet-Listening &Speaking＆Talking教案二
From the pictures in the text and the title--- choose the best app, we can know that this part is about how to save money by using apps.Step 2 While-listening1. Laura and Xiao Bo are talking about apps. Listen to their conversation and find out what apps they want.Xiao Bo is looking for a(n) exercise app to help him get in shape.Laura would like an app for getting rich and another that will make her grades better.2. Listen again. Are the sentences true T or false F?1). Both of Xiao Bo's apps keep track of the steps he takes._____2). Xiao Bo's second app can help him make a fitness plan._____3). Laura needs an app that will help her get discounts.______4). Laura needs an app that will add money to her bank account._______F T F T3. Listen once more and tick the sentence you hear. Underline the words used to express predictions, guesses, and beliefs.Predictions, Guesses, and Beliefs________It might help me walk more.________My guess is that it wouldn't work.________I imagine this app would help me get fit faster________I suppose that would be good.________I guess you could save a little with this app.________I suppose there would be some problems, too.________I believe this app could help me get thinner.
新人教版高中英語必修2Unit 3 The Internet-Listening &Speaking＆Talking教案一
Listening and Speaking introduces the topic of “ask about online habits”. Many middle school students have been surfing the Internet for many years, but what they do with the Internet and how much time they spend every day may not be very clear to themselves, nor to other students. This section allows students to investigate their peers' Internet use, which is conducive to their mutual understanding and understanding of the Internet. It can also help them reflect on their own online behavior, learn from other people's good online habits, and get rid of their bad online behavior.The listening text of this section is an investigation interview. The investigators interview specific groups with the same questions to obtain information, so as to understand their views, practices or attitudes on this issue. There are two specific questions: “how much time do you spend online every day? What do you usually do online?”. The answers of the three respondents provide rich and different information, and achieve the purpose of the investigators. The oral discourse structure of survey interviews generally includes greeting and explaining the purpose of the interview, presenting the interview questions and the respondents' answers. Listening and Talking introduces the theme of “choosing the right application ". Listening text is a conversation between Laura and Xiao Bo. In this part of listening, “oink”； “piggy bank” may cause the students' hearing comprehension limitation. Oink refers to sound word and pig's sound. So, add some oink to my piggy bank is often used to describe "making a little money".1. Guide students to understand the content of listening texts in terms of listening for definitions.2. Cultivate students' ability to define words and understand an investigation interview.
新人教版高中英語必修2Unit 3 The Internet-Reading and Thinking教案二
Q5：What's Jan's next goal?Her next goal is to start a charity website to raise money for children in poor countries.Q6：What can we learn from her experiences?We learn that when we go through tough times, we can find help and support from other people online. We learn that we can feel less lonelyStep 5: While reading---rethinkingQ1: What is Jan’s attitude to the Internet ?Thankful/Grateful, because it has changed her and her life.Q2: What writing skills is used in the article ?Examples(Jan’s example, the 59-year-old man’s and the 61-year-old woman’s example)Q3: Can you get the main idea of the article ?The Internet has changed Jan’s life/Jan’s life has been changed by the Internet.Step 6 Post reading---Retell the storyMuch has been written about the wonders of the World Wide Web. There are countless articles (1)telling(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)more(much) for people than simply make life more convenient. People’s lives (3) have been changed(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)stuck(stick) at home with only her computer to keep (5)her(she) company. She joined an online group (6)where she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)benefits(benefit). She was so inspired (8)that she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)for children in poor countries. Jan’s life has been (10)greatly(great) improved by the Internet.
新人教版高中英語必修2Unit 3 The Internet-Reading and Thinking教案一
Paragraph 3. Jan decided to start an IT club to teach old people how to use computers and the Internet. Paragraph 4. Jan has started taking online classes to learn more about how to use the Internet to make society better. Paragraph 5. Jan’s life has been greatly improved by the Internet. Step 5: Critical thinking:(1)How do you arrange your time spent on study and the Internet? Is it reasonable? I usually surf the Internet using my mobile phone for only an hour after class, and it is reasonable for me.(2)What are your online activities? Are they safe? I chat with my friends, read news and play games. I never give away my private information so I think they are safe.Step 4: summary Much has been written about the wonders of the World Wide Web. There are countless articles (1)______(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)_____(much) for people than simply make life more convenient. People’s lives (3) _________________(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)_____(stick) at home with only her computer to keep (5)___(she) company. She joined an online group (6)______ she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)_______(benefit). She was so inspired (8)____ she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)___ children in poor countries. Jan’s life has been (10)______(great) improved by the Internet. Step 5 Homework:Review what we have learned and find out the key language points in the text.
新人教版高中英語必修2Unit 3 The Internet-Reading for Writing教案二
8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。 Step 8 Writing---the articleHow to stay safe in the online chat roomToday I thought I’d blog about a question that has been asked many times--- how do you stay safe online and avoid bad experiences in the online chat room ? I’m not an expert, but many years as a blogger have taught me a thing or two.First of all, there’s the golden rule of the Internet: keep out of what makes you uneasy. Don’t post comments or click on anything. Second, protect your privacy. Don’t give out too much private information like your address, phone numbers, the ID numbers, etc. Third, be polite. If you are polite to others on the Internet, you won’t be attacked in normal situation. Finally, don’t believe in others easily and never meet someone you met online alone. It is very dangerous.Have you had any bad experiences online, or do you have some good advice for staying safe? Post your comments below!Step 9 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Does the writer tell the reader what he/she know about the topic ?2. Are the tips and suggestions well organised ?3. Has the writer defined the new words ?4. Does the author include examples, comparison, or explanations ?5. Does the writer end by asking readers to leave comments and/or suggestions ?6. Can you find any grammar or spelling mistakes.Step 6 HomeworkPut up your revised draft in the classroom or read it to your class.
新人教版高中英語必修2Unit 3 The Internet-Reading For Writing教案一
⑦identity theft 身份盜竊⑧chat room 聊天室⑨draft your blog post 起草博客帖子⑩post embarrassing photos 張貼尷尬照片 【話題句式】 1. How do you stay safe online and avoid bad experiences on the Internet? 你如何在網(wǎng)上保持安全, 避免在網(wǎng)上的不良經(jīng)歷? 2. I’m not an expert, but many years as a blogger have taught me a thing or two. 我不是專家, 但作為一個(gè)博主, 我已經(jīng)學(xué)了好幾年了。 3. If you see or read something that makes you feel uncomfortable, leave the site immediately. 如果你看到或讀到一些讓你覺得不舒服的東西, 立即離開這個(gè)網(wǎng)站。4. Don’t give out your address or phone number. 別告訴別人你的地址或電話號碼。 5. Identity theft is a common and serious problem. 身份盜竊是一個(gè)常見而嚴(yán)重的問題。6. Being online is no excuse for being rude, and you don’t want to become a target for a troll or cyberbully. 上網(wǎng)并不是無禮的借口, 你也不想成為發(fā)挑釁帖子的人或網(wǎng)絡(luò)惡霸的目標(biāo)。 7. Trolls often use several false names so that they can stay on a site. 發(fā)挑釁帖子的人經(jīng)常使用幾個(gè)假名, 這樣他們就可以留在一個(gè)網(wǎng)站上。8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。
人教版高中語文必修2《蘭亭集序》教案3篇
三、指導(dǎo)第一段的背誦，點(diǎn)撥理解句意，強(qiáng)調(diào)關(guān)鍵詞語，注重文言基礎(chǔ)知識教學(xué)。過程中要讓學(xué)生反復(fù)讀背。背誦線索：時(shí)間——地點(diǎn)——事件——人物——環(huán)境——活動(dòng)——天氣——感覺。時(shí)間：永和九年，歲在癸丑，暮春之初。地點(diǎn)：會(huì)于會(huì)稽山陰之蘭亭。事件：修稧事也。人物：群賢畢至，少長咸集。環(huán)境：此地有崇山峻嶺，茂林修竹；又有清流激湍，映帶左右?；顒?dòng)：引以為流觴曲水，列坐其次。雖無絲竹管弦之盛，一觴一詠，亦足以暢敘幽情。天氣：是日也，天朗氣清，惠風(fēng)和暢。感覺：仰觀宇宙之大，俯察品類之盛，所以極視聽之娛，信可樂也。四、學(xué)生自讀背誦5分鐘。五、抽一至二名學(xué)生試背課文，教師可作必要的線索提示。第二課時(shí)一、聽名家示范朗誦，學(xué)生小聲跟讀。二、復(fù)習(xí)鞏固第一自然段的閱讀背誦。三、朗讀、解析第二自然段，理解文章“由敘入感”的寫作結(jié)構(gòu)。
人教版高中語文必修3《琵琶行 并序》教案
9、在樂曲終了之后，詩人以“東船西舫悄無言，唯見江心秋月白”兩句結(jié)尾，這兩句作用如何？明確：詩人沒有直接寫聽者的熱烈反響以說明琵琶女技藝非凡和樂聲的感人至深，否則過于直白就不含蓄，不含蓄也就顯不出深沉了。用“東船西舫悄無言”的寂靜無聲，反襯“有聲”的音樂效果，可謂“此時(shí)無聲勝有聲”了。人們無聲地沉浸、陶醉在藝術(shù)的享受之中，那深深打動(dòng)人的樂聲仿佛繚繞迂回耳際，不由得使詩人想到了自己浩茫的心事，引起情緒上的波瀾。在這片刻的沉寂中，只見一輪迷蒙的冷月蕩漾在江心的微波之中，它提醒詩人從樂聲中回到現(xiàn)實(shí)中來。這句景物描寫點(diǎn)染烘托了濃重的氛圍，與復(fù)雜的樂聲融為一體，共同表現(xiàn)了琵琶女與詩人息息相通的復(fù)雜情感，是那么的憂憤、哀怨凄楚、蒼涼，給整個(gè)音樂形象補(bǔ)足了畫龍點(diǎn)睛之筆。
人教版高中政治必修3世界文化的多樣性教案
五、課后反思課后組織學(xué)生討論對本課的感受，同學(xué)們都非常樂意采取這種上課方式，既可以通過資料的搜集、整理提高自身信息采集的能力，也能夠提高自己學(xué)習(xí)積極性，變枯燥為生動(dòng)。本人在教學(xué)中也深深地感到：一方面，充分發(fā)揮學(xué)生的主體作用，有利于啟發(fā)同學(xué)的思維，培養(yǎng)自主思考的能力。而充分利用網(wǎng)絡(luò)的教學(xué)功能，將現(xiàn)代信息技術(shù)和學(xué)科教學(xué)很好地結(jié)合了起來。只有調(diào)動(dòng)全體同學(xué)的積極性、主動(dòng)性、創(chuàng)造性，我們的教學(xué)才能有生命力；另一方面，光有學(xué)生的活動(dòng)也不行，雖然學(xué)生能夠積極投入地利用互聯(lián)網(wǎng)搜集并動(dòng)手制作課件，在課堂交流中能很好地進(jìn)行發(fā)散思維和創(chuàng)造性思維，但其集中思維和抽象性思維還存在一定的缺陷，主要體現(xiàn)在對搜集的材料的取舍是以及對知識點(diǎn)的歸納和深化方面，所以在充分發(fā)揮學(xué)生的主體作用的同時(shí)應(yīng)該也必須重視教師主導(dǎo)作用的發(fā)揮，引導(dǎo)學(xué)生由形象到抽象、由發(fā)散到集中、由演繹到歸納的思維能力的逐步提高。
新人教版高中英語必修2Unit 3 The Internet-Discovering Useful Structure教案一
This unit is about the Internet, which has a great influence to our humans and our lives. During the Listening & Speaking & Talking and Reading and Thinking section, the influence in examples has been shown. Thus, use the Present Perfect Tense is appropriate. However, in order to show the justice or weaken the doer of the behavior/action, it’s better to use the Present Perfect Passive Voice than the Present Perfect Tense. Besides, having learned to use the Present Perfect Passive Voice, students can beautify their language in their writing. 1. Learn the structure of the Present Perfect Passive Voice and its functions. 2. Learn to change the sentences with the Present Perfect Passive Voice into the sentences with the Present Perfect Passive Voice. 3. Learn to write sentences with the Present Perfect Passive Voice flexibly according to the context. 1. Learn the structure of the Present Perfect Passive Voice and its functions. 2. Learn to change the sentences with the Present Perfect Passive Voice into the sentences with the Present Perfect Passive Voice. 3. Learn to write sentences with the Present Perfect Passive Voice flexibly according to the context. Step 1 Observe the following sentences, then change the sentences into passive voice.He has been selected to take part in the sports meeting．(肯定句)他已被挑選出來參加運(yùn)動(dòng)會(huì)。The ink has not been removed from his overcoat．(否定句)墨跡還沒有從他外套上去掉。
人教版高中語文《勸學(xué)》教案
(1)吾嘗(曾經(jīng))終日而思矣，不如須臾(片刻)之所學(xué)也；吾嘗肢(踮起腳跟)而望矣，不如登高之博見(看得廣)也。(學(xué)、思對比，強(qiáng)調(diào)了學(xué)習(xí)的作用；跛望與登高對比，登高的收獲大。兩例證明利用學(xué)習(xí)、利用外物的作用。)(2)登高而招(招手)，臂非加長也，而見者(看的人)遠(yuǎn)(遠(yuǎn)也看得見)；順風(fēng)而呼(呼喊)，聲非加疾(快)也，而聞?wù)?聽的人)彰(聽得更清楚)。(兩例證明利用自然條件的作用。)(3)假(借助)輿馬者(的人)，非利足(快腳)也，而致(達(dá)到)千里；假舟楫者，非能水(善游)也，而絕(橫渡)江河。(兩例證明利用工具的作用。)(4)君子生(性)非異也，善假(利用)于(對)物(外物)也。連用比喻，得出結(jié)論：那些有才德的君子，生來本性與普通人沒有什么兩樣(生非異也)，只是由于他善于利用學(xué)得的知識和本領(lǐng)，善于利用處界條件彌補(bǔ)自身的不足，不斷提高自己，所以才成為君子的。
人教版新課標(biāo)小學(xué)數(shù)學(xué)一年級下冊兩位數(shù)減一位數(shù)和整十?dāng)?shù)（不退位）教案
一、教學(xué)內(nèi)容：兩位數(shù)減一位數(shù)和整十?dāng)?shù)（不退位）（課本第67頁）。二、教學(xué)目標(biāo)：1、知識與技能：讓學(xué)生經(jīng)歷探索兩位數(shù)減一位數(shù)和整十?dāng)?shù)（不退位）的計(jì)算方法的過程，掌握計(jì)算方法，能正確地口算。2、過程與方法：讓學(xué)生經(jīng)歷自主探索、動(dòng)手操作、合作交流等方式獲得新知的過程，積累數(shù)學(xué)活動(dòng)的經(jīng)驗(yàn)，體會(huì)數(shù)學(xué)知識與日常生活的密切聯(lián)系，增強(qiáng)應(yīng)用意識。3、情感態(tài)度與價(jià)值觀：進(jìn)一步培養(yǎng)學(xué)生學(xué)習(xí)數(shù)學(xué)的熱情，以及積極思考、動(dòng)手實(shí)踐并與同學(xué)合作學(xué)習(xí)的態(tài)度。三、教學(xué)重點(diǎn)：掌握兩位數(shù)減一位數(shù)和整十?dāng)?shù)（不退位）的口算方法。四、教學(xué)難點(diǎn)：理解算理，把握兩位數(shù)減一位數(shù)與兩位數(shù)減整十位數(shù)在計(jì)算過程中的相同點(diǎn)與不同點(diǎn)。五、教具準(zhǔn)備：課件、題卡、等。六、教學(xué)過程：（一）、創(chuàng)設(shè)情境，提出問題。
人教版高中語文必修3《寡人之于國也》說課稿2篇
（明確：“寡人之于國也，盡心焉耳矣”，但“寡人之民不加多，何也？”）②他認(rèn)為自己對國家政務(wù)盡心盡力了，他有哪些具體做法？（明確：移民移粟）③第2—4節(jié)中孟子是怎樣說明梁惠王移民移粟的措施與“鄰國之政”并無本質(zhì)區(qū)別的？（明確：孟子不直接回答“民不加多”的問題，而是用梁惠王熟悉的“戰(zhàn)”設(shè)喻——設(shè)圈套，誘使對方在不知不覺中說出“不可，直不百步耳，是亦走也?！保苊献诱J(rèn)為怎樣才能做到“王道之始”？要想“王道之成”還需采取哪些措施？（明確：“不違農(nóng)時(shí)，谷不可勝食也。數(shù)罟不入氵夸池，魚鱉不可勝食也。斧斤以時(shí)入山林，材木不可勝用也。谷與魚鱉不可勝食，材木不可勝用五畝之宅，樹之以桑，五十者可以衣帛矣。雞豚狗彘之畜，無失其時(shí)，七十者可以食肉矣。百畝之田，勿奪其時(shí)，數(shù)口之家，可以無饑矣。謹(jǐn)庫序之教，申之以孝涕之義，頒白者不負(fù)戴于道路矣。）這一小步的目的是想讓學(xué)生通過這些問題的解答，可以進(jìn)一步理清思路，掌握文的大概內(nèi)容。
【高教版】中職數(shù)學(xué)基礎(chǔ)模塊上冊：3.2《函數(shù)的性質(zhì)》優(yōu)秀教案
【教學(xué)目標(biāo)】知識目標(biāo)：⑴ 理解函數(shù)的單調(diào)性與奇偶性的概念；⑵ 會(huì)借助于函數(shù)圖像討論函數(shù)的單調(diào)性；⑶理解具有奇偶性的函數(shù)的圖像特征，會(huì)判斷簡單函數(shù)的奇偶性．能力目標(biāo)：⑴ 通過利用函數(shù)圖像研究函數(shù)性質(zhì)，培養(yǎng)學(xué)生的觀察能力；⑵ 通過函數(shù)奇偶性的判斷，培養(yǎng)學(xué)生的數(shù)學(xué)思維能力．【教學(xué)重點(diǎn)】⑴ 函數(shù)單調(diào)性與奇偶性的概念及其圖像特征；⑵ 簡單函數(shù)奇偶性的判定．【教學(xué)難點(diǎn)】函數(shù)奇偶性的判斷．（*函數(shù)單調(diào)性的判斷）【教學(xué)設(shè)計(jì)】（1）用學(xué)生熟悉的主題活動(dòng)將所學(xué)的知識有機(jī)的整合在一起；（2）引導(dǎo)學(xué)生去感知數(shù)學(xué)的數(shù)形結(jié)合思想．通過圖形認(rèn)識特征，由此定義性質(zhì)，再利用圖形（或定義）進(jìn)行性質(zhì)的判斷；（3）在問題的思考、交流、解決中培養(yǎng)和發(fā)展學(xué)生的思維能力．【教學(xué)備品】教學(xué)課件．【課時(shí)安排】3課時(shí)．(90分鐘)【教學(xué)過程】
【高教版】中職數(shù)學(xué)基礎(chǔ)模塊上冊：5.6《三角函數(shù)的圖像和性質(zhì)》優(yōu)秀教案
創(chuàng)設(shè)情景 興趣導(dǎo)入問題 觀察鐘表，如果當(dāng)前的時(shí)間是2點(diǎn)，那么時(shí)針走過12個(gè)小時(shí)后，顯示的時(shí)間是多少呢？再經(jīng)過12個(gè)小時(shí)后，顯示的時(shí)間是多少呢？．解決每間隔12小時(shí)，當(dāng)前時(shí)間2點(diǎn)重復(fù)出現(xiàn)．推廣類似這樣的周期現(xiàn)象還有哪些？ 動(dòng)腦思考 探索新知概念 對于函數(shù)，如果存在一個(gè)不為零的常數(shù)，當(dāng)取定義域內(nèi)的每一個(gè)值時(shí),都有,并且等式成立，那么，函數(shù)叫做周期函數(shù)，常數(shù)叫做這個(gè)函數(shù)的一個(gè)周期． 由于正弦函數(shù)的定義域是實(shí)數(shù)集R，對，恒有，并且，因此正弦函數(shù)是周期函數(shù)，并且 ，， ，及，，都是它的周期．通常把周期中最小的正數(shù)叫做最小正周期，簡稱周期，仍用表示．今后我們所研究的函數(shù)周期，都是指最小正周期．因此，正弦函數(shù)的周期是．
【高教版】中職數(shù)學(xué)基礎(chǔ)模塊上冊：5.7《已知三角函數(shù)值求角》優(yōu)秀教案
【教學(xué)目標(biāo)】知識目標(biāo)：（1）掌握利用計(jì)算器求角度的方法；（2）了解已知三角函數(shù)值，求指定范圍內(nèi)的角的方法．能力目標(biāo)：（1）會(huì)利用計(jì)算器求角；（2）已知三角函數(shù)值會(huì)求指定范圍內(nèi)的角；（3）培養(yǎng)使用計(jì)算工具的技能．【教學(xué)重點(diǎn)】已知三角函數(shù)值，利用計(jì)算器求角；利用誘導(dǎo)公式求出指定范圍內(nèi)的角．【教學(xué)難點(diǎn)】已知三角函數(shù)值，利用計(jì)算器求指定范圍內(nèi)的角．【教學(xué)設(shè)計(jì)】（1）精講已知正弦值求角作為學(xué)習(xí)突破口；（2）將余弦、正切的情況作類比讓學(xué)生小組討論，獨(dú)立認(rèn)知學(xué)習(xí)；（3）在練習(xí)——討論中深化、鞏固知識，培養(yǎng)能力；（4）在反思交流中，總結(jié)知識，品味學(xué)習(xí)方法．【教學(xué)備品】教學(xué)課件．【課時(shí)安排】2課時(shí)．(90分鐘)【教學(xué)過程】 教 學(xué) 過 程教師 行為學(xué)生 行為教學(xué) 意圖時(shí)間 *揭示課題 5.7已知三角函數(shù)值求角 *構(gòu)建問題探尋解決 問題 已知一個(gè)角，利用計(jì)算器可以求出它的三角函數(shù)值， 利用計(jì)算器，求= (精確到0.0001)： 反過來，已知一個(gè)角的三角函數(shù)值，如何求出相應(yīng)的角？ 解決 準(zhǔn)備計(jì)算器．觀察計(jì)算器上的按鍵并閱讀相關(guān)的使用說明書．小組內(nèi)總結(jié)學(xué)習(xí)已知三角函數(shù)值，利用計(jì)算器求出相應(yīng)的角的方法． 利用計(jì)算器求出x：，則x= 歸納 計(jì)算器的標(biāo)準(zhǔn)設(shè)定中，已知正弦函數(shù)值，只能顯示出?90°~ 90°（或）之間的角． 介紹 質(zhì)疑 提問 引導(dǎo) 說明 了解 思考 動(dòng)手 操作 探究 利用 問題 引起 學(xué)生 的好 奇心 并激 發(fā)其 獨(dú)立 尋求 計(jì)算 器操 作的 欲望 10
小學(xué)語文五年級上冊第1課《草原》優(yōu)秀教案范文
初讀課文，學(xué)習(xí)字詞?！ ?.提出讀書要求：默讀課文，一邊讀一邊畫出不認(rèn)識的字和不理解的詞，并借助詞典等學(xué)習(xí)工具書理解。 2.教師檢查學(xué)生學(xué)習(xí)情況?！ 。?）檢查生字讀音。 小丘（ qiū）渲染（xuàn ）迂回（ yū）蒙古包（ měng ） 襟飄帶舞（ jīn ）鄂溫克（è） ?。?）指導(dǎo)易混淆的字?！ 敖蟆笔亲笥医Y(jié)構(gòu)，左邊是“衤”，與衣服有關(guān)，表示衣服胸前的部分。 “澀”是左右結(jié)構(gòu)，右邊下面是“止”，不能寫成“上”?！ 吧选毕旅媸恰耙隆保c衣服有關(guān)。 “微”：中間部分不能少一橫。 ?。?）理解較難的詞語?！ 、俾?lián)系上下文理解詞語。 草原上行車十分灑脫，只要方向不錯(cuò)，怎么走都可以?！ 盀⒚摗钡囊馑际牵簽t灑自然，不拘束。這個(gè)詞語反映了草原的廣闊無邊?！ 、诶斫狻敖箫h帶舞”一詞的意思，可以出示蒙古族鮮艷的服裝來分析，意思是：衣襟和裙帶隨風(fēng)舞動(dòng)。 ?、邸按渖鳌币辉~可以從難字入手理解，比如“欲”在這里表示“將要”的意思，“翠色欲流”就是綠得太濃了，將要流下來，寫出了草原的綠，是充滿生命力的?！ 、芏鯗乜耍何覈贁?shù)民族之一，聚居在內(nèi)蒙古自治區(qū)的東北部。
