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《祝福》說(shuō)課稿（二） 2021-2022學(xué)年統(tǒng)編版高中語(yǔ)文必修下冊(cè)
三、說(shuō)重點(diǎn)、難點(diǎn) 根據(jù)學(xué)生實(shí)際情況以及課文內(nèi)容特點(diǎn)，將重難點(diǎn)確定為：掌握運(yùn)用肖像描寫(xiě)、動(dòng)作描寫(xiě)、語(yǔ)言描寫(xiě)等塑造人物的方法。以正確的立場(chǎng)、理性的頭腦和敏銳的眼睛觀察思考，分析鑒別人物形象，體會(huì)經(jīng)典小說(shuō)中人物的不幸遭遇，從而提升對(duì)社會(huì)現(xiàn)實(shí)觀察、分析、判斷的能力。四、說(shuō)教學(xué)方法 1．教法根據(jù)學(xué)生的這些情況，我采用了以下的教法：⑴創(chuàng)設(shè)情境法。通過(guò)創(chuàng)設(shè)“探究祥林嫂之死”閱讀情境與任務(wù)，激發(fā)學(xué)生閱讀興趣，引導(dǎo)學(xué)生發(fā)揮主觀能動(dòng)性，逐層深入閱讀、鑒賞與探究。⑵點(diǎn)撥法。適當(dāng)點(diǎn)撥，引導(dǎo)學(xué)生回憶以往學(xué)過(guò)塑造人物形象的方法等相關(guān)知識(shí)。 ⑶當(dāng)堂訓(xùn)練法。通過(guò)讓學(xué)生用語(yǔ)言描述不同時(shí)期祥林嫂的眼睛特點(diǎn)，檢測(cè)學(xué)生的感悟情況，判斷學(xué)生對(duì)所學(xué)內(nèi)容的接受程度。2．學(xué)法本節(jié)課充分發(fā)揮學(xué)生主體作用，引導(dǎo)學(xué)生自主學(xué)習(xí)，探究式學(xué)習(xí)。具體方法如下：（1）課前預(yù)習(xí)（此文長(zhǎng)達(dá)萬(wàn)余字，難以做到在課堂上讓學(xué)生通讀全文，需要提前布置課前預(yù)習(xí)任務(wù)，培養(yǎng)學(xué)生閱讀的自覺(jué)性。）
第四單元《教學(xué)設(shè)計(jì)》 說(shuō)課稿 2021—2022學(xué)年統(tǒng)編版高中語(yǔ)文必修下冊(cè)
（六）說(shuō)教學(xué)策略1.專(zhuān)題性海量的媒介信息必須加以選擇或者整合，以項(xiàng)目為依據(jù)，進(jìn)行信息篩選，形成專(zhuān)題性閱讀與交流；培養(yǎng)學(xué)生對(duì)文本信息“化零為整”的能力，提升跨媒介閱讀與交流學(xué)習(xí)的充實(shí)感。2.情境化情境教學(xué)應(yīng)指向?qū)W生的應(yīng)用，建構(gòu)富有符合時(shí)代氣息的內(nèi)容，與生活經(jīng)驗(yàn)更加貼合，對(duì)學(xué)生的語(yǔ)言建構(gòu)與運(yùn)用有所提升，在情境中能夠有效地進(jìn)行交流。3.任務(wù)化以任務(wù)為導(dǎo)向的序列化學(xué)習(xí)，可以為學(xué)生構(gòu)建學(xué)習(xí)路線(xiàn)圖、學(xué)習(xí)框架等具體任務(wù)引導(dǎo)；或以跨媒介的認(rèn)識(shí)與應(yīng)用為任務(wù)的設(shè)置引導(dǎo)；甚至以閱讀和交流作為序列化安排的實(shí)踐引導(dǎo)。4.整合性跨媒介閱讀與交流是結(jié)合線(xiàn)上線(xiàn)下的資源，形成新的“超媒介”，也能實(shí)現(xiàn)對(duì)信息進(jìn)行“深加工”，多種媒介的信息整合只為一個(gè)核心教學(xué)內(nèi)容服務(wù)。5.互文性語(yǔ)言文字是語(yǔ)文之生命，我們是立足于語(yǔ)言文字的探討，音樂(lè)、圖像、視頻等文本與傳統(tǒng)語(yǔ)言文字文本形成互文，觸發(fā)學(xué)生對(duì)學(xué)習(xí)內(nèi)容立體化和具體化的感悟，提升學(xué)生的審美能力。
《蜀相》說(shuō)課稿（二） 2021-2022學(xué)年統(tǒng)編版高中語(yǔ)文選擇性必修下冊(cè)
2．體味詩(shī)人的人生際遇，感受詩(shī)人憂(yōu)國(guó)憂(yōu)民的愛(ài)國(guó)情操?！裰攸c(diǎn)、難點(diǎn)重點(diǎn)：感受、品味詩(shī)歌的意境。難點(diǎn)：對(duì)作者隱晦情感的把握。●解決辦法1．指導(dǎo)朗讀，強(qiáng)化背誦。建議學(xué)生課前完熟讀甚至背誦6首詩(shī)，這有助于學(xué)生初步了解詩(shī)意，以便較快進(jìn)人對(duì)詩(shī)作的理解，將教學(xué)重點(diǎn)放到把握、分析意境方面。2．提出問(wèn)題，重視體悟。精讀課要解決四個(gè)問(wèn)題：詩(shī)中寫(xiě)了什么，怎么寫(xiě)的，為什么寫(xiě)，這樣寫(xiě)的好處。聯(lián)想和想象是填補(bǔ)藝術(shù)空白、品賞意境的好辦法，就這一點(diǎn)，教師在精讀課上要做出示范，自讀課可把填補(bǔ)的任務(wù)交給學(xué)生。3．補(bǔ)充史料，做好總結(jié)。論世知人，有利于理解詩(shī)歌。教師可提供適當(dāng)?shù)谋尘百Y料。4．引導(dǎo)學(xué)生總結(jié)鑒賞詩(shī)歌的方法：解題、釋句、入境、會(huì)意。
《氓》說(shuō)課稿-2020-2021學(xué)年統(tǒng)編版高中語(yǔ)文選擇性必修下冊(cè)
“將子無(wú)怒”急于成婚，至于發(fā)怒，表現(xiàn)出急躁的性格特征；“二三其德”，又表現(xiàn)出他品德的敗壞;“言既遂矣，至于暴矣”婚后的暴躁，婚前的熱烈，婚后的離棄，兩相對(duì)照，則揭示了他的虛偽自私?？傊?，氓是個(gè)性情狂暴、違背諾言、始愛(ài)終棄、不負(fù)責(zé)任、自私的負(fù)心漢。設(shè)計(jì)意圖：用流行語(yǔ)概念引導(dǎo)學(xué)生去解讀不同作品中的人物，培養(yǎng)學(xué)生比較分析的能力。3、探究《氓》中造成女子婚姻悲劇和痛苦的原因有哪些？個(gè)人原因:①氓的三心二意，不負(fù)責(zé)任。文中說(shuō)“女也不爽，士貳其行”，女子怨恨的正是自己甘心貧困，辛苦操勞，多年如一日，但是最終還是被丈夫遺棄。②女子在經(jīng)濟(jì)上政治上處于附屬地位。她生活天地狹小，生活的幸福與否全寄托在丈夫身上。如果遇上個(gè)對(duì)感情對(duì)家庭不負(fù)責(zé)任的丈夫，那她的悲劇是不可避免的。③性格悲劇。在男權(quán)社會(huì)中，女子在婚前行為草率，她與氓的戀愛(ài)缺乏牢固的思想基礎(chǔ)，對(duì)氓的人品認(rèn)識(shí)不足，認(rèn)人不清導(dǎo)致的悲劇。社會(huì)的原因：
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)Where is the post office教案2篇
Period 2 (3a----Section B 2c)Preview(Pre-task): Key points: What laAdd another information about their pen pals----their language on the cardnguage does she/he speak?She/He speaks....Does she/he have any brothers and sisters? Does she/he speak English?Preview(Pre-task): Add another information about their pen pals----their language on the cardKey points: What language does she/he speak?She/He speaks....Does she/he have any brothers and sisters? Does she/he speak English?Step 1 Revision1.Revisionand dictation of the new words 2.Revise the drills they learned yesterday.(by pairwork and grammar exercise)Step 2 Leading-inT has a conversation with one student. The conversation is following:---Do you have a pen pal?---Yes, I do.---What's your pen pal's name? ---His/Her name is....---Where is your pen pal from? ---He/She is from...---Where does he/she live? ---He/She lives in....---What language does he/she speak?He/She speaks...Write the new words on the Bb. They are following: EnglishChineseJapaneseFrenchStep 3 LearnLearn the new words with the whole class.Finish 3a with the students3b Pairwork T still does an example with one student Then the Ss practise in pairs. The example is following:--Curry Muray is my pen pal. He is from the United States.---What language does he speak?
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)Don’t eat in class教案2篇
Don’t fight. =You can’t fight. （板書(shū)，教讀）教師把這些句子板書(shū)在黑板上，并請(qǐng)學(xué)生大聲整齊地讀祈使句和“can’t”句型，并讓學(xué)生注意兩種句型表達(dá)形式的不同和轉(zhuǎn)換,“Don’t …=You can’t…”;并對(duì)學(xué)生說(shuō)：These are our school rules. （板書(shū)，教讀） You can’t break the school rules. Don’t break the school rules.（板書(shū)，教讀）步驟3 :Practicea. T: Now, each of the students is breaking one of these rules.Please finish 1a.學(xué)生看圖，完成1a的內(nèi)容，檢查答案并大聲朗讀校規(guī)。b. 聽(tīng)錄音，完成1b，選出四位學(xué)生都違反了哪條校規(guī)；聽(tīng)之前，學(xué)生要讀會(huì)英文名。c. 請(qǐng)兩位學(xué)生朗讀1c部分的句型；要求學(xué)生兩人一組對(duì)話(huà)表演，SA扮演外校轉(zhuǎn)來(lái)新生，SB告知本校校規(guī)。（學(xué)生可經(jīng)過(guò)討論，多說(shuō)出他們想到的校規(guī)，不必只限于書(shū)上；教師應(yīng)給予幫助）2) 第二課時(shí)（2a~4）步驟1 :warming up of revisionT: What are the rules at your school?學(xué)生使用“can”或祈使句表達(dá)各條校規(guī)；其中老師可引出“eat in the cafeteria outside”的表達(dá)。步驟2 :Practicea.T: Christina is an exchange student. She doesn’t know the rules. Let’s listen, what activities they’re talking about?學(xué)生聽(tīng)第一遍時(shí)，完成2a；第二遍時(shí)，完成2b；b. 請(qǐng)學(xué)生領(lǐng)讀2c部分，看著2a完成的表格，理解2c活動(dòng)的要求；分成小組針對(duì)2a進(jìn)行問(wèn)答；
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)I ’d like some noodles教案
教學(xué)過(guò)程Step 1: warming-up Sing a song---------“food and drink” Step 2: Revision1 Dictation2 Revise: What kind of noodles would you like?I’d like …What size bowl of noodles would you like?I’d like…Step 3: Presentation1 show pictures of food, ask students say the words.2 Students read the newspaper ad in 3a. Fill in blanks with words in the box. Then read the ad together, the teacher explains some difficult language points.3 Check the answers Step 4 PracticeAsk students to finish 3b in the same way according to 3a. Students read the short passage and fill in the blanks .At last, check the answers.Step 5 productionAsk students to write their own ad for dumplings, noodles, drinks, and other foods they know. Then ask students to read their partner’s ad. Then order food and drink from their partner.Step 6 Home workGroup work – make an ad about “food and drink”
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)I want to be an actor教案2篇
三、教學(xué)建議第一課時(shí)：1. Lead in (Vocabulary)A) Before class, teacher should collect some pictures of working places. For example: Bank, TV Station, Restaurant, Police Station, Hospital ...B) In class, show students the pictures (PowerPoint, OHP). Ask students to tell the name of the working places and the name of the jobs.Shop assistant, doctor, actor, reporter, police office, waiter, bank clerk, studentC) Do exercise 1a and 3a.2. Bingo GameAsk groups of students to make up pairs of cards with a job on one and the related workplace on the other. For example, waiter / restaurant, teacher / school, doctor / hospital. Encourage students to use both the job / workplace combinations in the book and the ones that students came up during class discussions. Be sure they have twice as many sets of cards as there are students in the group. They can make two sets of cards for a single job / workplace, if necessary. Then have each group mix up its set of cards and hand their cards out in random order. Each time a student gets a pair of cards that match, he or she can lay these cards down. The goal is to have no cards in your hand at the end.3. Task OneA) Ask students to work in pairs and ask the partner what does he / she want to be in the future.e. g. :What do you / does he / does she want to be?I want to be a.Why?Because it's (adj).B) Vocabulary: Section B, 1a4. Homework 1.2.
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)Where did you go on vacation教案
句型: Where did you go on vacation? I went to summer camp．Did she go to Central Park？Yes，she did．No, she didn’t語(yǔ)法：一般過(guò)去時(shí)特殊疑問(wèn)句、一般疑問(wèn)句及肯、否定回答。課時(shí)安排4課時(shí)第一課時(shí)：Section A：la，1b，lc，2a，2b，2c 第二課時(shí)：Section A：3a，3b，4第三課時(shí)：Section B：1，2a，2b，2c第四課時(shí)：Section B：3a，3b，3c，4 and Self Check第一課時(shí)教學(xué)目標(biāo)掌握描寫(xiě)假期生活的形容詞。假期里自己所做事情的簡(jiǎn)單表達(dá)。談?wù)摷倨谧龅氖虑榧爱?dāng)時(shí)情況。談?wù)摷倨跁r(shí)旅游的天氣，旅游者以及食物等。教學(xué)過(guò)程一、導(dǎo)入播放一首英文歌曲：Let’s travel 說(shuō)明：通過(guò)讓學(xué)生聽(tīng)節(jié)奏歡快迪斯尼英語(yǔ)歌曲Let’s travel.引入本節(jié)課談?wù)摰脑?huà)題vacation and travel. 讓歌曲使學(xué)生的思維活躍，增強(qiáng)課堂氣氛，激發(fā)學(xué)生提高學(xué)習(xí)英語(yǔ)的興趣。T：How is the trip ?Ss : It’s pretty good/ happy/exciting /relaxing/busy/dangerous/ fantastic說(shuō)明：這個(gè)問(wèn)題是為了操練形容詞。建議讓多個(gè)Ss作答。鼓勵(lì)他們用不同的形容詞。上述個(gè)別形容詞本應(yīng)在第二課時(shí)中出現(xiàn)，但可以在warming-up中第一次非正式出現(xiàn)。這些形容詞也可在老師的評(píng)價(jià)語(yǔ)中適時(shí)出現(xiàn)，以加深學(xué)生對(duì)詞匯的印象。
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)Why do you like koalas教案2篇
單元整體說(shuō)明（一）單元教材分析本單元的核心話(huà)題是描述動(dòng)物和表達(dá)個(gè)人喜好，以及句式why do you like…? Because…。這也是本單元的教學(xué)重點(diǎn)。通過(guò)本單元的學(xué)習(xí)，學(xué)生應(yīng)能較流利地運(yùn)用所學(xué)詞匯和句型描述動(dòng)物，表達(dá)個(gè)人喜好。（二）單元知識(shí)結(jié)構(gòu)1．詞匯動(dòng)物名稱(chēng) tiger, elephant, koala, dolphin, etc．詞匯描述性形容詞: smart, cute, ugly, clever, shy, etc．國(guó)家名: Australia, South Africa2．句型Why do you like koala hears? Because they are cute．Where are pandas from? They're from China．What animals do you like? I like dolphins．（三）單元整體目標(biāo)1．Master the vocabulary2．Master and use: Why do you like koalas? Because they am cute．Where are pandas from? They're from China．What animals do you like? I like dolphins．（四）單元教學(xué)重難點(diǎn)一覽（五）單元學(xué)情分析學(xué)生此前已經(jīng)學(xué)過(guò)由why, where, what 引導(dǎo)的特殊疑問(wèn)句句型，具有了學(xué)習(xí)本單元知識(shí)的認(rèn)知前提。形形色色的動(dòng)物能激發(fā)學(xué)生的好奇心，產(chǎn)生了解它們的欲望，這有利于本單元知識(shí)的教學(xué)和學(xué)生學(xué)習(xí)興趣的培養(yǎng)。
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)How was your weekend教案2篇
Teaching Goal:1. General aims:Talk about recent past events2. Particular aims:A. Language Focus.Talk about recent past events and think of the past events.B. Language goalsHow was….?It was …What did …do over the weekend?C. Language structures:(1). How was your weekend? I was great. Pay attention to no form.(2). What did you do over the weekend? I played soccer. We went to the beach.D. Useful words and phrases:Words: was, did, went, beach, over, project, test, wasn’t, false, number, geography, spend, week, most, mixture, their, had, little, cook, read, saw, change, everyone, sit, sat, no, anythingPhrases: did one’s homework, played soccer, cleaned my room, went to the beach, played tennis, went to the movies, on Saturday morning, over the weekend, cook … for, what about, do some reading, have a party, talk show, go shoppingE. Grammar language:Present simple past tenseRegular and irregular verbsF. Learning strategies:Tour and holidaysG. Interdiscipinary:H. Emotion and manner:Teaching time: 5 periodsTeaching procedures:Period One教學(xué)步驟、時(shí)間 教師活動(dòng) 學(xué)生活動(dòng) 媒體應(yīng)用Step 1Free talk 3’ Ask some questions like:Who’s on duty today?What’s the weather like? Answer and talk about something.讓同學(xué)們回答下列問(wèn)題1. Do you like weekend? (Let some students answer)It takes them three minutes to talk about the question.2. Why do you like weekend? (let the students answer) Most of the students like the weekend此時(shí)教師用漢語(yǔ)問(wèn)：“在周末期間問(wèn)你干了什么?這句話(huà)用英語(yǔ)這么回答?Let the students guess.At last the teacher give them right answer3. What did you do over the weekend?(板書(shū)、學(xué)習(xí))
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)What does he look like教案3篇
所需要用到的句子：Who is that?That is Jack. I like him.Why do you like him?I like him because he is interesting.Task 4: 設(shè)計(jì)理想中的人類(lèi)Step one: 設(shè)計(jì)理想中的人類(lèi)的外貌。把全班同學(xué)分成若干小組，學(xué)生可以邊說(shuō)邊在紙上畫(huà)出他們的模樣。Step two: 設(shè)計(jì)理想中人類(lèi)的性格。學(xué)生們可以把那些能描述性格的單詞寫(xiě)在圖畫(huà)的旁邊。Step three: 每組選出一名同學(xué)，其他同組同學(xué)提問(wèn)，他作簡(jiǎn)單回答，并說(shuō)明原因。所需用到的句子：What does he or she look like?He or she ...What is he or she like?He or she is ...Why?Because ...Task 5: 挑戰(zhàn)性活動(dòng)調(diào)查性格是天生的還是后天形成的，讓每個(gè)同學(xué)回家去調(diào)查一下自己成長(zhǎng)過(guò)程中性格是否有變化，具體是怎樣的，為什么會(huì)這樣？ Teaching Aims:1. Enable students to have a general understanding of how to talk about people's physical appearance.2. Enable students to tackle some essential vocabularies and patterns about describing people. Provide them with necessary skills and methods.3. Create various chances for students to describe the persons they're familiar with, such as classmates, family members, teachers, idols, etc.
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)It’s raining教案2篇
1 Each group choose one place to describe and what you are doing in it Choose one place, and describe what they are doing 2 Move around the room and give suggestions Talk about it and write it down 3 Ask one to show their works and act it Choose one of each group to make a report 4 Evaluate the best group and the best reporter Choose the best one Homework Ask your friends their ideal place and write about it教學(xué)反思：新課程標(biāo)準(zhǔn)中強(qiáng)調(diào)學(xué)生在課堂中的主體地位，在綜合課中他們的主體地位就更加突出。在各個(gè)活動(dòng)中給不同程度的學(xué)生不同層次的任務(wù)，讓各層面的學(xué)生都有表現(xiàn)發(fā)揮的機(jī)會(huì)，從而產(chǎn)生對(duì)英語(yǔ)的興趣。使用照片圖片多媒體來(lái)輔助教學(xué)，效果更好。同時(shí)讓了解其他國(guó)家風(fēng)景，風(fēng)俗的同學(xué)介紹ideal place，增加學(xué)生的背景知知識(shí)，實(shí)現(xiàn)跨學(xué)科交流的目的。教案點(diǎn)評(píng)：采用任務(wù)型教學(xué)模式，在各個(gè)活動(dòng)中給不同程度的學(xué)生不同層次的任務(wù)，讓各層面的學(xué)生都有表現(xiàn)發(fā)揮的機(jī)會(huì)，從而產(chǎn)生對(duì)英語(yǔ)的興趣。使用照片圖片多媒體來(lái)輔助教學(xué)，效果更好。讓了解其他國(guó)家風(fēng)景，風(fēng)俗的同學(xué)介紹ideal place，增加學(xué)生的背景知識(shí)，實(shí)現(xiàn)跨學(xué)科交流的目的。
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)Where is your pen pal from教案
2.1Match the country with the language.Step II Reading3a? let the students read the letter fast and answer the questions.? Let the students ask more questions about the letter as possible as the can.Step III Writing3b.Step IV. Pairwork2cStep V Listening2a, 2bStep V. HomeworkExercises book(1) P3Exercises book (2) P3Period FourStep I . Dictate the words and sentences in Unit1.Step II. Self-checkStep III. Check the answers for Exercises book in the unit.Step IV. Home workRevise and preparation for unit 2.教學(xué)反思：通過(guò)本單元的學(xué)習(xí)，學(xué)生基本可以談?wù)撊藗兊膰?guó)籍，居住城市及其所說(shuō)的語(yǔ)言，通過(guò)書(shū)信方式去介紹自己并尋找筆友。但在涉及到國(guó)外的一些城市時(shí)，學(xué)生對(duì)這方面的知識(shí)相對(duì)欠缺，能介紹的城市并不多，也反應(yīng)出學(xué)生課前預(yù)習(xí)不充分，這跟學(xué)生學(xué)習(xí)條件也有關(guān)，大多數(shù)學(xué)生無(wú)法通過(guò)網(wǎng)絡(luò)獲取所需信息。因此，在以后的教學(xué)中要多指導(dǎo)學(xué)生通過(guò)計(jì)算機(jī)網(wǎng)絡(luò)獲取信息，拓寬知識(shí)面。
人教版新目標(biāo)初中英語(yǔ)七年級(jí)下冊(cè)What do you think of game shows教案
五、教學(xué)Section B-2c1. Pair work: What do you think of the belt/sunglasses/…? What does your father/mother/… think of your scarf/belt…?2. Group work（1）. Teacher shows some different kinds of school uniforms (制服)and asks : “ What do you think of your school uniforms? If you have a chance to choose your school uniforms, what kind would you like to choose?”（2）. Discuss in groups.（3）.Get some Ss to report in class.說(shuō)明：這一步旨在讓學(xué)生運(yùn)用已有的語(yǔ)言知識(shí)談?wù)搶?duì)事物的看法和意見(jiàn)，并簡(jiǎn)單闡明理由，培養(yǎng)學(xué)生的主動(dòng)思維能力和運(yùn)用英語(yǔ)的能力。六、教學(xué)拓展調(diào)查電視節(jié)目的收視率任務(wù)：調(diào)查你周?chē)娜藢?duì)現(xiàn)在各種電視節(jié)目的反響?；顒?dòng)過(guò)程：1．教師布置任務(wù)，讓學(xué)生調(diào)查周?chē)娜耍òㄋ挠H戚朋友和鄰居）喜歡收看哪方面的電視節(jié)目。2．學(xué)生進(jìn)行調(diào)查活動(dòng)，運(yùn)用本單元所學(xué)的句型What do you think of….? (Why?)What's your favorite game shows?What do you think of talk show?I doesn’t mind it.I like it.I love it.I can’t stand it.3．記錄下排在前10位的TV Program，填寫(xiě)調(diào)查表，比較其收視率。
北師大初中八年級(jí)數(shù)學(xué)下冊(cè)等腰三角形的判定與反證法教案
方法總結(jié)：本題結(jié)合三角形內(nèi)角和定理考查反證法，解此題關(guān)鍵要懂得反證法的意義及步驟．反證法的步驟是：(1)假設(shè)結(jié)論不成立；(2)從假設(shè)出發(fā)推出矛盾；(3)假設(shè)不成立，則結(jié)論成立．在假設(shè)結(jié)論不成立時(shí)要注意考慮結(jié)論的反面所有可能的情況．如果只有一種，那么否定一種就可以了，如果有多種情況，則必須一一否定．三、板書(shū)設(shè)計(jì)1．等腰三角形的判定定理：有兩個(gè)角相等的三角形是等腰三角形(等角對(duì)等邊)．2．反證法(1)假設(shè)結(jié)論不成立；(2)從假設(shè)出發(fā)推出矛盾；(3)假設(shè)不成立，則結(jié)論成立．解決幾何證明題時(shí)，應(yīng)結(jié)合圖形，聯(lián)想我們已學(xué)過(guò)的定義、公理、定理等知識(shí)，尋找結(jié)論成立所需要的條件．要特別注意的是，不要遺漏題目中的已知條件．解題時(shí)學(xué)會(huì)分析，可以采用執(zhí)果索因(從結(jié)論出發(fā)，探尋結(jié)論成立所需的條件)的方法.
北師大初中八年級(jí)數(shù)學(xué)下冊(cè)不等式的基本性質(zhì)教案
【類(lèi)型二】 根據(jù)不等式的變形確定字母的取值范圍如果不等式(a＋1)x＜a＋1可變形為x＞1，那么a必須滿(mǎn)足________．解析：根據(jù)不等式的基本性質(zhì)可判斷a＋1為負(fù)數(shù)，即a＋1＜0，可得a＜－1.方法總結(jié)：只有當(dāng)不等式的兩邊都乘(或除以)一個(gè)負(fù)數(shù)時(shí)，不等號(hào)的方向才改變．三、板書(shū)設(shè)計(jì)1．不等式的基本性質(zhì)性質(zhì)1：不等式的兩邊都加上(或減去)同一個(gè)整式，不等號(hào)的方向不變；性質(zhì)2：不等式的兩邊都乘(或除以)同一個(gè)正數(shù)，不等號(hào)的方向不變；性質(zhì)3：不等式的兩邊都乘(或除以)同一個(gè)負(fù)數(shù)，不等號(hào)方向改變．2．把不等式化成“x>a”或“x<a”的形式“移項(xiàng)”依據(jù)：不等式的基本性質(zhì)1；“將未知數(shù)系數(shù)化為1”的依據(jù)：不等式的基本性質(zhì)2、3.本節(jié)課學(xué)習(xí)不等式的基本性質(zhì)，在學(xué)習(xí)過(guò)程中，可與等式的基本性質(zhì)進(jìn)行類(lèi)比，在運(yùn)用性質(zhì)進(jìn)行變形時(shí)，要注意不等號(hào)的方向是否發(fā)生改變；課堂教學(xué)時(shí)，鼓勵(lì)學(xué)生大膽質(zhì)疑，通過(guò)練習(xí)中易出現(xiàn)的錯(cuò)誤，引導(dǎo)學(xué)生歸納總結(jié)，提升學(xué)生的自主探究能力.
北師大初中八年級(jí)數(shù)學(xué)下冊(cè)多邊形的內(nèi)角和與外角和教案
方法總結(jié)：解題的關(guān)鍵是由題意列出不等式求出這個(gè)少算的內(nèi)角的取值范圍．探究點(diǎn)二：多邊形的外角和定理【類(lèi)型一】 已知各相等外角的度數(shù)，求多邊形的邊數(shù)正多邊形的一個(gè)外角等于36°，則該多邊形是正()A．八邊形 B．九邊形C．十邊形 D．十一邊形解析：正多邊形的邊數(shù)為360°÷36°＝10，則這個(gè)多邊形是正十邊形．故選C.方法總結(jié)：如果已知正多邊形的一個(gè)外角，求邊數(shù)可直接利用外角和除以這個(gè)角即可．【類(lèi)型二】 多邊形內(nèi)角和與外角和的綜合運(yùn)用一個(gè)多邊形的內(nèi)角和與外角和的和為540°，則它是()A．五邊形 B．四邊形C．三角形 D．不能確定解析：設(shè)這個(gè)多邊形的邊數(shù)為n，則依題意可得(n－2)×180°＋360°＝540°，解得n＝3，∴這個(gè)多邊形是三角形．故選C.方法總結(jié)：熟練掌握多邊形的內(nèi)角和定理及外角和定理，解題的關(guān)鍵是由已知等量關(guān)系列出方程從而解決問(wèn)題．
北師大初中八年級(jí)數(shù)學(xué)下冊(cè)分式方程的應(yīng)用教案
解：(1)設(shè)第一次購(gòu)買(mǎi)的單價(jià)為x元，則第二次的單價(jià)為1.1x元，根據(jù)題意得14521.1x－1200x＝20，解得x＝6.經(jīng)檢驗(yàn)，x＝6是原方程的解．(2)第一次購(gòu)買(mǎi)水果1200÷6＝200(千克)．第二次購(gòu)買(mǎi)水果200＋20＝220(千克)．第一次賺錢(qián)為200×(8－6)＝400(元)，第二次賺錢(qián)為100×(9－6.6)＋120×(9×0.5－6.6)＝－12(元)．所以?xún)纱喂操嶅X(qián)400－12＝388(元)．答：第一次水果的進(jìn)價(jià)為每千克6元；該老板兩次賣(mài)水果總體上是賺錢(qián)了，共賺了388元．方法總結(jié)：本題具有一定的綜合性，應(yīng)該把問(wèn)題分解成購(gòu)買(mǎi)水果和賣(mài)水果兩部分分別考慮，掌握這次活動(dòng)的流程．三、板書(shū)設(shè)計(jì)列分式方程解應(yīng)用題的一般步驟是：第一步，審清題意；第二步，根據(jù)題意設(shè)未知數(shù)；第三步，根據(jù)題目中的數(shù)量關(guān)系列出式子，并找準(zhǔn)等量關(guān)系，列出方程；第四步，解方程，并驗(yàn)根，還要看方程的解是否符合題意；最后作答．
北師大初中八年級(jí)數(shù)學(xué)下冊(cè)分式的基本性質(zhì)教案
【類(lèi)型二】 分式的約分約分：(1)－5a5bc325a3bc4；(2)x2－2xyx3－4x2y＋4xy2.解析：先找分子、分母的公因式，然后根據(jù)分式的基本性質(zhì)把公因式約去．解：(1)－5a5bc325a3bc4＝5a3bc3（－a2）5a3bc3·5c＝－a25c；(2)x2－2xyx3－4x2y＋4xy2＝x（x－2y）x（x－2y）2＝1x－2y.方法總結(jié)：約分的步驟；(1)找公因式．當(dāng)分子、分母是多項(xiàng)式時(shí)應(yīng)先分解因式；(2)約去分子、分母的公因式．三、板書(shū)設(shè)計(jì)1．分式的基本性質(zhì)：分式的分子與分母都乘以(或除以)同一個(gè)不為零的整式，分式的值不變．2．符號(hào)法則：分式的分子、分母及分式本身，任意改變其中兩個(gè)符號(hào)，分式的值不變；若只改變其中一個(gè)符號(hào)或三個(gè)全變號(hào)，則分式的值變成原分式值的相反數(shù)．本節(jié)課的流程比較順暢，先探究分式的基本性質(zhì)，然后順勢(shì)探究分式變號(hào)法則．在每個(gè)活動(dòng)中，都設(shè)計(jì)了具有啟發(fā)性的問(wèn)題，對(duì)各個(gè)知識(shí)點(diǎn)進(jìn)行分析、歸納總結(jié)、例題示范、方法指導(dǎo)和變式練習(xí)．一步一步的來(lái)完成既定目標(biāo)．整個(gè)學(xué)習(xí)過(guò)程輕松、愉快、和諧、高效.