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人教版高中語(yǔ)文必修3《馬嵬（其二）》教案2篇
結(jié)合歷史自古以來(lái)，江山美人歷來(lái)都是引無(wú)數(shù)英雄豪杰競(jìng)折腰的，如果說(shuō)英雄選擇了美人卻丟了江山，把所有罪名都?xì)w結(jié)于“女人是禍水”。但是，紂王無(wú)道，和有了妲己有必然的聯(lián)系嗎？有人說(shuō)妲己壞透了，壞透了的妲己如果不是取得紂王的信任是壞不起來(lái)的，紂王聽(tīng)信了妲己的讒言，聽(tīng)與不聽(tīng)決定權(quán)在紂王，而不在妲己。強(qiáng)勢(shì)永遠(yuǎn)在紂王一邊。再來(lái)看看西施和楊貴妃：西施是作為越國(guó)貢獻(xiàn)給吳國(guó)的供品來(lái)到吳王夫差的身邊的，楊貴妃更是先是李隆基的兒媳婦被看中而得寵的。所以，西施和楊貴妃這兩個(gè)可憐的女人根本沒(méi)有自己的獨(dú)立選擇，沒(méi)有獨(dú)立的愛(ài)情，如果沒(méi)有西施，就會(huì)有南施，或北施；如果沒(méi)有楊貴妃，就會(huì)有李貴妃，王貴妃，總之什么施，什么妃是不能少的，因?yàn)槟鞘菂峭鹾屠盥』男枰?/p>
新人教版高中英語(yǔ)必修2Unit 1 Cultural Heritage-Discovering Useful Structure教案二
This theme of the part is “ Describe people or things in greater detail”. Students have learned the grammar(restrictive relative clauses) in Book 1, and further review and consolidate its structure “prep+relative pronouns(which/whom)” and the relative adverbs(when, where and why), besides students should understand its form, meaning and functions. In this section, students should be able to express the grammar correctly in daily communication and in the writing. 1. Review the basic usages of relative pronouns and adverbs of attributive clauses . 2. Learn to use some special cases about restrictive relative clauses.3. Learn to write sentences with restrictive relative clauses flexibly according to the context.1. Review the basic usages of relative pronouns and adverbs of attributive clauses .2. Learn to use some special cases about restrictive relative clauses.3. Learn tow rite sentences with restrictive relative clauses flexibly according to the context.Step 1. Observe the following sentences, and mark the relative pronouns and the adverbs. 1. After listening to the scientists who had studied the problems, and citizens who lived near the dam, the government turned to the United Nations for help.2. Temples and other cultural sites were taken down piece by piece, and then moved and put back together again in a place where they were safe from the water.Step 2 PracticePlease complete these sentences with relative pronouns and relative adverbs and answer the following questions.Questions: 1. What is the head noun ?2. What relative words should be used ?3. What elements do they act in these sentences ?
新人教版高中英語(yǔ)必修2Unit 2 Wildlife Protection-Reading for Writing教案二
This lesson aims at making a poster about protecting wildlife after reading some posters. During reading students are guided to understand the content and try to summarize the posters with one sentence. Then students are guided to try to make a poster about protecting wildlife.1. Read the two posters and try to understand the summary sentences.2. Look at the two posters and try to understand what emotions they express.3. Try to summarize the features of posters4. Try to make a poster about wildlife.1. Look at the two posters and try to understand what emotions they express.2. Try to summarize the features of posters3. Try to make a poster about wildlife.Step 1 Lead inLook at the the posters on the textbook and ask:Which emotions do the posters communicate ?Step 2 Read the poster and answer the questions.1. What do you think of the animals in the poster on the left ?I think it is frightening and ugly.2. Why do we should protect the ugly animals ?All species--the good, the bad, and the ugly-- should be treated equally.The world needs all kinds--without variety, our planet cannot survive.3. Why are billions of trees being cut down every year ?To make paper for humans.4. What result will be lead to after the trees are cut down ?A lost of animal homes are being destroyed./The habitat of wildlife is being destroyed.Step 3 Find the feature of posters1. What does each poster use to stir up emotions ?On the left, it makes us a little frightened and it looks a little ugly, but it can activate our curiosity--What is it? And What is wrong with it?On the right, it makes us feel a little sad and want to protect them.
新人教版高中英語(yǔ)必修2Unit 1 Cultural Heritage-Reading and Thinking教案二
1. This section focuses on "Understanding how a problem was solved”, which is aimed to guide students to analyze and discuss the challenges and problems faced by cultural heritage protection during the construction of Aswan Dam, as well as the solutions. On the basis of understanding, students should pay attention to the key role of international cooperation in solving problems, and attach importance to the balance and coordination between cultural heritage protection and social and economic development. Students are encouraged to face challenges actively, be good at cooperation, and make continuous efforts to find reasonable ways and means to solve problems.2. Enable students to understand the main information and text structure of the reading text;3. Motivate students to use the reading strategy "make a timeline" according to the appropriate text genre;4. Enable students to understand how a problem was solved;5. Enable students to understand the value of protecting cultural heritage by teamwork and global community;1. Guide students to pay attention to reading strategies, such as prediction, self-questioning and scanning.2. Help students sort out the topic language about protecting cultural relics and understand the narrative characteristics of "time-event" in illustrative style3. Lead students to understand the value of protecting cultural heritage by teamwork and global community;
新人教版高中英語(yǔ)必修2Unit 2 Wildlife Protection-Reading and Thinking教案二
The theme of this unit is human and nature, focusing on the theme of wildlife protection. Nature is a complex ecosystem, in which there are delicate balance between animals and plants. Because of the role of the food chain, the extinction of one species will produce influence, causing a series of chain reaction. Large scale extinction of species will have a serious and even irreversible impact on the ecosystem, resulting in immeasurable losses. Therefore, it is of great significance to protect wild species. To protect wild species is to protect human beings themselves. The motto of this unit is "when the buying stops, the killing can too,” which is a public service advertising slogan to protect wildlife. It tells people that every rhinoceros horn, every fur, every bowl of shark fin soup, every Ivory product, and every tiger bone product, etc. consumed by human beings, are innocent wild animals slaughtered behind them. The mission of wild aid is to ban illegal trade in endangered wildlife and mitigate climate change. It aims to educate the public to reduce the consumption demand for endangered wildlife products through public publicity and improve the awareness of environmental protection.1. Improve the awareness of wildlife protection by acquiring the knowledge of wildlife protection.2. Focus on environmental protection and protection of all lives.3. Analysis of the living environment of wild animals with appropriate thinking mode.4. Skillfully use the vocabulary and grammar knowledge of this unit to cultivate self-study ability according to the unit content5. Develop cooperative learning ability through discussion and other ways1. Enable the Ss to talk about the current situation of wild animals.2. Guide the Ss to summarize the main idea of each paragraph as well as the main idea of the text.
新人教版高中英語(yǔ)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(yǔ)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(yǔ)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(yǔ)必修2Unit 4 History and Traditions-Discovering Useful Structure教案二
This teaching period mainly deals with grammar: The past participle is used as attributive and objective complement.1. Guide students to review the basic usages of the past participle used as attributive and objective complement.2. Lead students to learn to use some special cases concerning the past participle used as attributive and objective complement flexibly.3. Strengthen students’ great interest in grammar learning.1. Help students to appreciate the function of the past participle used as attributive and objective complement.2. Instruct students to write essays using the past participle used as attributive and objective complement.Step1:溫故而知新。Analyze the underlined phrases and then sum up the common usages of the past participles.1．(教材P41)They had castles built(build) all around England, and made changes to the legal system．2．(教材P42)They use the same flag, known(know) as the Union Jack，．．．3．(教材P42)Judy and I had our car parked(park) in an underground car park near Trafalgar Square, where we could get our car battery charged(charge)．Common points: f the past participle used as attributive and objective complement.Step 2:過(guò)去分詞作定語(yǔ)時(shí)的意義1．及物動(dòng)詞的過(guò)去分詞作定語(yǔ)，在語(yǔ)態(tài)上表示被動(dòng)；在時(shí)間上，常表示動(dòng)作已經(jīng)發(fā)生或完成，有時(shí)也不表示時(shí)間性。Our teacher watched us doing the experiment and gave us a satisfied smile at last．我們的老師看著我們做實(shí)驗(yàn)，最后給了我們一個(gè)滿意的微笑。The plan put forward at the meeting will be carried out soon．會(huì)上提出的計(jì)劃將很快被執(zhí)行。2．不及物動(dòng)詞的過(guò)去分詞作定語(yǔ)，它不表示被動(dòng)意義，只強(qiáng)調(diào)動(dòng)作完成。Many little kids like gathering fallen leaves in the yard．
新人教版高中英語(yǔ)必修2Unit 4 History and Traditions-Reading and Thinking教案二
Step 5 While reading---Task 3Read the text again and answer the following questions.Q1: How many countries does the UK consist of ?4 Q2: What are the four countries of the United Kingdom?England, Wales, Scotland and Northern Ireland Q3: Which two were the first to be joined together ?England and WalesQ4: What are the two chief advantages of studying the history of a country ?The first one is to help you understand more about the country and its traditions.The second one is to make visiting it more enjoyable.Q5: What’s the author’s attitude towards studying the history ?Supportive/positiveStep 6 Post reading---Retell the textThe United Kingdom, Great Britain, Britain, England—many people are confused by (1)_____ these different names mean. In the 16th century, the nearby country of Wales (2) __________(join) to the Kingdom of England. In the 19 th century, the Kingdom of Ireland was added to create the United Kingdom of Great Britain and Ireland. Finally, the southern part of Ireland (3) ______ (break) away from the UK, which resulted in the full name we have today. However, most people just use the (4)_________(shorten) name: the UK. The four countries (5)__________ belong to the United Kingdom work together in some areas. There were four sets of invaders and the last group were the Normans. They had castles (6)_________(build) all around England and made changes (7)__________ the legal system. Studying the history of the country will make your visit much more (8)_________(enjoy). The capital city London is (9)___ ancient port city that has a history (10)______(date) back to Roman times. 1. what 2.was joined 3.broke 4.shortened 5.that 6. built 7.to 8.enjoyable 9.an 10.dating Step 6 Homework
新人教版高中英語(yǔ)必修2Unit 4 History and Traditions-Listening＆Speaking＆Talking教案二
Listening and Speaking introduces the topic of “Take part in a youth project”. The listening text is an interview about "sharing views on historical sites". Through listening to a dialogue between Chinese and foreign students on the way to the Confucius Temple, students can understand their views on the Confucius Temple, Confucius, Confucius' descendants and Confucius' educational thoughts, so as to realize and think about the profound influence of Confucius and his thoughts on Chinese historical tradition. At the same time, the dialogue naturally integrates English idioms and mentions Shakespeare, the British playwright, so as to provide language materials and context for students to understand English idioms and related cultural allusions, as well as to compare Chinese and foreign cultures, which is helpful for students to understand and express the language such as history, tradition, culture and custom significant impact.Text analysis: listening text is a dialogue between a British student and a Chinese student when he goes to the Confucius Temple. When William, a British student, visited the Confucius Temple, he asked Xiao Kong, a Chinese student, for directions. Xiao Kong was just going to the Confucius Temple to meet with the members of the research group, so they went together and exchanged their views on the Confucius Temple, Confucius, Confucius' descendants and Confucius' educational thoughts. From the perspective of foreign tourists, this paper describes their thoughts on Confucius, the great son of Confucius, who had a profound impact on Chinese history and cultural tradition, and his education.Listening and Talking introduces a visit to a historic tourist destination. Tourism is a common way to understand a country's history, culture, and customs and so on. Students listen to the dialogue between Xiao Yan, a youth hostel Usher, and Paul, a backpacker, to learn about Pingyao's famous historical and cultural attractions and Paul's travel experience and experience as a foreign tourist.
新人教版高中英語(yǔ)必修2Unit 5 Music-Discovering Useful Structures教案二
4. When he got absorbed in his world of music, he felt as if he could “see” the beauty of the world around him, like he had in his previous life.P·P as adverbial: _________________________________________________________________.Function: _______________________________________________________________________.Step 5 Solid Complete the passage with the words in brackets in their correct forms.Well known as a successful band, the Impact members show quite a few striking qualities. They never ever give up. When _____________(question) by the media, they are not _____________(discourage) and practise even harder. They are improving themselves by attending several master training class. They are united. _____________(fill with) team spirit, they act as a whole, always aiming for glory. Step 6 Difference and similarity from -ingObserve the following examples.1. He went out, shutting the door behind him.=He went out, ________________________________________________________.2. Not knowing what to do, he went to his parents for help.=__________________________________________, he went to his parents for help.Similarity: _______________________________________________________________________________________________________________________________________________________.Difference : _______________________________________________________________________________________________________________________________________________________.Step Practice1. ________ in a hurry, this article was not so good. 因?yàn)閷?xiě)得匆忙, 這篇文章不是很好。2. ________ carefully, he found something he hadn’t known before. 他仔細(xì)讀書(shū)時(shí), 發(fā)現(xiàn)了一些從前不知道的東西。3. ________ why he did it, the monitor said it was his duty. 當(dāng)被問(wèn)及他為什么要這么做時(shí), 班長(zhǎng)說(shuō)這是他的職責(zé)
新人教版高中英語(yǔ)必修2Unit 5 Music-Reading and Thinking教案二
1. Get basic information about Eric; read deeply to understand the history and development of the virtual choir.2. Understand what the function of the virtual choir is and how to make a virtual choir.3. Understand the meaning of some languages in the context of the text through question guidance, such as “Many people do not have close friends or contacts who have the same interest in music.” and so on.Step 1 Leading-in1. Answer the following questions.Q1：Do you know the Apps like Tik Tok and Quick Hand?Q2: Do you want to make a Tik Tok video or a Quick Hand video?2. Play a Tik Tok video Step 2: Understanding the title Q1：What does the title mean ?Q2: Is the article a narration or exposition? Why? Q3: Can you change the title ? If you can, what is the title?Step 3: Scanning the whole text and getting the basic information1. Answer the following questions.Q1：Who came up with the idea for a virtual choir?Q2: Where did Eric studied the musical composition?Q3: What is his song?2. Find the main idea of each paragraph3. Deal with some new words.Step 4: Reading carefully to get detailed informationPara 1 How to make a virtual choir1. PreparationA. tools: a virtual camera; an Internet connectionB. hero/heroin: friends or some individuals who have the same interests2. Process
新人教版高中英語(yǔ)必修2Unit 5 Music-Reading for Writing教案二
The Internet celebrity Gao Yifeng. Years ago, he owned 5 companies and the staffs over 1,000, but during the economy crisis, he became nothing but debt. He was so worried that his hair became white overnight. There was a time when he wanted to killed himself. But after listening to the song Start Over by Liu Huan, he decided to cheer himself up. He started a steamed bun shop and gradually became a national chain shops. Now he became successful again.Walter Haddon said, “Music is the medicine of a troubled mind.” Music contains such a pleasant and inspiring force. Music gave him courage and bravery. When he listened to the song, it made his spirit fly like a kite in the wind. Music gave him strength and brought him relief. It was the rock I leant on to become strong and to get through those hard times. I hope none of us have to go through the same kind of suffering that he did. At the same time, we all go through various periods when we feel sad or alone. During those times, music can help us in the same way that it helped him. I hope we all will somehow begin to treasure music and make it a part of our life. Thank you for your listening !5.Revise your writing each other.Does he/she explain how music has changed his/her/someone else’s life?Are some of the rhetorical devices included and used properly ?Does he/she talk about how music makes him/her/someone feel?Is the first word in each sentences capitalised?Does he/she use correct punctuation ?
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)第二章復(fù)習(xí)教案
． 一個(gè)數(shù)的倒數(shù)等于它本身的數(shù)是（）A．1 B． C．±1 D．04． 下列判斷錯(cuò)誤的是（）A．任何數(shù)的絕對(duì)值一定是非負(fù)數(shù)； B．一個(gè)負(fù)數(shù)的絕對(duì)值一定是正數(shù)；C．一個(gè)正數(shù)的絕對(duì)值一定是正數(shù)； D．一個(gè)數(shù)不是正數(shù)就是負(fù)數(shù)；5． 有理數(shù)a、b、c在數(shù)軸上的位置如圖所示則下列結(jié)論正確的是（）A．a(chǎn)＞b＞0＞c B．b＞0＞a＞cC．b＜a＜0＜ D．a(chǎn)＜b＜c＜06．兩個(gè)有理數(shù)的和是正數(shù)，積是負(fù)數(shù)，則這兩個(gè)有理數(shù)（ ）A．都是正數(shù)； B．都是負(fù)數(shù)； C．一正一負(fù)，且正數(shù)的絕對(duì)值較大； D．一正一負(fù)，且負(fù)數(shù)的絕對(duì)值較大。7．若│a│=8，│b│=5，且a + b＞0，那么a－b的值是（ ）A．3或13 B．13或－13 C．3或－3 D．－3或－138. 大于－1999而小于2000的所有整數(shù)的和是（）A．－1999 B．－1998 C．1999 D．20009． 當(dāng)n為正整數(shù)時(shí)， 的值是（）
北師大初中八年級(jí)數(shù)學(xué)下冊(cè)第二章復(fù)習(xí)教案
例1 解不等式x＞ x－2，并將其解集表示在數(shù)軸上.例2 解不等式組 .例3 小明放學(xué)回家后，問(wèn)爸爸媽媽小牛隊(duì)與太陽(yáng)隊(duì)籃球比賽的結(jié)果．爸爸說(shuō)：“本場(chǎng)比賽太陽(yáng)隊(duì)的納什比小牛隊(duì)的特里多得了12分．”媽媽說(shuō)：“特里得分的兩倍與納什得分的差大于10；納什得分的兩倍比特里得分的三倍還多．”爸爸又說(shuō)：“如果特里得分超過(guò)20分，則小牛隊(duì)贏；否則太陽(yáng)隊(duì)贏．”請(qǐng)你幫小明分析一下．究竟是哪個(gè)隊(duì)贏了，本場(chǎng)比賽特里、納什各得了多少分?例4 暑假期間，兩名家長(zhǎng)計(jì)劃帶領(lǐng)若干名學(xué)生去旅游，他們聯(lián)系了報(bào)價(jià)均為每人500元的兩家旅行社，經(jīng)協(xié)商，甲旅行社的優(yōu)惠條件是：兩名家長(zhǎng)全額收費(fèi)，學(xué)生都按七折收費(fèi)；乙旅行社的優(yōu)惠條件是家長(zhǎng)、學(xué)生都按八折收費(fèi).假設(shè)這兩位家長(zhǎng)帶領(lǐng)x名學(xué)生去旅游，他們應(yīng)該選擇哪家旅行社？
北師大初中九年級(jí)數(shù)學(xué)下冊(cè)二次函數(shù)1教案
(2)由題意可得－10x2＋180x＋400＝1120，整理得x2－18x＋72＝0，解得x1＝6，x2＝12(舍去)．所以，該產(chǎn)品的質(zhì)量檔次為第6檔．方法總結(jié)：解決此類(lèi)問(wèn)題的關(guān)鍵是要吃透題意，確定變量，建立函數(shù)模型．變式訓(xùn)練：見(jiàn)《學(xué)練優(yōu)》本課時(shí)練習(xí)“課后鞏固提升”第8題三、板書(shū)設(shè)計(jì)二次函數(shù)1．二次函數(shù)的概念2．從實(shí)際問(wèn)題中抽象出二次函數(shù)解析式二次函數(shù)是一種常見(jiàn)的函數(shù)，應(yīng)用非常廣泛，它是客觀地反映現(xiàn)實(shí)世界中變量之間的數(shù)量關(guān)系和變化規(guī)律的一種非常重要的數(shù)學(xué)模型．許多實(shí)際問(wèn)題往往可以歸結(jié)為二次函數(shù)加以研究．本節(jié)課是學(xué)習(xí)二次函數(shù)的第一節(jié)課，通過(guò)實(shí)例引入二次函數(shù)的概念，并學(xué)習(xí)求一些簡(jiǎn)單的實(shí)際問(wèn)題中二次函數(shù)的解析式．在教學(xué)中要重視二次函數(shù)概念的形成和建構(gòu)，在概念的學(xué)習(xí)過(guò)程中，讓學(xué)生體驗(yàn)從問(wèn)題出發(fā)到列二次函數(shù)解析式的過(guò)程，體驗(yàn)用函數(shù)思想去描述、研究變量之間變化規(guī)律的意義.
北師大初中九年級(jí)數(shù)學(xué)下冊(cè)二次函數(shù)2教案
4．x的值是否可以任意取?如果不能任意取，請(qǐng)求出它的范圍，[x的值不能任意取，其范圍是0≤x≤2]5．若設(shè)該商品每天的利潤(rùn)為y元，求y與x的函數(shù)關(guān)系式。[y=(10－8－x) (100＋100x)(0≤x≤2)]將函數(shù)關(guān)系式y(tǒng)=x(20－2x)(0 ＜x ＜10＝化為：y=－2x2＋20x (0＜x＜10)…(1)將函數(shù)關(guān)系式y(tǒng)=(10－8－x)(100＋100x)(0≤x≤2)化為：y=－100x2＋100x＋20D (0≤x≤2)…(2)三、觀察；概括1.教師引導(dǎo)學(xué)生觀察函數(shù)關(guān)系式(1)和(2)，提出問(wèn)題讓學(xué)生思考回答；(1)函數(shù)關(guān)系式(1)和(2)的自變量各有幾個(gè)? (各有1個(gè))(2)多項(xiàng)式－2x2＋20和－100x2＋100x＋200分別是幾次多項(xiàng)式?(分別是二次多項(xiàng)式)(3)函數(shù)關(guān)系式(1)和(2)有什么共同特點(diǎn)? (都是用自變量的二次多項(xiàng)式來(lái)表示的)(4)本章導(dǎo)圖中的問(wèn)題以及P1頁(yè)的問(wèn)題2有什么共同特點(diǎn)？讓學(xué)生討論、歸結(jié)為：自變量x為何值時(shí)，函數(shù)y取得最大值。2．二次函數(shù)定義：形如y=ax2＋bx＋c (a、b、、c是常數(shù)，a≠0)的函數(shù)叫做x的二次函數(shù)， a叫做二次函數(shù)的系數(shù)，b叫做一次項(xiàng)的系數(shù)，c叫作常數(shù)項(xiàng)．
大班健康：眼保健操教案
一、談話導(dǎo)入1、用一則生動(dòng)的謎語(yǔ)引入活動(dòng)主題:有趣有趣真有趣,小小兩顆黑葡萄。白天躲在草叢里,晚上急忙蓋被子。是什么?（課件：眼睛）2、說(shuō)說(shuō)是怎么猜出來(lái)的：你怎么知道的?3、引導(dǎo)認(rèn)識(shí)眼睛的重要性：我們的眼睛重要嗎？為什么重要？（講到寫(xiě)字時(shí)）是呀，他能幫助我們寫(xiě)字?，F(xiàn)在我們就來(lái)寫(xiě)一寫(xiě)：“黑眼睛，亮晶晶”4、體驗(yàn)失去眼睛后的不便：這么重要的東西如果沒(méi)有了會(huì)怎么樣呢？（閉上眼睛再寫(xiě)一遍，一起睜開(kāi)眼睛，先自己欣賞再前后桌交流欣賞。）5、挑選幾份進(jìn)行展示、交流：看到小朋友寫(xiě)的兩次完全不同的字,你有什么想說(shuō)的嗎？二、引導(dǎo)幼兒初步認(rèn)識(shí)眼睛的作用眼睛可真了不起，但他也是非常脆弱的，很容易受到傷害。聽(tīng)，是誰(shuí)在哭……1、以眼睛自述的形式引導(dǎo)幼兒了解不良的用眼習(xí)慣帶來(lái)的嚴(yán)重危害。2、通過(guò)交流感受帶眼鏡的麻煩
大班社會(huì)教案：遵守規(guī)則
規(guī)則意識(shí)及執(zhí)行規(guī)則意識(shí)能力不僅影響幼小銜接的社會(huì)性，也將影響一個(gè)人終身適應(yīng)社會(huì)的程度。所以規(guī)則意識(shí)及規(guī)則執(zhí)行能力的培養(yǎng)是社會(huì)性的重要組成部分，不僅可以緩解幼小銜接的坡度，還將使孩子終身受益。 新綱要中提出，理解并遵守日常生活中的基本的社會(huì)行為規(guī)則，并要求教師在共同的生活中以多種方式引導(dǎo)幼兒認(rèn)識(shí)、體驗(yàn)并理解基本的社會(huì)行為規(guī)則，學(xué)習(xí)自律和尊重他人?？梢?jiàn)，規(guī)則是保證幼兒愉快生活、交往、學(xué)習(xí)的前提，對(duì)大班幼兒進(jìn)行執(zhí)行規(guī)則能力的培養(yǎng)，具有非常重要的意義。