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人教版新目標(biāo)初中英語八年級上冊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，……這是英語中表達做某事的步驟的一種說法。如果步驟較多，還可以說：first-next-after that-later on-finally/at last通常你會聽到說英語國家的人在說 first, next, then, finally 和后面的內(nèi)容時，他們會做一些停頓。這樣就能提前告訴聽者接下來講的是一系列的步驟。這一點在朗讀和聽力中應(yīng)特別注意。2. how many, how much均為疑問詞，同是“多少”，但用法不同。請看：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，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，謂語動詞用單數(shù)。how many與how much的區(qū)別可簡記為：前how many：問“多少”，復(fù)數(shù)名詞后面跑；how much問“多少”，不可數(shù)名詞單數(shù)好。前者答語用基數(shù)詞，后者答語用數(shù)量關(guān)系。
人教版新目標(biāo)初中英語八年級上冊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)初中英語八年級上冊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)準備 學(xué)生預(yù)習(xí)本單元所有的詞匯多媒體課件 活動表 獎品四、 教學(xué)過程Pre-task1. Warming upEnjoy ourselves. Watch cartoon Cinderella. 看動畫片段《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)初中英語八年級上冊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. 運送；運輸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.
人教版新目標(biāo)初中英語八年級上冊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)在進行時表示將來計劃或行動. 4. 特殊疑問句（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)對話.
人教版新目標(biāo)初中英語八年級上冊I’m going to be a basketball player教案3篇
教學(xué)目標(biāo)1.知識目標(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)會用英語描述有關(guān)職業(yè)的表達法。2.能力目標(biāo)：（1）能夠談?wù)摓閷崿F(xiàn)理想所做出的打算和安排。（2）能夠談?wù)撐磥碜约号c他人理想的職業(yè)及原因。（3）能用英語描述課余時間的活動安排，最終具備表達綜合信息的能力。3.情感目標(biāo)：新學(xué)期到來之際，讓他們在學(xué)習(xí)、體育、飲食、特長、讀書等方面制定計劃，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、難點本單元的重點為“be going to”表將來,want to be, what,where, when,how引導(dǎo)的特殊疑問句。難點是語言目標(biāo)的實現(xiàn)。教材分析本單元以I am going to be a basketball player為話題，共設(shè)計了三部分的內(nèi)容：一、Section A該部分有4個模塊。第一模塊圍繞Do you think these jobs are interesting?這一話題展開思維（1a）、聽力（1b）、口語（1c）訓(xùn)練；
人教版新目標(biāo)初中英語八年級上冊I’m more outgoing than my sister教案2篇
1 交通工具的比較此活動為小組活動。學(xué)生通過討論找出到達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活動，談?wù)摫窘M所選擇的交通工具。（2）各組選代表向全班匯報，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 哪個城市更合適？此活動具有挑戰(zhàn)性。假設(shè)中國要舉行2014年世界杯足球賽，分別從歷史，人文，天氣等方面對各城市（北京，大連，上海，昆明）進行比較，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)初中英語八年級上冊What’s the best radio station教案2篇
教學(xué)重點和難點：運用所掌握的語言描述，比較不同地點的特點。在練習(xí)中學(xué)習(xí)掌握英語比較級和最高級的用法。課前準備分配小組,每組五至六人。通過上網(wǎng)或翻閱報刊雜志等方法，確定旅游線路，做出基本的旅游計劃。教學(xué)設(shè)計：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，主動獲取知識，養(yǎng)成良好的學(xué)習(xí)方法。逐步學(xué)會獨立解決問題?？傊M可能調(diào)動學(xué)生的非智力因素促進智力因素的發(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)動學(xué)生的學(xué)習(xí)積極性，使學(xué)生變被動學(xué)習(xí)為主動學(xué)習(xí)。通過電腦形象的演示，加強印象，提高興趣，突破難點，提高教學(xué)效率，進而增大教學(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)初中英語八年級上冊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,同時也可以讓他們復(fù)習(xí)一部分的表示人體部位的單詞,擴充知識.學(xué)習(xí)語言的過程也是一個不斷積累的過程,復(fù)習(xí)舊知識,增添新知識.通過小游戲,強化學(xué)生對Does she/he have…這個句子的運用能力.通過復(fù)習(xí)，自然的引到下面新知識的學(xué)習(xí)。充分利用表格,由句子到對話,再到文章,讓學(xué)生循序漸進. 提高學(xué)生的綜合語言運用能力,運用以前學(xué)過的知識來解決身邊的問題.Period 5 (Section B 3a—3c, selfcheck)教學(xué)內(nèi)容與分析:
人教版新目標(biāo)初中英語九年級上冊Teenagers should be allowed to choose their own clothes教案2篇
Step 1 Greeting Greet the class and check the homeworkStep 2 A duty report The S on duty gives a report on the rules in his home and lead in 3a “Sun Fei’s and Wu Yu’s rules” Step 3 ReadingSs read the conversation and write the two girls’ rules in the chart. Check the answers.Get Ss to read after the tape and then read aloud by themselves. Then, T explains the language points.Step 4 Pairwork 3bRole play. Use the information in chart to practice with the conversation in 3a covered. They can look at the sample conversation in the right box.Step 5 Task 2 “Who’s the best reporter?”Make a survey by asking any 5 students the questions in the chart in activity 4. Then give out a report about it. See who is the best reporter? And the best reporter will get a nice ball-pen.Step 6 Summary and homework:Write out the report in your exercise-books.Period ThreeStep 1 Greeting and a duty reportThe S gives a duty report talking about his experience of being late for school. Lead in the question “Do you ever get to school late? How often do you get to school late? Always, usually, sometimes, or never?Step 2 1a Get Ss to finish writing.Step 3 Pairwork 1b Get Ss to talk about their answers with their partners using the sample conversation in the box on the right.Step 4 Listening practice2a Lead-in: What will happen if you get to school late? What about Peter? Let’s listen to a conversation between Peter and his father. Get Ss to finish 2a (As usual, for the first time, Ss only listen.) Check the answers.
人教版新目標(biāo)初中英語九年級上冊I like music that I can dance to教案
教學(xué)目標(biāo): 1. Express preferences2. Talk about one’s likes and dislikes and the reasons3. Learn to express one’s opinions 4. Learn to write a reply 語言功能： 1) Talk about one’s preferences, using t he relative clause2) Talk about people’s likes and dislikes and the reasons3) Talk about opinions語言結(jié)構(gòu)： Relative clauses with that and who語言目標(biāo)：What kind of music do you like?I like music that I can sing along with.I love singers who write their own music.We prefer music that has great lyric.重點詞匯及短語：heart, photography, interest, class, whatever, miss, okay, expect, sweet, taste, itself, laboratory, cancer, increase, biscuit, main, care， prefer… to…, remind somebody of …, dance to, sing along with, be sure to, interest somebody, make somebody adj., to be honest, suit somebody, on display, catch up教學(xué)重難點：What do other people think of the different kinds of things? How to express one’s opinions? 學(xué)習(xí)方式：討論，合作學(xué)習(xí)情感目標(biāo)：通過本單元的學(xué)習(xí)，能提高學(xué)生的藝術(shù)鑒賞能力和審美情趣，并引導(dǎo)學(xué)生養(yǎng)成健康的飲食習(xí)慣。課時安排5課時第一課時：Section A: 1a-2c第二課時：Section A : 3a-4第三課時：Section B:1-2c, Self check2第四課時：Section B: 3a-4, Self check1第五課時：Self check ReadingI like music that I can dance to.
人教版新目標(biāo)初中英語九年級上冊I used to be afraid of the dark教案
內(nèi)容提示1．本單元主要內(nèi)容是學(xué)會used to結(jié)構(gòu)。Used to +動詞原形表示過去經(jīng)常、以前常常，只用于過去式中，用來表示現(xiàn)在已不存在的習(xí)慣或狀態(tài)。例如：They used to play football together．他們過去常在一起蹋足球。（現(xiàn)在不在一起踢了)2．used to的疑問形式和否定形式為Did you use to…?和I didn’t use to… 也可以用Used you to…?和I used not to…但現(xiàn)在多使用前者。例如：Did you used to swim in the river? 你過去常在河里游泳嗎?I didn’t use to play the piano． 我以前并不經(jīng)常彈鋼琴。教學(xué)目標(biāo)一、學(xué)習(xí)目標(biāo)（Language Goal） 1．學(xué)會陳述自己過去常做的事情。2．學(xué)會陳述自己過去的愛好等。3．能夠表達自己現(xiàn)在和過去在外表、性格、娛樂等方面的變化。4．能夠表達朋友、家人等現(xiàn)在和過去的變化。二、語言結(jié)構(gòu)（Language Structures） 1．I used to be short when I was young. 我年輕時個子很矮。 2． —Did you use to have straight hair? 你過去是直發(fā)嗎？—Yes, I did. 是的。 3． —Did you use to play the piano? 你過去彈鋼琴嗎？—No, I didn’t. 不，我不彈。 4．I used to be afraid of dark. 我過去害怕黑暗。 5．I’m terrified of the snakes. 我害怕蛇。
人教版新目標(biāo)初中英語九年級上冊How do you study for a test教案2篇
內(nèi)容提示本單元主要內(nèi)容是學(xué)會利用verb十by／with gerund表示方式方法來討論學(xué)習(xí)英語的策略，認識自己在學(xué)習(xí)方面的長處和不足。初步了解現(xiàn)在完成時的結(jié)構(gòu)和用法?，F(xiàn)在完成時由助動詞have／has+動詞的過去分詞構(gòu)成，主要表示過去發(fā)生的某一動作對現(xiàn)在仍有影響或造成的后果，常與already，yet，just，ever，never等副詞連用。教學(xué)目標(biāo)一、學(xué)習(xí)目標(biāo)（Language Goal） 1. Talk about how to study . 學(xué)會討論各種學(xué)習(xí)方法和策略。2. Find out your suitable learning methods. 找出適合自己的學(xué)習(xí)方法。 二、語言結(jié)構(gòu)（Language Structures） 1. Verb + by with gerund by＋動名詞短語 表示“通過…途徑，方法” 2. How questions have引導(dǎo)的特殊疑問句 三、目標(biāo)語言（Target Language） 1. How do you study for tests ? 你是怎樣準備考試的？Well , I study by working with my classmates. 哦，我和同學(xué)們一起學(xué)習(xí)。2. Have you ever studied with a group ? 你曾經(jīng)參加過學(xué)習(xí)小組嗎？Yes , I have . I’ve learned a lot that way . 是的，參加過。通過這種方式我學(xué)了許多。
人教版新目標(biāo)初中英語九年級上冊It must belong to Carla教案
一、Section A該部分有4個模塊。第一模塊圍繞Whose volleyball is this? 這一話題展開思維（ 1a）、聽力（1b）、口語（ 1c）訓(xùn)練；第二模塊圍繞上一模塊中的話題進行聽力（ 2a-2b）、口語訓(xùn)練（ 2c）；第三模塊繼續(xù)圍繞前兩個模塊中的“making inferences”展開訓(xùn)練。訓(xùn)練形式為閱讀排序（ 3a）和兩人問答（3b）；第四模塊仍就上一話題展開討論。二、Section B該部分有4個模塊。第一模塊要求根據(jù)圖畫和所提供的單詞寫出合理的句子；第二模塊在聽力（ 2a-2b）和分角色口語訓(xùn)練（ 2c）的基礎(chǔ)上，繼續(xù)進行“推測”訓(xùn)練; 第三模塊圍繞“Strange events in Bell Tower neighborhood”這一話題展開閱讀（ 3a）和寫作（3b -3c）訓(xùn)練；第四模塊以dream為話題展開小組活動。三、Self Check該部分有3個模塊。第一模塊以填空形式對所學(xué)詞匯進行訓(xùn)練；第二模塊就8個諺語展開閱讀和討論。
人教版新目標(biāo)初中英語九年級上冊Where would you like to visit教案2篇
The First PeriodⅠ．Teaching Aims and DemandsKnowledge Objects（1） Key Vocabularytiring, educational, fascinating, thrilling, peaceful, exotic, trek, jungle, take it easy, explore, historic, site（2） Target LanguageWhere would you like to go on vacation?I’d like to trek through the jungle, because I like exciting vacations．2． Ability Objects（1）Train students to talk about places they would like to visit with the target language．（2）Train students to describe vacations with different adjectives．（3）Train students' listening skill．3． Moral Object,It′s more interesting to go on vacating somewhere instead of staying at home．Ⅱ． Teaching Key Points1． Key Vocabularytiring, educational, fascinating, thrilling, peaceful, exotic, trek, jungle, take it easy, explore, historic, site2． Target LanguageTalk about different places with the target language．Ⅲ． Teaching Difficult Points1． Describe vacations with different adjectives．2． Talk about different places with the target language．Ⅳ． Teaching Methods1． Teaching by illumination2． Teaching by doing chain drills3． Teaching by pairworkⅤ． Teaching Aids1． A tape recorder2． Some pictures of different places with famous views
人教版新目標(biāo)初中英語七年級上冊Can you play the guitar教案
本單元主要是學(xué)習(xí)情態(tài)動詞can的肯定句、否定句、一般疑問句，肯定與否定回答，以及特殊疑問句的構(gòu)成和用法；復(fù)習(xí)what弓！導(dǎo)的特殊疑問句。本單元主要圍繞“加人俱樂部，談?wù)撟约旱哪芰Α边@一話題，設(shè)計了三個任務(wù)型活動：任務(wù)一是：自己的才藝表演，學(xué)習(xí)情態(tài)動詞can的用法；任務(wù)二是：自己建立俱樂部，運用情態(tài)動詞can談?wù)撟约涸谀骋环矫娴哪芰Α⑾埠煤鸵庠?；任?wù)三是：我能成功，主要是復(fù)習(xí)鞏固談?wù)摳髯缘膼酆煤吞亻L的方法。單元知識系統(tǒng)（樹）Can you/he/she/you dance? 一Yes，I/he/she/we can．／No，I/he/she/we can’t．Can Bill play the guitar?一Yes，he can，but he can’t sing．單元總體目標(biāo)通過學(xué)習(xí)情態(tài)動詞can的用法，使學(xué)生能夠表達自己在某一方面所具備的才能；能夠談?wù)撟约旱南埠门c意愿；能夠為自己成立的各種俱樂部制作海報；會寫招聘廣告。單元重難點一覽重點 難點I．復(fù)習(xí)詞匯：can，play，want2.詞匯：guitar, dance, swim，sing, chess, speak, drum，trumpet，violin，play the guitar3．句型：Can you/he/she/you dance?Yes，I/he/she/we can．／No，I/he/she/we can’t．Can Bill play the guitar?
【高教版】中職數(shù)學(xué)基礎(chǔ)模塊上冊：2.3《一元二次不等式》教案設(shè)計
教師姓名 課程名稱數(shù)學(xué)班 級 授課日期 授課順序 章節(jié)名稱§2.3 一元二次不等式教 學(xué) 目 標(biāo)知識目標(biāo)：1、理解一元二次不等式和一元二次方程以及二次函數(shù)之間的關(guān)系 2、理解一元二次不等式的解集的含義 3、一元二次不等式的解集與二次函數(shù)圖像的對應(yīng) 技能目標(biāo)：1、會解一元二次方程 2、會畫二次函數(shù)的圖像 3、能結(jié)合圖像寫出一元二次不等式的解集 情感目標(biāo)：體會知識之間的相互關(guān)聯(lián)性，體會數(shù)形結(jié)合思想的重要性教學(xué) 重點 和 難點重點： 1、一元二次不等式的解集的含義 2、一元二次不等式與二次函數(shù)的關(guān)系 難點： 1、將一元二次不等式和一元二次方程以及二次函數(shù)聯(lián)系起來 2、在函數(shù)圖像上正確的找到解集對應(yīng)的部分教 學(xué) 資 源《數(shù)學(xué)》（第一冊） 多媒體課件評 估 反 饋課堂提問 課堂練習(xí)作 業(yè)習(xí)題2.3課后記本節(jié)課內(nèi)容是比較重要的，是一元二次方程、一元二次函數(shù)、一元二次不等式的結(jié)合，相關(guān)知識點融會貫通，數(shù)形結(jié)合的思想方法在這有很好的運用。三種情況只要講清楚一種，另外兩種可由學(xué)生自行推出結(jié)論。
【高教版】中職數(shù)學(xué)基礎(chǔ)模塊上冊：2.3《一元二次不等式》優(yōu)秀教案
【教學(xué)目標(biāo)】1、了解方程、不等式、函數(shù)的圖像之間的聯(lián)系；2、掌握一元二次不等式的圖像解法；【教學(xué)重點】1、 方程、不等式、函數(shù)的圖像之間的聯(lián)系；2、 一元二次不等式的解法?！窘虒W(xué)難點】 一元二次不等式的解法?！窘虒W(xué)設(shè)計】 1、從復(fù)習(xí)一次函數(shù)圖像、一元一次方程、一元一次不等式的聯(lián)系入手；2、類比觀察一元二次函數(shù)圖像，得到一元二次不等式的圖像解法；3、加強知識的鞏固與練習(xí)，培養(yǎng)學(xué)生的數(shù)學(xué)思維能力?！菊n時安排】 2課時（90分鐘）【教學(xué)過程】一、一元二次不等式的解法² 復(fù)習(xí)回顧1、根據(jù)初中所學(xué)知識，填寫下面表格： △＞0 △=0△＜0y=ax²+bx+c (a＞0)的圖像ax²+bx+c=0 (a＞0)的根有 2 個根有 1 個根有 0 個根2、觀察二次函數(shù)y=x²-5x+6的圖像，回答下列問題：（1）當(dāng)y=0時，x取什么值？（2）二次函數(shù)y=x²-5x+6的圖像與x軸交點的坐標(biāo)是什么？（3）當(dāng)y＜0時，x的取值范圍是什么？總結(jié)：由此看到，通過對函數(shù)y=x²-5x+6的圖像的研究，可以求出不等式x²-5x+6＞0與x²-5x+6＜0的解集
北師大初中數(shù)學(xué)八年級上冊平均數(shù)1教案
解析：本題是要求兩個未知數(shù)，即3和4的權(quán)．所以應(yīng)把平均數(shù)與方程組綜合起來，利用平均數(shù)的定義來列方程，組成方程組求解．解：設(shè)投進3個球的有x人，投進4個球的有y人，由題意，得3x＋4y＋5×2＝3.5×（x＋y＋2），0×1＋1×2＋2×7＋3x＋4y＝2.5×（1＋2＋7＋x＋y）.整理，得x－y＝6，x＋3y＝18.解得x＝9，y＝3.答：投進3個球的有9人，投進4個球的有3人．方法總結(jié)：利用平均數(shù)的公式解題時，要弄清數(shù)據(jù)及相應(yīng)的權(quán)，避免出錯．三、板書設(shè)計平均數(shù)算術(shù)平均數(shù)：x＝1n（x1＋x2＋…＋xn）加權(quán)平均數(shù)：x＝（x1f1＋x2f2＋…＋xnfn）f1＋f2＋…fn通過探索算術(shù)平均數(shù)和加權(quán)平均數(shù)的聯(lián)系與區(qū)別，培養(yǎng)學(xué)生的思維能力；通過有關(guān)平均數(shù)問題的解決，提升學(xué)生的數(shù)學(xué)應(yīng)用能力．通過解決實際問題，體會數(shù)學(xué)與社會生活的密切聯(lián)系，了解數(shù)學(xué)的價值，增進學(xué)生對數(shù)學(xué)的理解和增加學(xué)好數(shù)學(xué)的信心．
北師大初中數(shù)學(xué)八年級上冊算術(shù)平方根2教案
1．細講概念、強化訓(xùn)練要想讓學(xué)生正確、牢固地樹立起算術(shù)平方根的概念，需要由淺入深、不斷深化的過程．概念是由具體到抽象、由特殊到一般，經(jīng)過分析、綜合去掉非本質(zhì)特征，保持本質(zhì)屬性而形成的．概念的形成過程也是思維過程，加強概念形成過程的教學(xué)，對提高學(xué)生的思維水平是很有必要的．概念教學(xué)過程中要做到：講清概念，加強訓(xùn)練，逐步深化．“講清概念”就是通過具體實例揭露算術(shù)平方根的本質(zhì)特征．算術(shù)平方根的本質(zhì)特征就是定義中指出的：“如果一個正數(shù) 的平方等于 ，即 ，那么這個正數(shù) 就叫做 的算術(shù)平方根，”的“正數(shù) ”，即被開方數(shù)是正的，由平方的意義， 也是正數(shù)，因此算術(shù)平方根也必須是正的．當(dāng)然零的算術(shù)平方根是零.