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人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)How do you make a banana milk shake教案2篇
1. First, ... then, ... next, ... finally, ...首先，……然后，……接著，……最后，……這是英語(yǔ)中表達(dá)做某事的步驟的一種說(shuō)法。如果步驟較多，還可以說(shuō)：first-next-after that-later on-finally/at last通常你會(huì)聽(tīng)到說(shuō)英語(yǔ)國(guó)家的人在說(shuō) first, next, then, finally 和后面的內(nèi)容時(shí)，他們會(huì)做一些停頓。這樣就能提前告訴聽(tīng)者接下來(lái)講的是一系列的步驟。這一點(diǎn)在朗讀和聽(tīng)力中應(yīng)特別注意。2. how many, how much均為疑問(wèn)詞，同是“多少”，但用法不同。請(qǐng)看：how many修飾可數(shù)名詞復(fù)數(shù)，how much修飾不可數(shù)名詞。但在用法上，同學(xué)們常犯如下錯(cuò)誤：1) [誤] How many are there bananas on the table?[正] How many bananas are there on the table?[析] how many, how much 中的many，much是形容詞，常修飾名詞作定語(yǔ)，故后面跟名詞。2) [誤]How much tea are there on the table?[正]How much tea is there on the table?[析] how much修飾不可數(shù)名詞時(shí)，謂語(yǔ)動(dòng)詞用單數(shù)。how many與how much的區(qū)別可簡(jiǎn)記為：前how many：?jiǎn)枴岸嗌佟?，?fù)數(shù)名詞后面跑；how much問(wèn)“多少”，不可數(shù)名詞單數(shù)好。前者答語(yǔ)用基數(shù)詞，后者答語(yǔ)用數(shù)量關(guān)系。
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)How was your school trip教案2篇
“Go for it!” is based on “Task-Based Language Teaching”. It adheres to “The authenticity principle”, “The form-function principle”, “The task dependency principle” and “The principle of learning by doing”. These principles all accord with the demands of curriculum focus.In and of Grade Seven (II), “Go for it!”, students have learned “The Simple Past Tense”. And it appears again in of Grade Eight (I). teaches students more about how to talk about events in the past. In addition, it gives affirmative and negative statements in the past tense, such as the sentence patterns “Did you see …?” “Were there …?” “Did you go …?” As the first part of Unit 8, Section A opens with a picture presenting the last school trip in the aquarium and continues with several step-by-step practice activities, which are all good for students to master “The Simple Past Tense”. Doing well in Section A will help students integrate the new target language with that in Section B. Thus, they can describe the events in the past freely and foster their own ability of reflecting and practicing. II. Teaching ObjectivesTeaching objective is the beginning and aim of teaching activities. According to the overall goal of the English elementary course--- improve students' synthetic ability of language application, which should be based on the development of students’ “Language knowledge”, “Language skills”, “Character building”, “Learning strategies” and “Cross-cultural awareness”. The teaching objectives are described as follows(I). Knowledge objectivesi. Master the simple past tense of regular and irregular verbsii. Recite the new words and expressions about the last school trip in the aquarium, including their pronunciation and intonation
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)Could you please clean your room教案3篇
一、 教學(xué)內(nèi)容Section A 1a----1c二、 教學(xué)目標(biāo)1.學(xué)習(xí)詞匯do the dishes, make the bed, take out the trash, fold the clothes, do the laundry, sweep the floor, clean the living room.2.句型 Could you please clean your room? Yes, sure.三、 教學(xué)準(zhǔn)備 學(xué)生預(yù)習(xí)本單元所有的詞匯多媒體課件 活動(dòng)表 獎(jiǎng)品四、 教學(xué)過(guò)程Pre-task1. Warming upEnjoy ourselves. Watch cartoon Cinderella. 看動(dòng)畫(huà)片段《灰姑娘》導(dǎo)如入本課話題和新詞匯“chores”美麗善良的鬼姑娘因繼母的嫉妒，每天得做所有的家務(wù)。片段的主題使學(xué)生聯(lián)想到本課的話題。2. learn new words and phrasesLook! What is she / he dong? 看圖學(xué)習(xí)動(dòng)詞詞組do chores, do the dishes, make the bed, take out the trash, fold the clothes, do the laundry, clean the living room.3. Guessing game.What is she doing ? 4. Pair work. 1a, Do you do these things at home? Write “Y” for “yes” and “N” for “no”.5. Listening . 1b , Peter’s chores or Mom’s chores?理解目標(biāo)語(yǔ)Could you please clean your room? Yes, sure.Write “M” for Mom’s chores, “P” for Peter’s chores in the chart.6. PairworkLook at the picture,Ask your partner to do the chores that you see. 7. Interview Who is the most able at home? 1) What chores do you do at home? How often do you do the chores? Work in four, interview each of the students in the group, fill in the chart.
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)What are you doing for vacation教案2篇
Teaching goals : 1. Words & phrases: babysit ,get back , fishing , rent , think about , decide(on) , tourist etc. 2. How to talk about future plans . 3. 現(xiàn)在進(jìn)行時(shí)表示將來(lái)計(jì)劃或行動(dòng). 4. 特殊疑問(wèn)句（where , when , how long引導(dǎo)） Important and difficult points : Drills :What are you doing for vacation ? I’m watching TV . When are you going ? I’m going … . How long are you staying ? We’re staying for five days . Teaching aids : cards and a tape ,a large wall calendar . Period 1 Teaching procedures : Step 1Leading in1. Free talk . 2. Put up the wall calendar . T: I’m staying home on Saturday (pointing to next Saturday ).Ss repeat . Ss: I’m staying home on Saturday . T: OK. Today we’ll learn how to talk about future plans. Step 2Pre-task SB Page 13 , 1a . 1. Look at the picture carefully and tell what you see in the picture . 2. Write the activities from the pictures in the box and add some more . 3. Practice reading . Step 3While-task1. Using the activities we write in 1a to make conversations .For example :What are you doing for vacation ? I’m visiting my uncle . 2. Pairwork .Practice in pairs . 3. 用第三人稱練習(xí)對(duì)話.
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)I’m going to be a basketball player教案3篇
教學(xué)目標(biāo)1.知識(shí)目標(biāo)：（1）學(xué)習(xí)What are you going to be when you grow up?/How are you going to do that?句式。（2）學(xué)會(huì)用英語(yǔ)描述有關(guān)職業(yè)的表達(dá)法。2.能力目標(biāo)：（1）能夠談?wù)摓閷?shí)現(xiàn)理想所做出的打算和安排。（2）能夠談?wù)撐磥?lái)自己與他人理想的職業(yè)及原因。（3）能用英語(yǔ)描述課余時(shí)間的活動(dòng)安排，最終具備表達(dá)綜合信息的能力。3.情感目標(biāo)：新學(xué)期到來(lái)之際，讓他們?cè)趯W(xué)習(xí)、體育、飲食、特長(zhǎng)、讀書(shū)等方面制定計(jì)劃，教育學(xué)生合理安排自己的課外生活，思考自己的理想職業(yè)及適合自己的職業(yè)。教學(xué)重點(diǎn)、難點(diǎn)本單元的重點(diǎn)為“be going to”表將來(lái),want to be, what,where, when,how引導(dǎo)的特殊疑問(wèn)句。難點(diǎn)是語(yǔ)言目標(biāo)的實(shí)現(xiàn)。教材分析本單元以I am going to be a basketball player為話題，共設(shè)計(jì)了三部分的內(nèi)容：一、Section A該部分有4個(gè)模塊。第一模塊圍繞Do you think these jobs are interesting?這一話題展開(kāi)思維（1a）、聽(tīng)力（1b）、口語(yǔ)（1c）訓(xùn)練；
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)I’m more outgoing than my sister教案2篇
1 交通工具的比較此活動(dòng)為小組活動(dòng)。學(xué)生通過(guò)討論找出到達(dá)某一城市可乘坐的各種交通工具，并選擇最佳出行方式。Teacher:We’re going to Shanghai. How many ways can we use to get there? Yes, there are four ways: by bus, by plane, by train, by ship. Please discuss how you are going to get there.操作建議：（1）學(xué)生以小組為單位展開(kāi)活動(dòng)，談?wù)摫窘M所選擇的交通工具。（2）各組選代表向全班匯報(bào)，闡述本組所選擇的交通工具的利和弊。完成任務(wù)所需要的語(yǔ)言結(jié)構(gòu)：We can go there by ship. It’s more comfortable and cheaper than any other transportation.We can go there by bus. It’s cheaper but it takes longer time.2 哪個(gè)城市更合適？此活動(dòng)具有挑戰(zhàn)性。假設(shè)中國(guó)要舉行2014年世界杯足球賽，分別從歷史，人文，天氣等方面對(duì)各城市（北京，大連，上海，昆明）進(jìn)行比較，選擇最佳舉辦城市。T: Imagine China is holding the 2014 FIFA World Cup. Which city do you think is the best for the World Cup, Beijing, Dalian, Shanghai or Kunming? Let’s work in groups. If you choose Beijing, please join the Team Red. If you chose Dalian, please join the Team White. If you choose Shanghai, please join the Team Blue. If you choose Kunming, please join the Team Green. Please show us its advantages. Then let’s see which team will win.
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)What’s the best radio station教案2篇
教學(xué)重點(diǎn)和難點(diǎn)：運(yùn)用所掌握的語(yǔ)言描述，比較不同地點(diǎn)的特點(diǎn)。在練習(xí)中學(xué)習(xí)掌握英語(yǔ)比較級(jí)和最高級(jí)的用法。課前準(zhǔn)備分配小組,每組五至六人。通過(guò)上網(wǎng)或翻閱報(bào)刊雜志等方法，確定旅游線路，做出基本的旅游計(jì)劃。教學(xué)設(shè)計(jì)：本節(jié)課流程圖 學(xué)法指導(dǎo)：1．由于這是一堂新課，在教學(xué)中應(yīng)注意面向全體，發(fā)揮學(xué)生的主體性，引導(dǎo)學(xué)生積極參與，激發(fā)學(xué)生的求知欲和學(xué)習(xí)積極性，指導(dǎo)學(xué)生積極思維，主動(dòng)獲取知識(shí)，養(yǎng)成良好的學(xué)習(xí)方法。逐步學(xué)會(huì)獨(dú)立解決問(wèn)題。總之要盡可能調(diào)動(dòng)學(xué)生的非智力因素促進(jìn)智力因素的發(fā)展。教法選擇：1．電化教學(xué)法2．課堂討論法3．任務(wù)型教學(xué)法采用這些方法的目的是為了充分調(diào)動(dòng)學(xué)生的學(xué)習(xí)積極性，使學(xué)生變被動(dòng)學(xué)習(xí)為主動(dòng)學(xué)習(xí)。通過(guò)電腦形象的演示，加強(qiáng)印象，提高興趣，突破難點(diǎn)，提高教學(xué)效率，進(jìn)而增大教學(xué)的容量和信息量。充分體現(xiàn)教師為主導(dǎo)，學(xué)生為主體的教學(xué)原則。
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)What’s the matter教案2篇
She shouldn’t go to the party tonight.Step7. TaskT: You know, there are lots of problems in our life. If you are a doctor, please tell us how to solve the problem. I will divide you into 9 groups. Please work in groups. And then choose one of you to report your ideas.The following are the problems:I have a toothache.I am hungry. I have a sore throat.I am stressed out. I have a sore back.I am tired. I can’t sleep.I have a cold. I have a headache.Report: If you have a headache, you should go to bed early. You should see the doctor. You should eat some medicine. You shouldn’t wash your face with cold water.You shouldn’t sleep late.You shouldn’t swim.…..T encourages the students to give advice as much as possible.Homework:1. Chose one of the problems, and write down your advice2. Copy the new words這一步是用于熱身的,同時(shí)也可以讓他們復(fù)習(xí)一部分的表示人體部位的單詞,擴(kuò)充知識(shí).學(xué)習(xí)語(yǔ)言的過(guò)程也是一個(gè)不斷積累的過(guò)程,復(fù)習(xí)舊知識(shí),增添新知識(shí).通過(guò)小游戲,強(qiáng)化學(xué)生對(duì)Does she/he have…這個(gè)句子的運(yùn)用能力.通過(guò)復(fù)習(xí)，自然的引到下面新知識(shí)的學(xué)習(xí)。充分利用表格,由句子到對(duì)話,再到文章,讓學(xué)生循序漸進(jìn). 提高學(xué)生的綜合語(yǔ)言運(yùn)用能力,運(yùn)用以前學(xué)過(guò)的知識(shí)來(lái)解決身邊的問(wèn)題.Period 5 (Section B 3a—3c, selfcheck)教學(xué)內(nèi)容與分析:
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)Can you come to my party教案3篇
Step 3 (3b)First, tell the students when we talk about our future plans, we often use: I’m+verb+ing When we talk about what we must do, we use have to. Ask the students to fill in the blanks in 3b. The answers are: shopping, go to see, a test, I’m going, my family. Step 4 (3c)Let the students write an e-mail message to a friend. Say why you can’t visit next. Before the exercise, ask the students to give some possible answers and write them on the blackboard. So the students will feel easy to finish the writing exercise. After they finish it, Let them to correct it in groups first. Each group chooses theirs best one to read in front of the whole class. Step 5 ( planning a party )First read the conversation in the box together. Then ask the students to turn to page 88.Write down everything you have to do next week. Write in all the things you have to do . Ask the students to look at the list. Ask them “What day are you free?” This is when you can have your party. Step 6 (Self check 1 )Let the students to fill in the blanks with the words given. Change the forms of the words if possible. Then make their own sentences. The answers are: visit, playing, have to, study, comeStep 7 (Self check 2)Imagine you are Marie. Read the information and look at your schedule. Write replies to the invitation.
人教版新目標(biāo)初中英語(yǔ)八年級(jí)上冊(cè)How do you get to school教案2篇
Step Ⅶ Role play ( Work on 1b)1. First ask two students to read the dialogue to the class.Sa: How do you get to school?Sb: Well, I ride my bike to the subway station. Then I take the subway.2. Now work with a partner.Suppose you use two kinds of transportation to get to school \Hangzhou\Beijing... (bus, train, subway, walking, bike, etc.) Tell how you get there. You may use the phrases in 1a.3. Then ask different pairs of students to present their conversations to the class.Step ⅧListening1. Work on 2a(1) First ask students to read the list of information that Thomas wants to know.…where Nina lives.…h(huán)ow far from school she lives.…h(huán)ow long it takes to get to school.…h(huán)ow she gets to school.…what she thinks of the transportation.(2) Tell students what transportation and bus stop mean.bus stop 汽車站 transportation n. 運(yùn)送；運(yùn)輸Then tell students we'll hear a recording. Please put a checkmark in front of each thing that Thomas wants to know.(3) Now play the recording for students.( Have students pay attention to the sample answer.) (4) Then correct the answers.
二年級(jí)上冊(cè)人教版語(yǔ)文古詩(shī)兩首說(shuō)課稿
二、說(shuō)教學(xué)目標(biāo) 此詩(shī)的教學(xué)目的是： 1.訓(xùn)練學(xué)生行行朗讀，字字思考，推敲詩(shī)文的意思;啟發(fā)學(xué)生處處想象，揣摩詩(shī)的意境，體會(huì)詩(shī)人的感受?！ ?.指導(dǎo)朗讀，要求在朗讀中傳達(dá)出對(duì)詩(shī)意的理解，對(duì)詩(shī)境的感悟?！ ?.激發(fā)學(xué)生學(xué)習(xí)古詩(shī)的興趣?！ ∪?、說(shuō)教學(xué)方法 (一)、研究題意，自讀自學(xué) 1.出示課題。啟發(fā)學(xué)生從課題確定這首詩(shī)所寫的時(shí)間、地點(diǎn)和事情，并推想人物。教師隨學(xué)生回答，在黑板上用簡(jiǎn)筆畫(huà)畫(huà)出月亮、星星、山巒、寺廟;此時(shí)，只簡(jiǎn)畫(huà)一座寺廟，沒(méi)有樓;為了顯示高度，在山腰上端橫一筆云。同時(shí)出示“宿”“寺”卡片，正音、釋義。 【畫(huà)簡(jiǎn)筆畫(huà)的目的是引導(dǎo)學(xué)生進(jìn)入詩(shī)的意境，教給學(xué)生據(jù)文想象的方法，為理解詩(shī)意奠定基礎(chǔ)。為了充分運(yùn)用課文插圖，板畫(huà)構(gòu)圖力求與插圖相仿?！俊 ?.讓學(xué)生觀察板畫(huà)，再觀賞插圖，然后要求他們用一個(gè)詞來(lái)表達(dá)自己的感覺(jué)。教師在學(xué)生提出的詞中選取“高”，并板書(shū)。告訴學(xué)生：這首詩(shī)是唐朝詩(shī)人李白寫自己夜宿山寺的親身感受;全詩(shī)四行詩(shī)句，都是圍繞著“高”來(lái)寫的。
人教版新目標(biāo)初中英語(yǔ)七年級(jí)上冊(cè)Good morning說(shuō)課稿
1.課堂活動(dòng)中的競(jìng)賽制：以記獎(jiǎng)評(píng)優(yōu)的形式無(wú)聲的評(píng)價(jià)每一個(gè)活動(dòng)，包括個(gè)體和小群體。在第一課時(shí)評(píng)最佳演員和導(dǎo)演獎(jiǎng)，第二課時(shí)評(píng)最佳團(tuán)體獎(jiǎng)，既節(jié)約時(shí)間又明確有效。使學(xué)生能提高語(yǔ)言質(zhì)量，增強(qiáng)參與意識(shí)，提高學(xué)習(xí)興趣。2. 教師課堂上語(yǔ)言、表情激勵(lì)制：在課堂活動(dòng)中教師要樂(lè)于 、善于用激勵(lì)性語(yǔ)言。從good, super, smart, excellent , great ,wonderful等，用微笑，皺眉，搖頭、點(diǎn)頭等身體語(yǔ)言對(duì)于學(xué)生的評(píng)價(jià)是方便又有效的途徑。3.課后作業(yè)評(píng)價(jià)：口頭作業(yè)在第二天課堂上表演，接受全體同學(xué)的評(píng)價(jià)。筆頭作業(yè)有教師批閱，以評(píng)語(yǔ)的方式出現(xiàn)。優(yōu)秀作業(yè)予以展出或交流。積極地肯定和鼓勵(lì)學(xué)生是我們?cè)u(píng)價(jià)的重要目的之一。4.單元結(jié)束后綜合性評(píng)價(jià):除了筆試以外，也可以根據(jù)學(xué)生實(shí)際開(kāi)展豐富的活動(dòng)，如：調(diào)查報(bào)告、小品表演、專題演講等。
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)普查和抽樣調(diào)查教案2
1.舉例說(shuō)明什么時(shí)候用普查的方式獲得數(shù)據(jù)較好，什么時(shí)候用抽樣調(diào)查的方式獲得數(shù)據(jù)較好？2、下列調(diào)查中分別采用了那些調(diào)查方式？⑴為了了解你們班同學(xué)的身高，對(duì)全班同學(xué)進(jìn)行調(diào)查.⑵為了了解你們學(xué)校學(xué)生對(duì)新教材的喜好情況，對(duì)所有學(xué)號(hào)是5的倍數(shù)的同學(xué)進(jìn)行調(diào)查。3、說(shuō)明在以下問(wèn)題中，總體、個(gè)體、樣本各指什么？⑴為了考察一個(gè)學(xué)校的學(xué)生參加課外體育活動(dòng)的情況，調(diào)查了其中20名學(xué)生每天參加課外體育活動(dòng)的時(shí)間.⑵為了了解一批電池的壽命，從中抽取10只進(jìn)行實(shí)驗(yàn)。⑶為了考察某公園一年中每天進(jìn)園的人數(shù)，在其中的30天里對(duì)進(jìn)園的人數(shù)進(jìn)行了統(tǒng)計(jì)。通過(guò)本節(jié)課的學(xué)習(xí)，同學(xué)們有什么收獲和疑問(wèn)？1、基本概念：⑴.調(diào)查、普查、抽樣調(diào)查.⑵.總體、個(gè)體、樣本.2、何時(shí)采用普查、何時(shí)采用抽樣調(diào)查，各有什么優(yōu)缺點(diǎn)？
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)多邊形和圓的初步認(rèn)識(shí)教案2
1、 如圖4-25，將一個(gè)圓分成三個(gè)大小相同的扇形，你能算出它們的圓心角的度數(shù)嗎？你知道每個(gè)扇形的面積和整個(gè)圓的面積的關(guān)系嗎？與同伴進(jìn)行交流2、 畫(huà)一個(gè)半徑是2cm的圓，并在其中畫(huà)一個(gè)圓心為60º的扇形，你會(huì)計(jì)算這個(gè)扇形的面積嗎？與同伴交流。教師對(duì)答案進(jìn)行匯總，講解本題解題思路：1、 因?yàn)橐粋€(gè)圓被分成了大小相同的扇形，所以每個(gè)扇形的圓心角相同，又因?yàn)閳A周角是360º，所以每個(gè)扇形的圓心角是360º÷3=120º，每個(gè)扇形的面積為整個(gè)圓的面積的三分之一。2、 先求出這個(gè)圓的面積S=πR²=4π，60÷360=1/6扇形面積=4π×1/6=2π/3【設(shè)計(jì)意圖】運(yùn)用小組合作交流的方式，既培養(yǎng)了學(xué)生的合作意識(shí)和能力，又達(dá)到了互幫互助以弱帶強(qiáng)的目的，使學(xué)習(xí)比較吃力的同學(xué)也能參與到學(xué)習(xí)中來(lái)，體現(xiàn)了學(xué)生是學(xué)習(xí)的主體。
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)比較線段的長(zhǎng)短教案2
教學(xué)反思： 1．本課時(shí)設(shè)計(jì)的主導(dǎo)思想是：將數(shù)形結(jié)合的思想滲透給學(xué)生，使學(xué)生對(duì)數(shù)與形有一個(gè)初步的認(rèn)識(shí)．為將來(lái)的學(xué)習(xí)打下基礎(chǔ)，這節(jié)課是一堂起始課，它為學(xué)生的思維開(kāi)拓了一個(gè)新的天地．在傳統(tǒng)的教學(xué)安排中，這節(jié)課的地位沒(méi)有提到一定的高度，只是交給學(xué)生比較線段的方法，沒(méi)有從數(shù)形結(jié)合的高度去認(rèn)識(shí)．實(shí)際上這節(jié)課大有可講，可以挖掘出較深的內(nèi)容．在教知識(shí)的同時(shí)，交給學(xué)生一種很重要的數(shù)學(xué)思想．這一點(diǎn)不容忽視，在日常的教學(xué)中要時(shí)時(shí)注意．2．學(xué)生在小學(xué)時(shí)只會(huì)用圓規(guī)畫(huà)圓，不會(huì)用圓規(guī)去度量線段的大小以及截取線段，通過(guò)這節(jié)課，學(xué)生對(duì)圓規(guī)的用法有一個(gè)新的認(rèn)識(shí)．3．在課堂練習(xí)中安排了度量一些三角形的邊的長(zhǎng)度，目的是想通過(guò)度量使學(xué)生對(duì)“兩點(diǎn)之間線段最短”這一結(jié)論有一個(gè)感性的認(rèn)識(shí)，并為下面的教學(xué)做一個(gè)鋪墊．
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)從三個(gè)方向看物體的形狀教案1
1．經(jīng)歷從不同方向觀察物體的活動(dòng)過(guò)程，發(fā)展空間觀念．2．在觀察的過(guò)程中，初步體會(huì)從不同方向觀察同一物體可能看到不同的形狀．3．能識(shí)別從三個(gè)方向看到的簡(jiǎn)單物體的形狀，會(huì)畫(huà)立方體及簡(jiǎn)單組合體從三個(gè)方向看到的形狀，并能根據(jù)看到的形狀描述基本幾何體或?qū)嵨镌停?、情境?dǎo)入觀察圖中不同方向拍攝的廬山美景．你能從蘇東坡《題西林壁》詩(shī)句：“橫看成嶺側(cè)成峰，遠(yuǎn)近高低各不同．不識(shí)廬山真面目，只緣身在此山中．”體驗(yàn)出其中的意境嗎？你能挖掘出其中蘊(yùn)含的數(shù)學(xué)道理嗎？讓我們一起探索新知吧！二、合作探究探究點(diǎn)一：從不同的方向看物體如圖所示的幾何體是由一些小正方體組合而成的，從上面看到的平面圖形是()解析：這個(gè)幾何體從上面看，共有2行，第一行能看到3個(gè)小正方形，第二行能看到2個(gè)小正方形．故選D.
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)代數(shù)式的求值教案2
解 由題意可得，今年的年產(chǎn)值為a·(1＋10%) 億元，于是明年的年產(chǎn)值為a·(1＋10%)·(1＋10%)＝ 1．21a（億元）．若去年的年產(chǎn)值為2億元，則明年的年產(chǎn)值為1．21a ＝1．21×2 ＝ 2．42（億元）．答：該企業(yè)明年的年產(chǎn)值將能達(dá)到1．21a億元．由去年的年產(chǎn)值是2億元，可以預(yù)計(jì)明年的年產(chǎn)值是2．42億元．例3 當(dāng)x＝－3時(shí)，多項(xiàng)式mx3＋nx－81的值是10，當(dāng)x ＝ 3時(shí)，求該代數(shù)式的值．解 當(dāng)x＝－3時(shí)，多項(xiàng)式mx3＋nx－81＝－27m－3n－81, 此時(shí)－27m－3n－81＝10, 所以27m＋3n＝－91．則當(dāng)x＝3，mx3＋nx－81 ＝( 27m＋3n )－81＝－91－81＝－172．注：本題采用了一種重要的數(shù)學(xué)思想——“整體思想”．即是考慮問(wèn)題時(shí)不是著眼于他的局部特征，而是把注意力和著眼點(diǎn)放在問(wèn)題的整體結(jié)構(gòu)上，把一些彼此獨(dú)立，但實(shí)質(zhì)上又相互緊密聯(lián)系著的量作為整體來(lái)處理的思想方法．
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)等式的基本性質(zhì)教案1
方法總結(jié)：對(duì)等式進(jìn)行變形，必須在等式的兩邊同時(shí)進(jìn)行，即同加或同減，同乘或同除，不能漏掉一邊，且同加或同減，同乘或同除的數(shù)必須相同.探究點(diǎn)二：利用等式的基本性質(zhì)解方程用等式的性質(zhì)解下列方程：（1）4x＋7＝3； （2）12x－13x＝4.解析：（1）在等式的兩邊都減7，再在等式的兩邊都除以4，可得答案；（2）在等式的兩邊都乘以6，再合并同類項(xiàng)，可得答案.解：（1）方程兩邊都減7，得4x＝－4.方程兩邊都除以4，得x＝－1；（2）方程兩邊都乘以6，得3x－2x＝24，x＝24.方法總結(jié)：解方程時(shí)，一般先將方程變形為ax＝b的形式，然后再變形為x＝c的形式.三、板書(shū)設(shè)計(jì)教學(xué)過(guò)程中，強(qiáng)調(diào)學(xué)生自主探索和合作交流，通過(guò)觀察、操作、歸納等數(shù)學(xué)活動(dòng)，感受數(shù)學(xué)思想的條理性和數(shù)學(xué)結(jié)論的嚴(yán)密性.
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)多邊形和圓的初步認(rèn)識(shí)教案1
方法總結(jié)：在分辨一個(gè)圖形是否為多邊形時(shí)，一定要抓住多邊形定義中的關(guān)鍵詞語(yǔ)，如“線段”“首尾順次連接”“封閉”“平面圖形”等.如此，對(duì)于某些似是而非的圖形，只要根據(jù)定義進(jìn)行對(duì)照和分析，即可判定.探究點(diǎn)二：確定多邊形的對(duì)角線一個(gè)多邊形從一個(gè)頂點(diǎn)最多能引出2015條對(duì)角線，這個(gè)多邊形的邊數(shù)是（）A.2015 B.2016 C.2017 D.2018解析：這個(gè)多邊形的邊數(shù)為2015＋3＝2018.故選D.方法總結(jié)：過(guò)n邊形的一個(gè)頂點(diǎn)可以畫(huà)出（n－3）條對(duì)角線.本題只要逆向求解即可.探究點(diǎn)三：求扇形圓心角將一個(gè)圓分割成三個(gè)扇形，它們的圓心角的度數(shù)之比為2：3：4，求這三個(gè)扇形圓心角的度數(shù).解析：用扇形圓心角所對(duì)應(yīng)的比去乘360°即可求出相應(yīng)扇形圓心角的度數(shù).解：三個(gè)扇形的圓心角度數(shù)分別為：360°×22＋3＋4＝80°；360°×32＋3＋4＝120°；
北師大初中七年級(jí)數(shù)學(xué)上冊(cè)截一個(gè)幾何體教案2
[例3]、用一個(gè)平面去截一個(gè)幾何體，截面形狀有圓、三角形，那么這個(gè)幾何體可能是_________。四、鞏固強(qiáng)化：1、一個(gè)正方體的截面不可能是（ ）A、三角形 B、梯形 C、五邊形 D、七邊形2、用一個(gè)平面去截五棱柱，邊數(shù)最多的截面是_______形．3*、用一個(gè)平面去截幾何體，若截面是三角形，這個(gè)幾何體可能是__________________________________________________．4*、用一個(gè)平面截一個(gè)幾何體，如果截面是圓，你能想象出原來(lái)的幾何體可能是什么嗎？如虹截面是三角形呢？5*、如果用一個(gè)平面截一個(gè)正方體的一個(gè)角，剩下的幾何體有幾個(gè)頂點(diǎn)、幾條棱、幾個(gè)面？6*、幾何體中的圓臺(tái)、棱錐都是課外介紹的，所以我們就在這個(gè)欄目里繼續(xù)為大家介紹這兩種幾何體的截面．（1）圓臺(tái)用平面截圓臺(tái)，截面形狀會(huì)有_____和_______這兩種較特殊圖形，截法如下：