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北師大初中八年級數(shù)學下冊分式的乘除法教案
通常購買同一品種的西瓜時，西瓜的質(zhì)量越大，花費的錢越多，因此人們希望西瓜瓤占整個西瓜的比例越大越好．假如我們把西瓜都看成球形，并把西瓜瓤的密度看成是均勻的，西瓜的皮厚都是d，已知球的體積公式為V＝43πR3(其中R為球的半徑)，求：(1)西瓜瓤與整個西瓜的體積各是多少？(2)西瓜瓤與整個西瓜的體積比是多少？(3)買大西瓜合算還是買小西瓜合算？解析：(1)根據(jù)體積公式求出即可；(2)根據(jù)(1)中的結(jié)果得出即可；(3)求出兩體積的比即可．解：(1)西瓜瓤的體積是43π(R－d)3，整個西瓜的體積是43πR3；(2)西瓜瓤與整個西瓜的體積比是43π（R－d）343πR3＝（R－d）3R3；(3)由(2)知，西瓜瓤與整個西瓜的體積比是（R－d）3R3<1，故買大西瓜比買小西瓜合算．方法總結(jié)：本題能夠根據(jù)球的體積，得到兩個物體的體積比即為它們的半徑的立方比是解此題的關(guān)鍵．
八年級思想政治下冊自覺依法納稅教案
一、自覺依法納稅（二）我國稅收“取之于民，用之于民” 1、稅收的含義與基本特征 【學生活動】學生思考后回答。 【教師活動】稅收是國家為實現(xiàn)其職能，憑借其政治權(quán)力，依法無償?shù)厝〉秘斦杖氲幕拘问健?【教師活動】稅收具有強制性、無償性和固定性的基本特征。[1]強制性：不管你愿意還是不愿意，都必須交稅。[2]無償性：交了稅，沒有補償，更不會返還。[3]固定性：征稅是有標準的，不是無止境的，按標準收到一定數(shù)量即算完成納稅。 2、稅收的性質(zhì) 【教師活動】展示多媒體圖片，觀察稅收性質(zhì)是什么？ 【學生活動】分析圖片，稅收的性質(zhì)。 【教師活動】每個人都與稅收緊密地聯(lián)系在一起，我們天天享受到的公共物品，無不有賴于稅收。接受教育要有學校，看病要有醫(yī)院，出行要有道路，保障國家安全要有國防，防洪、發(fā)電要有水利工程，這些都要依靠國家的稅收來為公眾提供公共服務(wù)。 【教師活動】播放國家免費為新冠肺炎患者治療的視頻。 【教師活動】勞動人民是稅收的最終受益者，我國的稅收是取之于民、用之于民的新型稅收。
北師大版初中七年級數(shù)學下冊用關(guān)系式表示的變量間關(guān)系說課稿2篇
一.說教材我今天說課的內(nèi)容是義務(wù)教育課程標準北師大版七年級下冊第四單元第二節(jié)的《用關(guān)系式表示的變量間關(guān)系》。在上節(jié)課的學習中學生已通過分析表格中的數(shù)據(jù)，感受到變量之間的相依關(guān)系，并用自己的語言加以描述，初步具有了有條理的思考和表達的能力，為本節(jié)的深入學習奠定了基礎(chǔ)。二.說教學目標本節(jié)課根據(jù)新的教學理念和學生需要掌握的知識，確立本節(jié)課的三種教學目標：知識與能力目標：根據(jù)具體情況，能用適當?shù)暮瘮?shù)表示方法刻畫簡單實際問題中變量之間的關(guān)系，能確定簡單實際問題中函數(shù)自變量的取值范圍，并會求函數(shù)值。過程與方法目標：經(jīng)歷探索某些圖形中變量之間的關(guān)系的過程，進一步體會一個變量對另一個變量的影響，發(fā)展符號感。情感態(tài)度與價值觀目標：通過研究，學習培養(yǎng)抽象思維能力和概括能力，通過對自變量和因變量關(guān)系的表達，培養(yǎng)數(shù)學建模能力，增強應(yīng)用意識。
北師大版初中數(shù)學八年級下冊一元一次不等式與一次函數(shù)說課稿2篇
由于任何一個一元一次不等式都能寫成ax+b>0（或<0）的形式，而此式的左邊與一次函數(shù)y=ax+b的右邊一致，所以從變化與對應(yīng)的觀點考慮問題，解一元一次不等式也可以歸結(jié)為兩種認識：⑴從函數(shù)值的角度看，就是尋求使一次函數(shù)y=ax+b的值大于（或小于0）的自變量x的取值范圍。⑵從函數(shù)圖像的角度看，就是確定直線y=ax+b在x軸上（或下）方部分所有的點的橫坐標所構(gòu)成的集合。教學過程中，主要從以上兩個角度探討一元一次不等式與一次函數(shù)的關(guān)系。1、“動”―――學生動口說，動腦想，動手做，親身經(jīng)歷知識發(fā)生發(fā)展的過程。2、“探”―――引導(dǎo)學生動手畫圖，合作討論。通過探究學習激發(fā)強烈的探索欲望。3、“樂”―――本節(jié)課的設(shè)計力求做到與學生的生活實際聯(lián)系緊一點，直觀多一點，動手多一點，使學生興趣高一點，自信心強一點，使學生樂于學習，樂于思考。4、“滲”―――在整個教學過程中，滲透用聯(lián)系的觀點看待數(shù)學問題的辨證思想。
人教版新目標初中英語七年級下冊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教學步驟、時間 教師活動 學生活動 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.讓同學們回答下列問題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此時教師用漢語問：“在周末期間問你干了什么?這句話用英語這么回答?Let the students guess.At last the teacher give them right answer3. What did you do over the weekend?(板書、學習)
人教版新目標初中英語七年級下冊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)計理想中的人類Step one: 設(shè)計理想中的人類的外貌。把全班同學分成若干小組，學生可以邊說邊在紙上畫出他們的模樣。Step two: 設(shè)計理想中人類的性格。學生們可以把那些能描述性格的單詞寫在圖畫的旁邊。Step three: 每組選出一名同學，其他同組同學提問，他作簡單回答，并說明原因。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)性活動調(diào)查性格是天生的還是后天形成的，讓每個同學回家去調(diào)查一下自己成長過程中性格是否有變化，具體是怎樣的，為什么會這樣？ 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.
人教版新目標初中英語七年級下冊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?
人教版新目標初中英語七年級下冊Don’t eat in class教案2篇
Don’t fight. =You can’t fight. （板書，教讀）教師把這些句子板書在黑板上，并請學生大聲整齊地讀祈使句和“can’t”句型，并讓學生注意兩種句型表達形式的不同和轉(zhuǎn)換,“Don’t …=You can’t…”;并對學生說：These are our school rules. （板書，教讀） You can’t break the school rules. Don’t break the school rules.（板書，教讀）步驟3 :Practicea. T: Now, each of the students is breaking one of these rules.Please finish 1a.學生看圖，完成1a的內(nèi)容，檢查答案并大聲朗讀校規(guī)。b. 聽錄音，完成1b，選出四位學生都違反了哪條校規(guī)；聽之前，學生要讀會英文名。c. 請兩位學生朗讀1c部分的句型；要求學生兩人一組對話表演，SA扮演外校轉(zhuǎn)來新生，SB告知本校校規(guī)。（學生可經(jīng)過討論，多說出他們想到的校規(guī)，不必只限于書上；教師應(yīng)給予幫助）2) 第二課時（2a~4）步驟1 :warming up of revisionT: What are the rules at your school?學生使用“can”或祈使句表達各條校規(guī)；其中老師可引出“eat in the cafeteria outside”的表達。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?學生聽第一遍時，完成2a；第二遍時，完成2b；b. 請學生領(lǐng)讀2c部分，看著2a完成的表格，理解2c活動的要求；分成小組針對2a進行問答；
人教版新目標初中英語七年級下冊I ’d like some noodles教案
教學過程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”
人教版新目標初中英語七年級下冊I want to be an actor教案2篇
三、教學建議第一課時：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.
人教版新目標初中英語七年級下冊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教學反思：新課程標準中強調(diào)學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。在各個活動中給不同程度的學生不同層次的任務(wù)，讓各層面的學生都有表現(xiàn)發(fā)揮的機會，從而產(chǎn)生對英語的興趣。使用照片圖片多媒體來輔助教學，效果更好。同時讓了解其他國家風景，風俗的同學介紹ideal place，增加學生的背景知知識，實現(xiàn)跨學科交流的目的。教案點評：采用任務(wù)型教學模式，在各個活動中給不同程度的學生不同層次的任務(wù)，讓各層面的學生都有表現(xiàn)發(fā)揮的機會，從而產(chǎn)生對英語的興趣。使用照片圖片多媒體來輔助教學，效果更好。讓了解其他國家風景，風俗的同學介紹ideal place，增加學生的背景知識，實現(xiàn)跨學科交流的目的。
人教版新目標初中英語七年級下冊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.教學反思：通過本單元的學習，學生基本可以談?wù)撊藗兊膰幼〕鞘屑捌渌f的語言，通過書信方式去介紹自己并尋找筆友。但在涉及到國外的一些城市時，學生對這方面的知識相對欠缺，能介紹的城市并不多，也反應(yīng)出學生課前預(yù)習不充分，這跟學生學習條件也有關(guān)，大多數(shù)學生無法通過網(wǎng)絡(luò)獲取所需信息。因此，在以后的教學中要多指導(dǎo)學生通過計算機網(wǎng)絡(luò)獲取信息，拓寬知識面。
人教版新目標初中英語七年級下冊What do you think of game shows教案
五、教學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.說明：這一步旨在讓學生運用已有的語言知識談?wù)搶κ挛锏目捶ê鸵庖姡⒑唵侮U明理由，培養(yǎng)學生的主動思維能力和運用英語的能力。六、教學拓展調(diào)查電視節(jié)目的收視率任務(wù)：調(diào)查你周圍的人對現(xiàn)在各種電視節(jié)目的反響?；顒舆^程：1．教師布置任務(wù)，讓學生調(diào)查周圍的人（包括他的親戚朋友和鄰居）喜歡收看哪方面的電視節(jié)目。2．學生進行調(diào)查活動，運用本單元所學的句型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，填寫調(diào)查表，比較其收視率。
人教版新目標初中英語七年級下冊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語法：一般過去時特殊疑問句、一般疑問句及肯、否定回答。課時安排4課時第一課時：Section A：la，1b，lc，2a，2b，2c 第二課時：Section A：3a，3b，4第三課時：Section B：1，2a，2b，2c第四課時：Section B：3a，3b，3c，4 and Self Check第一課時教學目標掌握描寫假期生活的形容詞。假期里自己所做事情的簡單表達。談?wù)摷倨谧龅氖虑榧爱敃r情況。談?wù)摷倨跁r旅游的天氣，旅游者以及食物等。教學過程一、導(dǎo)入播放一首英文歌曲：Let’s travel 說明：通過讓學生聽節(jié)奏歡快迪斯尼英語歌曲Let’s travel.引入本節(jié)課談?wù)摰脑掝}vacation and travel. 讓歌曲使學生的思維活躍，增強課堂氣氛，激發(fā)學生提高學習英語的興趣。T：How is the trip ?Ss : It’s pretty good/ happy/exciting /relaxing/busy/dangerous/ fantastic說明：這個問題是為了操練形容詞。建議讓多個Ss作答。鼓勵他們用不同的形容詞。上述個別形容詞本應(yīng)在第二課時中出現(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價語中適時出現(xiàn)，以加深學生對詞匯的印象。
人教版新目標初中英語七年級下冊Why do you like koalas教案2篇
單元整體說明（一）單元教材分析本單元的核心話題是描述動物和表達個人喜好，以及句式why do you like…? Because…。這也是本單元的教學重點。通過本單元的學習，學生應(yīng)能較流利地運用所學詞匯和句型描述動物，表達個人喜好。（二）單元知識結(jié)構(gòu)1．詞匯動物名稱 tiger, elephant, koala, dolphin, etc．詞匯描述性形容詞: smart, cute, ugly, clever, shy, etc．國家名: 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）單元教學重難點一覽（五）單元學情分析學生此前已經(jīng)學過由why, where, what 引導(dǎo)的特殊疑問句句型，具有了學習本單元知識的認知前提。形形色色的動物能激發(fā)學生的好奇心，產(chǎn)生了解它們的欲望，這有利于本單元知識的教學和學生學習興趣的培養(yǎng)。
人教版新目標初中英語八年級下冊Have you ever been to an amusement park教案
（1）Have you ever been to …? Yes, I have. / Yes, I have ever been to …No, I haven’t. / No, I have never been to …（2）When did you go there? I went there last year. （3）I have never been to a water park. Neither have I. I have ever been to an amusement park. So have I. （4）How long have you been studying English? I’ve been studying English since nine o’clock. I’ve been studying English since I came back home. I’ve been studying English for five hours. （5）What’s that? It’s an amusement park in Japan. I’ve never been to an amusement park like it before. It’s fun to learn another language. Let’s go tonight. Isn’t this great?space museum, amusement park, water park, South America, Peru, Holland, European culture, tour guide, flight attendant, musical instrument, more than, be from, get to, take lessons, neither, discover, graduate, change
人教版新目標初中英語八年級下冊What should I do教案2篇
說明：在幫Li Lei提建議的同時，教育學生如何學好英語。第三課時教學目標1. 語言目標：a) 詞匯: Original, in style, haircut, the same as.b) 語言結(jié)構(gòu):My friend wears the same clothes and has the same haircut as I do.2. 能力目標:大多數(shù)學生能夠談?wù)撟约合矚g哪種服裝，提高查找信息的能力。3. 情感目標:學會如何與朋友相處，要有自己對時尚的看法。教學重點掌握一些重要詞匯。教學難點學會談?wù)搯栴}，并能提出書面建議?！艚虒W突破首先針對Erin的問題，提出個人的建議，模仿2c部分的對話展開雙人交際Pair-work；聽老師誦讀3a部分的信件，并找出LEFT OUT的問題所在；學生完成3b部分的內(nèi)容，給Left Out提出書面的建議；學以口頭形式提出自己目前存在的某個問題，講給大家聽，讓同學們給自己提出一個建議，并作筆錄；學生兩、三個人分成一組，隨意性地進行口語交際，談?wù)揚14的第4部分的某個問題，相互交換意見。
人教版新目標初中英語八年級下冊If you go to the party, you’ll have a great time教案2篇
區(qū)分賓語從句、定于從句和狀語從句賓語從句和狀語從句，都叫做主從復(fù)合句。賓語從句主要是中考必考的，是初中階段必掌握的從句，賓語從句主要是掌握三要素，所謂賓語從句，就是賓語在主從復(fù)合句當中充當賓語的一個句子，叫做賓語從句。主句的謂語動詞是及物動詞，后面如果是詞或者是短語的話，是簡單句，如果是句子的話，肯定是賓語從句。I know that he good at English.就是賓語從句，三要素，一要素是要注意連詞，連詞一共學了三類連詞，一類連詞是that口語當中可以省略，就像剛才說的那一句，I hear he is good at English.還有疑問代詞、疑問副詞，how where when，疑問代詞、疑問副詞。還有一類連詞weather是否的意思，不是狀語從句當中的如果，這一定要和如果區(qū)分開，這是是否。I don't know if he interested at English。賓語從句要注意if是連詞。第二要素是語序，要用陳述舉語序。比如說你家有幾口人，我們都說How many people are there in you family?但是這是簡單句，一旦說成賓語從句，你可以告訴我你家有幾口人嗎？Could you tell me how many people there are in you family ?
人教版新目標初中英語八年級下冊It’s a nice day, isn’t it教案2篇
"Hello! Welcome to English class! Introduce yourself. Meet your new classmates." That's what the teacher says. What do you say? "Oh no!" It can be difficult talking to new people. But it can be fun, and you can make friends. How do you do it? Make small talk. Small talk is polite conversation. "Wang Nan is a great pingpang player, isn't she?" "I'd love to meet her, wouldn't you?" "It's been raining a lot, hasn't it?" Tag questions are a form of polite speech. To make small talk successfully, you should know how to make them. You should also know what topics to talk about. Try to learn this unit carefully. The next time you're in English class, you'll find out. Making small talk's easy, isn't it? (“你好！歡迎你！請做一下自我介紹。認識一下你的新同學?！蓖ǔＴ谡n上老師會這樣說。你會說什么呢？“噢，不！”與陌生人談話太困難了。但是這也很有意思，并且你還能交到朋友。你該怎么做呢？閑聊。閑聊指得是禮貌的對話。“王楠是一個很棒的乒乓球運動員，不是嗎？”“我希望自己能認識她，你呢？“今年的雨水很多，不是嗎？”反意疑問句是一種禮貌用語。為了使得談話成功，你應(yīng)該知道怎樣去進行閑聊。你還應(yīng)該知道與不同的人該談?wù)撌裁礃拥脑掝}。認真的學習這個單元吧，下次在英語課上，你會發(fā)現(xiàn)與大家展開談話是一件很容易的事情，不信我們來試試。)
人教版新目標初中英語八年級下冊He said I was hard-working教案2篇
This activity introduces some new vocabulary and provide oral practice using the target language.Task 1 . Ask four students to stand in front of the class, and the teacher asks them the following questions as a reporter.1.What are you going to do when you grow up?2.What are you going to do next week?3.What are going to do after school?The students will give different answers, then ask a good student to report what they said.I am going to e a doctor.What did she say?----------She said she was going to be a doctor.I am going to have a party on Friday night.What did he say?-------He said he was going to have a party on Friday night.I am going to do my homework.What did she say ?------ She said she was going to do her homework.I am going home after school.What did she say?-----She said she was going home after school.Say In this unit we are going to learn to use words like to report what someone said.Task 2. Read the instructions. Then ask a student to read the four questions. And write the words on the Bb. Explain what soap opera is.Task 3. Ask the students to Look at the pictures, point out the TV screens in the picture. Ask one girl to read what Marcia said.What did Marcia say? She said She said she was having a surprise party for Lana on Friday night. Repeat the other pictures in the same way.Activity3. Listen and number the pictures in activity 1a.