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新人教版高中英語必修2Unit 5 Music-Discovering Useful Structures教案一
Step1:自主探究。1．(教材P52)Born(bear) in the USA on 2 January 1970, Whitacre began studying music at the University of Nevada in 1988．2．(教材P52) Moved(move) by this music, he said, “It was like seeing color for the first time．”3．(教材P56)I was very afraid and I felt so alone and discouraged(discourage)．4．(教材P58)Encouraged(encourage) by this first performance and the positive reaction of the audience, I have continued to play the piano and enjoy it more every day．Step2:語法要點精析。用法1：過去分詞作表語1）．過去分詞可放在連系動詞be, get, feel, remain, seem, look, become等之后作表語，表示主語所處的狀態(tài)Tom was astonished to see a snake moving across the floor．湯姆很驚訝地看到一條蛇正爬過地板。Finally the baby felt tired of playing with those toys．終于嬰兒厭倦了玩那些玩具。注意：1）.過去分詞作表語時與被動語態(tài)的區(qū)別過去分詞作表語時，強(qiáng)調(diào)主語所處的狀態(tài)；而動詞的被動語態(tài)表示主語是動作的承受者，強(qiáng)調(diào)動作。The library is now closed．(狀態(tài))圖書館現(xiàn)在關(guān)閉了。The cup was broken by my little sister yesterday．(動作)昨天我妹妹把杯子打碎了。2）感覺類及物動詞的現(xiàn)在分詞與過去分詞作表語的區(qū)別過去分詞作表語多表示人自身的感受或事物自身的狀態(tài)，常譯作“感到……的”；現(xiàn)在分詞多表示事物具有的特性，常譯作“令人……的”。
新人教版高中英語必修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
新人教版高中英語必修2Unit 5 Music-Reading and Thinking教案一
This section focuses on "learning about experiencing music Online". This virtual choir is a new form of music performance. Members from all over the world don't need to love to come to a place. Instead, they use the new technology to model the various parts and wonderful virtual harmony group of music in the family. Students need to understand the main meaning of each paragraph. Finding topic sentences is an important way to understand the general idea of a paragraph. After the topic sentence, it is usually the detail sentence that supports and explains the topic sentence. Some paragraphs have obvious subject sentences, for example, the first sentence of the second paragraph is the subject sentence of the paragraph, and the following sentenceStudents need to pay attention to the topic sentences and key sentences, and then pay attention to how the sentences after the meaning explain, explain and support the topic sentences or key sentences before.1.Guide students to learn about experiencing music online2.Guide students to scan and circle the information in the text.3.Guide students to find the numbers and dates to fill in the timeline.4.Guide students to learn more about music by completing the sentences with the correct forms of the words and phrases. And then make a mind map about the outline of the passage.1. Guide students to pay attention to reading strategies, such as prediction, self-questioning and scanning.2. Help students sort out the main meaning of each paragraph and understand the narrative characteristics of "timeline” in illustrative style.3. Lead students to understand the changes that have been caused by the Internet.
新人教版高中英語必修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 ?
新人教版高中英語必修2Unit 5 Music-Reading For Writing教案一
(4)Now we have heard a number of outstanding speeches ... 我們已經(jīng)聆聽了許多精彩的發(fā)言……(5)Because we wanted the nations of the world, working together, to deal with ... 因為我們希望全世界各國團(tuán)結(jié)起來去應(yīng)對……(6)And if we do not act ... 如果我們不采取行動……(7)Now, I share the concerns that have been expressed ... 我也同意對于……表達(dá)的擔(dān)心(8)Let us show the world that by working together we can ... 讓我們告訴全世界，通過一起努力我們可以……(9)It is now time for us to ... 是時候我們……(10)And I have always wished that ... 我一直希望……(11)Thank you for letting me share this day with me.感謝你們和我共度這一天。實踐演練：假如你是高中生李華，你校將舉辦一次以“音樂”為主題的演講比賽，請你按照主題，寫下你的演講稿。注意：詞數(shù)100左右。First of all, thank you for listening to my speech. My topic is: love music like love yourself.Music is like the air we need to maintain our normal lives around us. You can't imagine how terrible a world without music would be. Movies and TV shows have no music, only dry conversations and scenes; mobile phones only vibrations; streets only noisy crowds; cafes, western restaurants only depressed meals. What a terrible world it is!As a student, I hope we all can enjoy the fun brought by music in our spare time. Instead of just listening to music, we can even make our own music. Let's enjoy the fun of music!Thanks again for your attention!
人教版高中數(shù)學(xué)選修3分類加法計數(shù)原理與分步乘法計數(shù)原理(2)教學(xué)設(shè)計
當(dāng)A,C顏色相同時,先染P有4種方法,再染A,C有3種方法,然后染B有2種方法,最后染D也有2種方法.根據(jù)分步乘法計數(shù)原理知,共有4×3×2×2=48(種)方法;當(dāng)A,C顏色不相同時,先染P有4種方法,再染A有3種方法,然后染C有2種方法,最后染B,D都有1種方法.根據(jù)分步乘法計數(shù)原理知,共有4×3×2×1×1=24(種)方法.綜上,共有48+24=72(種)方法.故選B.答案:B5.某藝術(shù)小組有9人,每人至少會鋼琴和小號中的一種樂器,其中7人會鋼琴,3人會小號,從中選出會鋼琴與會小號的各1人,有多少種不同的選法?解:由題意可知,在藝術(shù)小組9人中,有且僅有1人既會鋼琴又會小號(把該人記為甲),只會鋼琴的有6人,只會小號的有2人.把從中選出會鋼琴與會小號各1人的方法分為兩類.第1類,甲入選,另1人只需從其他8人中任選1人,故這類選法共8種;第2類,甲不入選,則會鋼琴的只能從6個只會鋼琴的人中選出,有6種不同的選法,會小號的也只能從只會小號的2人中選出,有2種不同的選法,所以這類選法共有6×2=12(種).因此共有8+12=20(種)不同的選法.
新人教版高中英語必修1Unit 3 Sports and Fitness-Reading and Thinking教案
2. Sort out detailed information about Michael Jordan.（1） Understand the transitional sentence.Q: Which part is about Michael Jordan as a master? Which part is about the example he set?（2） Have the Ss Focus on why Michael Jordan is a master and what good examples Michael Jordan set when they’re reading. And think about these questions as below:Q1: How does the author describe his impressive skills?Q2: How do you understand “time seemed to stand still”?Q3: What does “graceful” mean?Q4. Which sentence do you think best describes his mental strength?Q5. Which words is important in the sentence in describing his mental strength? Why?Q6: How do you understand “unique”?Q7: What can we learn from Michael Jordan?Step 5 Discussing and recommendingRecommend their own living legends of sports.Work in groups to choose your own living legend of sports and give the reasons of your choice. Step 6 HomeworkReview the stories of Lang Ping and Michael Jordan, and try to retell them.
新人教版高中英語必修1Unit 3 Sports and Fitness-Reading for Writing教案
Then have them write a short paragraph to describe and explain their changes. After that, get the Ss to exchange their drafts with their partners and use the checklist to give feedback on their drafts, and finally revise it.Step 5 Summary of how to write a wellness book1.健康書的審題步驟：第一步：明確要求該寫作屬于經(jīng)驗分享，故要用第一人稱來寫;時態(tài)以一股現(xiàn)在時為主。第二步：確定段落該類文章可以從以下三個方面人手:Para.1首先表明寫作的目的Para.2自己的做法及心得體會Para.3表示期望及感謝第三步：提煉要點2.健康書常見句式：1) It is an honor for me to share my favorite sport with you,2) It makes me feel relaxed playing with my friends.3) It makes me rid myself of stress while playing with my friends.4) Moreover, it provides me a valuable chance to communicate with others.5) I we eat too little or too much, or if we choose the wrong food, we may become sick.6) We can do something to change the poor situation.Step 6Homework假如你的老師讓你在班級Wellness Bok上分享自己的親身經(jīng)歷及心得，請根據(jù)以下要點寫一篇80字左右的文章1. 你喜歡的運(yùn)動是什么？2. 你最喜歡的原因是什么？3. 你參加鍛煉的體會。
人教版新課標(biāo)PEP小學(xué)英語三年級上冊Look at me教案（全英文版）
３、Practicea. Nice to meet you. Nice to meet you,too.b. Perform the dialogue.c. Arrange the dialogue according to the pictures or sentence cards.d. Let’s play.A: Good afternoon,B. This is C. Hello, C! Nice to meet you.C: Nice to meet you, too.A,B: Goodbye!C: Bye!４、Assessment Workbook page 10Add-activitiesa. Listen to the recording and repeat.b. Make a dialogue according to "Let’s talk".Second Period一、Teaching contents1. Let’s learn Words：body, leg, arm, hand, finger, foot.1. Let’s do二、Preparation１、a puppet２、Cards of body, leg, arm, hand, finger and foot.３、headgear of a captain三、Teaching steps１、Warm-up/ Revisiona. Captain says to review "let’s do" of Part A.b. Perform the students their own dialogues.２、Presentationa. Learn to say "body, leg, arm, hand, finger and foot."b. Listen to the recording and repeat.c. Let’s do. Clap your hands. Snap your fingers. Wave your arms. Cross your legs. Shake your body. Stamp your foot.３、Practicea. Let’s draw a person.b. Let’s do. Point out which picture.c. Let’s do. Who responses faster.４、Assessment Workbook page 11５、Add-activitiesa. Listen to the recording, repeat and act out.b. Say all the names of the body to your parents.Third Period一、Teaching contents1. Let’s check2. Let’s chant二、Preparation１、stationeries１、pictures of parts of Zoom
人教版新課標(biāo)PEP小學(xué)英語三年級上冊Happy Birthday（全英文版）說課稿
1. Do some exercise on the paper. There are four kinds of exercise here. The exercise 1 is to develop Ss’ ability of listening. Exercise 2 is to practice Ss’ ability of knowing the words. Exercise 3 is to develop Ss’ ability of speaking numbers and letters. Exercise 4 is to make Ss know the words and letters well. These exercises can consolidate the new knowledge from different styles of problems.2. Then tell Ss that we can sing the numbers like “ Do, re, mi, fa, so, la, ti, do” and let them listen to a song named “Do, Re, Mi”. Add some extra knowledge so that Ss will be glad to see that the numbers can be used in another way.Step 4 Homework1.Read the numbers from 1 to 7 and 7 to 1 five times.2.Read the letters “u, v, w” five times follow the tape.Reading is a useful way for the Ss of Grade One to practice the knowledge. Ask Ss to imitate reading from the tape in order to make Ss have a good habit of listening and let them have a better pronunciation.Step 5 Board writingI ‘ll put the seven numbers like a scale(音階)as I’ll let Ss know that we can sing out the numbers. When it comes to listen to the song, I ‘ll draw a musical note on Bb. Unit 9 Happy birthday!sevensixfivefourthree U u V v W wtwo pupil five windowoneThat’s all for my class designing. Thank you for listening!
人教A版高中數(shù)學(xué)必修一單調(diào)性與最大（小）值教學(xué)設(shè)計（1）
《函數(shù)的單調(diào)性與最大（?。┲祡》系人教A版高中數(shù)學(xué)必修第一冊第三章第二節(jié)的內(nèi)容,本節(jié)包括函數(shù)的單調(diào)性的定義與判斷及其證明、函數(shù)最大（?。┲档那蠓āＴ诔踔袑W(xué)習(xí)函數(shù)時,借助圖像的直觀性研究了一些函數(shù)的增減性,這節(jié)內(nèi)容是初中有關(guān)內(nèi)容的深化、延伸和提高函數(shù)的單調(diào)性是函數(shù)眾多性質(zhì)中的重要性質(zhì)之一,函數(shù)的單調(diào)性一節(jié)中的知識是前一節(jié)內(nèi)容函數(shù)的概念和圖像知識的延續(xù),它和后面的函數(shù)奇偶性,合稱為函數(shù)的簡單性質(zhì),是今后研究指數(shù)函數(shù)、對數(shù)函數(shù)、冪函數(shù)及其他函數(shù)單調(diào)性的理論基礎(chǔ);在解決函數(shù)值域、定義域、不等式、比較兩數(shù)大小等具體問需用到函數(shù)的單調(diào)性;同時在這一節(jié)中利用函數(shù)圖象來研究函數(shù)性質(zhì)的救開結(jié)合思想將貫穿于我們整個高中數(shù)學(xué)教學(xué)。
人教A版高中數(shù)學(xué)必修一用二分法求方程的近似解教學(xué)設(shè)計（1）
《數(shù)學(xué)1必修本（A版）》的第五章4.5.2用二分法求方程的近似解．本節(jié)課要求學(xué)生根據(jù)具體的函數(shù)圖象能夠借助計算機(jī)或信息技術(shù)工具計算器用二分法求相應(yīng)方程的近似解，了解這種方法是求方程近似解的常用方法，從中體會函數(shù)與方程之間的聯(lián)系；它既是本冊書中的重點內(nèi)容，又是對函數(shù)知識的拓展，既體現(xiàn)了函數(shù)在解方程中的重要應(yīng)用，同時又為高中數(shù)學(xué)中函數(shù)與方程思想、數(shù)形結(jié)合思想、二分法的算法思想打下了基礎(chǔ)，因此決定了它的重要地位．發(fā)展學(xué)生數(shù)學(xué)直觀、數(shù)學(xué)抽象、邏輯推理和數(shù)學(xué)建模的核心素養(yǎng)。課程目標(biāo) 學(xué)科素養(yǎng)1.通過具體實例理解二分法的概念及其使用條件．2.了解二分法是求方程近似解的常用方法，能借助計算器用二分法求方程的近似解．3.會用二分法求一個函數(shù)在給定區(qū)間內(nèi)的零點，從而求得方程的近似解． a.數(shù)學(xué)抽象：二分法的概念；b.邏輯推理：運(yùn)用二分法求近似解的原理；
統(tǒng)編版二年級語文上第2課我是什么教學(xué)設(shè)計教案
《小蝌蚪找媽媽》是統(tǒng)編版二年級上冊第一單元的一篇寓水的知識于趣味故事中的科學(xué)童話。課文采用擬人手法，以第一人稱“我”的敘述方式，生動形象地介紹了自然界中水的變化及其利與害。課文用詞準(zhǔn)確、語言優(yōu)美、想象豐富，把知識性、科學(xué)性融于趣味性之中，文中多處運(yùn)用短長句的方式寫出了語言的節(jié)奏感，擬人化的詞句增強(qiáng)了畫面感，充滿情趣。比如“有時候……有時候……”“落”“打”“飄”體現(xiàn)了用詞準(zhǔn)確、嚴(yán)謹(jǐn)?shù)奶攸c。教學(xué)時以學(xué)生為主體，讓每個人有嘗試的機(jī)會和自主選擇的權(quán)利。力求采用自主、合作的學(xué)習(xí)方式探究問題，解決問題，使學(xué)生在生生互動、師生互動中，相互啟發(fā)，拓展思路，分享學(xué)習(xí)之樂。讓學(xué)生在開放而有活力的課堂氛圍中始終處于積極主動的學(xué)習(xí)狀態(tài)，變“被動地學(xué)”為“主動地學(xué)”。 ·教學(xué)目標(biāo)· 1.認(rèn)識“曬、極”等15個生字，會寫“變、極”等10個生字，讀準(zhǔn)多音字“沒”。掌握“天空、傍晚”等詞語。2.能正確、流利、有感情地朗讀課文，簡單說說水的變化過程。3.了解氣候常識，知道汽、云、雨、冰雹和雪都是水的不同形態(tài)。知道水的利與害。4.通過學(xué)習(xí)，讓學(xué)生知道只有合理地利用水資源才能造福人類的道理，樹立環(huán)保意識，激發(fā)學(xué)生探究科學(xué)的興趣。 ·教學(xué)重難點· 1.教學(xué)重點：能正確、流利地朗讀課文。簡單說出水的變化過程，體會“落、打、飄”用詞的準(zhǔn)確，并能仿照說句子。2.教學(xué)難點：了解氣候常識，知道汽、云、雨、冰雹和雪都是水的不同形態(tài)。知道水的利與害。
統(tǒng)編版二年級語文上識字2樹之歌教學(xué)設(shè)計教案
《樹之歌》是統(tǒng)編版二年級上冊第二單元的一篇識字課文。介紹樹木特征的歸類識字歌，描寫了楊樹、榕樹、梧桐樹……等11種樹木，表現(xiàn)了大自然樹木種類的豐富。課文安排了一組“木”字旁歸類識字。把樹木的名稱集中在一首詩歌中，讓學(xué)生在感受美麗景色、感受美好生活的同時，認(rèn)識事物，認(rèn)識表示樹木的漢字，感知不同樹木的名稱。教學(xué)的過程中可引導(dǎo)學(xué)生在誦讀文本的同時，體現(xiàn)多樣的識字形式，要將識字教學(xué)與閱讀文本有機(jī)融合, 在反復(fù)的讀書體會中，引導(dǎo)學(xué)生發(fā)現(xiàn)漢字規(guī)律，運(yùn)用形聲字形旁表義、聲旁表音的特點歸類識字，并鼓勵學(xué)生運(yùn)用已經(jīng)掌握的方法自主識字。 1.認(rèn)識“梧、桐”等15個生字，會寫“楊、壯”等10個生字。學(xué)會運(yùn)用形聲字的特點自主識字。2.正確、流利地朗讀兒歌，并背誦全文。3.通過看圖和讀兒歌，初步了解11種樹木的基本特點。積累與樹木有關(guān)的語句。4.引導(dǎo)學(xué)生學(xué)會觀察身邊的事物，樹立愛護(hù)花草樹木的意識。 1.教學(xué)重點：學(xué)會本課生字，利用形聲字特點掌握木字旁的8個生字。朗讀課文，背誦課文。了解不同樹木的特點。2.教學(xué)難點：能按掌握形聲字的構(gòu)字特點，了解11種樹木的基本特點。積累與樹木有關(guān)的語句。能背誦課文。 2課時
【高教版】中職數(shù)學(xué)拓展模塊：2.3《拋物線》教學(xué)設(shè)計
一、教學(xué)目標(biāo)(一)知識教育點使學(xué)生掌握拋物線的定義、拋物線的標(biāo)準(zhǔn)方程及其推導(dǎo)過程．(二)能力訓(xùn)練點要求學(xué)生進(jìn)一步熟練掌握解析幾何的基本思想方法，提高分析、對比、概括、轉(zhuǎn)化等方面的能力．(三)學(xué)科滲透點通過一個簡單實驗引入拋物線的定義，可以對學(xué)生進(jìn)行理論來源于實踐的辯證唯物主義思想教育．二、教材分析1．重點：拋物線的定義和標(biāo)準(zhǔn)方程．2．難點：拋物線的標(biāo)準(zhǔn)方程的推導(dǎo)．三、活動設(shè)計提問、回顧、實驗、講解、板演、歸納表格．四、教學(xué)過程(一)導(dǎo)出課題我們已學(xué)習(xí)了圓、橢圓、雙曲線三種圓錐曲線．今天我們將學(xué)習(xí)第四種圓錐曲線——拋物線，以及它的定義和標(biāo)準(zhǔn)方程．課題是“拋物線及其標(biāo)準(zhǔn)方程”．首先，利用籃球和排球的運(yùn)動軌跡給出拋物線的實際意義，再利用太陽灶和拋物線型的橋說明拋物線的實際用途。
【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
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：正態(tài)分布的密度函數(shù)和分布函數(shù)。教學(xué)難點：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：2學(xué)時教學(xué)過程: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，我們先計算積分。首先計算。因為(利用極坐標(biāo)計算)所以。記，則利用定積分的換元法有因為，所以它可以作為某個連續(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。
【高教版】中職數(shù)學(xué)拓展模塊：2.2《雙曲線》教學(xué)設(shè)計
教學(xué)準(zhǔn)備 1. 教學(xué)目標(biāo) 知識與技能掌握雙曲線的定義，掌握雙曲線的四種標(biāo)準(zhǔn)方程形式及其對應(yīng)的焦點、準(zhǔn)線．過程與方法掌握對雙曲線標(biāo)準(zhǔn)方程的推導(dǎo)，進(jìn)一步理解求曲線方程的方法——坐標(biāo)法．通過本節(jié)課的學(xué)習(xí)，提高學(xué)生觀察、類比、分析和概括的能力．情感、態(tài)度與價值觀通過本節(jié)的學(xué)習(xí)，體驗研究解析幾何的基本思想，感受圓錐曲線在刻畫現(xiàn)實和解決實際問題中的作用，進(jìn)一步體會數(shù)形結(jié)合的思想．2. 教學(xué)重點/難點 教學(xué)重點雙曲線的定義及焦點及雙曲線標(biāo)準(zhǔn)方程．教學(xué)難點在推導(dǎo)雙曲線標(biāo)準(zhǔn)方程的過程中，如何選擇適當(dāng)?shù)淖鴺?biāo)系． 3. 教學(xué)用具 多媒體4. 標(biāo)簽
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊：8.4《圓》教學(xué)設(shè)計
教 學(xué) 過 程教師 行為學(xué)生 行為教學(xué) 意圖時間 *揭示課題 8．4 圓（二） *創(chuàng)設(shè)情境 興趣導(dǎo)入 【知識回顧】 我們知道，平面內(nèi)直線與圓的位置關(guān)系有三種（如圖8-21）： （1）相離：無交點； （2）相切：僅有一個交點； （3）相交：有兩個交點． 并且知道，直線與圓的位置關(guān)系，可以由圓心到直線的距離d與半徑r的關(guān)系來判別（如圖8-22）： （1）：直線與圓相離； （2）：直線與圓相切； （3）：直線與圓相交. 介紹 講解 說明 質(zhì)疑 引導(dǎo) 分析 了解 思考 思考 帶領(lǐng) 學(xué)生 分析 啟發(fā) 學(xué)生思考 0 15*動腦思考 探索新知 【新知識】 設(shè)圓的標(biāo)準(zhǔn)方程為 ， 則圓心C(a，b)到直線的距離為 ． 比較d與r的大小，就可以判斷直線與圓的位置關(guān)系． 講解 說明 引領(lǐng) 分析 思考 理解 帶領(lǐng) 學(xué)生 分析 30*鞏固知識 典型例題 【知識鞏固】 例6 判斷下列各直線與圓的位置關(guān)系： ⑴直線, 圓； ⑵直線,圓． 解?、?由方程知，圓C的半徑，圓心為． 圓心C到直線的距離為 , 由于，故直線與圓相交． ⑵ 將方程化成圓的標(biāo)準(zhǔn)方程，得 ． 因此，圓心為，半徑．圓心C到直線的距離為 , 即由于，所以直線與圓相交． 【想一想】 你是否可以找到判斷直線與圓的位置關(guān)系的其他方法？ *例7 過點作圓的切線，試求切線方程． 分析 求切線方程的關(guān)鍵是求出切線的斜率．可以利用原點到切線的距離等于半徑的條件來確定． 解 設(shè)所求切線的斜率為，則切線方程為 ， 即 ． 圓的標(biāo)準(zhǔn)方程為 ， 所以圓心，半徑． 圖8－23 圓心到切線的距離為 ， 由于圓心到切線的距離與半徑相等，所以 ， 解得 ． 故所求切線方程（如圖8-23）為 ， 即 或． 說明 例題7中所使用的方法是待定系數(shù)法，在利用代數(shù)方法研究幾何問題中有著廣泛的應(yīng)用． 【想一想】 能否利用“切線垂直于過切點的半徑”的幾何性質(zhì)求出切線方程？ 說明 強(qiáng)調(diào) 引領(lǐng) 講解 說明 引領(lǐng) 講解 說明 觀察 思考 主動 求解 思考 主動 求解 通過例題進(jìn)一步領(lǐng)會 注意 觀察 學(xué)生 是否 理解 知識 點 50
【高教版】中職數(shù)學(xué)拓展模塊：2.1《橢圓》優(yōu)秀教學(xué)設(shè)計
本人所教的兩個班級學(xué)生普遍存在著數(shù)學(xué)科基礎(chǔ)知識較為薄弱，計算能力較差，綜合能力不強(qiáng)，對數(shù)學(xué)學(xué)習(xí)有一定的困難。在課堂上的主體作用的體現(xiàn)不是太充分，但是他們能意識到自己的不足，對數(shù)學(xué)課的學(xué)習(xí)興趣高，積極性強(qiáng)。 學(xué)生在學(xué)習(xí)交往上表現(xiàn)為個別化學(xué)習(xí)，課堂上較為依賴?yán)蠋煹囊龑?dǎo)。學(xué)生的群體性小組交流能力與協(xié)同討論學(xué)習(xí)的能力不強(qiáng)，對學(xué)習(xí)資源和知識信息的獲取、加工、處理和綜合的能力較低。在教學(xué)中盡量分析細(xì)致，減少跨度較大的環(huán)節(jié)，對重要的推導(dǎo)過程采用板書方式逐步進(jìn)行，力求讓絕大多數(shù)學(xué)生接受。 1.理解橢圓標(biāo)準(zhǔn)方程的推導(dǎo)；掌握橢圓的標(biāo)準(zhǔn)方程；會根據(jù)條件求橢圓的標(biāo)準(zhǔn)方程，會根據(jù)橢圓的標(biāo)準(zhǔn)方程求焦點坐標(biāo). 2.通過橢圓圖形的研究和標(biāo)準(zhǔn)方程的討論，使學(xué)生掌握橢圓的幾何性質(zhì)，能正確地畫出橢圓的圖形，并了解橢圓的一些實際應(yīng)用。 1.讓學(xué)生經(jīng)歷橢圓標(biāo)準(zhǔn)方程的推導(dǎo)過程，進(jìn)一步掌握求曲線方程的一般方法，體會數(shù)形結(jié)合等數(shù)學(xué)思想；培養(yǎng)學(xué)生運(yùn)用類比、聯(lián)想等方法提出問題. 2.培養(yǎng)學(xué)生運(yùn)用數(shù)形結(jié)合的思想，進(jìn)一步掌握利用方程研究曲線的基本方法，通過與橢圓幾何性質(zhì)的對比來提高學(xué)生聯(lián)想、類比、歸納的能力，解決一些實際問題。 1.通過具體的情境感知研究橢圓標(biāo)準(zhǔn)方程的必要性和實際意義；體會數(shù)學(xué)的對稱美、簡潔美，培養(yǎng)學(xué)生的審美情趣，形成學(xué)習(xí)數(shù)學(xué)知識的積極態(tài)度. 2.進(jìn)一步理解并掌握代數(shù)知識在解析幾何運(yùn)算中的作用，提高解方程組和計算能力，通過“數(shù)”研究“形”，說明“數(shù)”與“形”存在矛盾的統(tǒng)一體中，通過“數(shù)”的變化研究“形”的本質(zhì)。幫助學(xué)生建立勇于探索創(chuàng)新的精神和克服困難的信心。
統(tǒng)編版三年級語文上第25課灰雀教學(xué)設(shè)計教案
《秋天的雨》是統(tǒng)編版教材三年級語文上冊第八單元的一篇精讀課文，課文講述了列寧、灰雀和一個孩子之間的故事。這個故事表達(dá)了列寧善解人意，對男孩的敬重、保護(hù)以及男孩的老實和天真。通過語言和行動來揭示人物的內(nèi)心世界，展現(xiàn)事件的開展進(jìn)程，是本篇課文在表達(dá)上的主要特點。在學(xué)習(xí)時，可以對話為重點，研讀課文，通過閱讀人物對話，揣摩體會人物不同的心情，感受列寧愛鳥更愛孩子的情感，懂得知錯就改是誠實的表現(xiàn)，同時產(chǎn)生保護(hù)鳥類等動物的環(huán)保意識。 1.會認(rèn)“寧、胸”等10個生字，會寫“郊、養(yǎng)”等13個生字。2.分角色朗讀課文，讀出對話的語氣。3.帶著問題，邊默讀邊推敲人物的內(nèi)心想法，體會列寧對男孩的尊重和呵護(hù)、男孩的誠實與天真。4.體會列寧的善解人意、循循善誘和對兒童的愛護(hù)，懂得做錯事情應(yīng)該改正的道理，同時教育學(xué)生要愛護(hù)動物。 1.教學(xué)重點：通過朗讀對話體會列寧、小男孩心理變化的過程。2.教學(xué)難點：能帶著問題，邊默讀邊揣摩人物內(nèi)心的想法。能體會列寧對男孩的尊重與呵護(hù)、男孩的誠實與天真。 2課時