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.
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)表示將來計(jì)劃或行動(dòng). 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(duì)話.
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(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)期到來之際,讓他們?cè)趯W(xué)習(xí)、體育、飲食、特長(zhǎng)、讀書等方面制定計(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,want to be, what,where, when,how引導(dǎo)的特殊疑問句。難點(diǎn)是語言目標(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?這一話題展開思維(1a)、聽力(1b)、口語(1c)訓(xùn)練;
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)語言的過程也是一個(gè)不斷積累的過程,復(fù)習(xí)舊知識(shí),增添新知識(shí).通過小游戲,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)生的綜合語言運(yùn)用能力,運(yùn)用以前學(xué)過的知識(shí)來解決身邊的問題.Period 5 (Section B 3a—3c, selfcheck)教學(xué)內(nèi)容與分析:
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.
內(nèi)容提示1.本單元主要內(nèi)容是學(xué)會(huì)used to結(jié)構(gòu)。Used to +動(dòng)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(huì)陳述自己過去常做的事情。2.學(xué)會(huì)陳述自己過去的愛好等。3.能夠表達(dá)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(dá)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(shí)個(gè)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。
內(nèi)容提示本單元主要內(nèi)容是學(xué)會(huì)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(rèn)識(shí)自己在學(xué)習(xí)方面的長(zhǎng)處和不足。初步了解現(xiàn)在完成時(shí)的結(jié)構(gòu)和用法?,F(xiàn)在完成時(shí)由助動(dòng)詞have/has+動(dòng)詞的過去分詞構(gòu)成,主要表示過去發(fā)生的某一動(dòng)作對(duì)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(huì)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(dòng)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(zhǔn)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。
一、Section A該部分有4個(gè)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(jìn)行聽力( 2a-2b)、口語訓(xùn)練( 2c);第三模塊繼續(xù)圍繞前兩個(gè)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(gè)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(jìn)行“推測(cè)”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(dòng)。三、Self Check該部分有3個(gè)模塊。第一模塊以填空形式對(duì)所學(xué)詞匯進(jìn)行訓(xùn)練;第二模塊就8個(gè)諺語展開閱讀和討論。
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
1 交通工具的比較此活動(dòng)為小組活動(dòng)。學(xué)生通過討論找出到達(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.
教學(xué)重點(diǎn)和難點(diǎn):運(yùn)用所掌握的語言描述,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)立解決問題??傊M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。
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(diǎn)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(diǎn):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(shí)安排5課時(shí)第一課時(shí):Section A: 1a-2c第二課時(shí):Section A : 3a-4第三課時(shí):Section B:1-2c, Self check2第四課時(shí):Section B: 3a-4, Self check1第五課時(shí):Self check ReadingI like music that I can dance to.
1.讓學(xué)生拿出長(zhǎng)方體摸一摸,問:你有什么感覺?摸的的面是什么形狀?師:誰來摸一摸,老師手上長(zhǎng)方體的長(zhǎng)方形在哪?(學(xué)生找出長(zhǎng)方形)2.讓學(xué)生在自己的學(xué)具(長(zhǎng)方體、正方體、圓柱體)上找圖形,并和小組里的同學(xué)說一說。3、指名說,教師把學(xué)生找到的圖形從立體圖形上分離出來,貼于黑板上,師:這些圖形是物體上的一個(gè)面,這就是我們今天要認(rèn)識(shí)的圖形。(板書課題——認(rèn)識(shí)平面圖形)4.讓學(xué)生說說:從什么物體上找到了什么圖形?5.師:你能想辦法把這些形狀畫到一張紙上嗎?請(qǐng)學(xué)生演示各自不同的方法,然后教師在黑板上沿長(zhǎng)方體的一個(gè)面畫出長(zhǎng)方形。師:你會(huì)畫嗎?請(qǐng)小朋友們用自己喜歡的辦法畫出并剪出長(zhǎng)方形、正方形、圓和三角形各2個(gè)。
課堂教學(xué)設(shè)計(jì)說明求比一個(gè)數(shù)少幾的數(shù)的應(yīng)用題是低年級(jí)教學(xué)的一個(gè)難點(diǎn).為了分散難點(diǎn),在復(fù)習(xí)準(zhǔn)備階段做了孕伏.如:圓比三角形多2個(gè),也可以說三角形比圓少2個(gè).為了突破難點(diǎn),讓學(xué)生動(dòng)手?jǐn)[、動(dòng)口說、動(dòng)筆寫,全方位地調(diào)動(dòng)學(xué)生的各種感官參與教學(xué)全過程,使學(xué)生在參與學(xué)習(xí)的活動(dòng)中領(lǐng)悟出“求比一個(gè)數(shù)少幾的數(shù)”的應(yīng)用題仍然是把較大數(shù)看作兩部分組成的,從大數(shù)中去掉大數(shù)比小數(shù)多的部分,就是小數(shù)與大數(shù)同樣多的部分,也就是小數(shù)的數(shù)值.也可以通過“假設(shè)同樣多”去透徹地理解比一個(gè)數(shù)少幾的實(shí)際意義.確實(shí)使學(xué)生理解和掌握了這類應(yīng)用題用減法計(jì)算的道理和解答方法.為了讓學(xué)生進(jìn)一步加深理解和掌握“求比一個(gè)數(shù)少幾的數(shù)”的應(yīng)用題的數(shù)量關(guān)系和解答方法,在鞏固練習(xí)的最后設(shè)計(jì)了一組對(duì)比題目.
l尺子上每相鄰的兩條長(zhǎng)刻度線之間的一大格的長(zhǎng)度都是1厘米。師:我們大家現(xiàn)在一起用手比劃一下,1厘米多長(zhǎng)。互相看一下,計(jì)住了嗎?閉上眼睛想一想,1厘米有多長(zhǎng)。3、認(rèn)識(shí)幾厘米師:我們現(xiàn)在知道1厘米有多長(zhǎng)了,那3厘米又有多長(zhǎng)呢?師:同學(xué)們還能在尺子上找到其他3厘米的長(zhǎng)度嗎?4、用厘米量師:剛才上課時(shí),老師展示的2根線繩,到底哪一根長(zhǎng)一點(diǎn)呢?現(xiàn)在,同學(xué)們先估計(jì)一下這兩根線繩各自多長(zhǎng),然后在測(cè)量比較一下,好嗎?師:結(jié)果是哪根線繩長(zhǎng)一點(diǎn)呢?能說說你是怎么量的嗎?三、知識(shí)拓展1、師:老師這里有一把尺子,可是它斷了一節(jié),沒有刻度“0”,只剩下刻度3到刻度10,那么這把尺子能不能用來量物體的長(zhǎng)度???同學(xué)們能不能幫老師想一想辦法,好嗎?2、其他測(cè)量長(zhǎng)度的工具(課件展示)
教學(xué)目標(biāo):知識(shí)與技能:1、使學(xué)生初步體會(huì)對(duì)策論方法在解決實(shí)際問題中的應(yīng)用。2使學(xué)生認(rèn)識(shí)到解決問題策略的多樣性,形成尋找解決問題最優(yōu)方案的意識(shí)。3、培養(yǎng)學(xué)生的應(yīng)用意識(shí)和解決實(shí)際問題的能力。過程與方法:使學(xué)生理解優(yōu)化的思想,形成從多種方案中尋找最優(yōu)方案的意識(shí),提高學(xué)生解決問題的能力。情感、態(tài)度和價(jià)值觀:使學(xué)生感受到數(shù)學(xué)在日常生活中的廣泛應(yīng)用,嘗試用數(shù)學(xué)的方法解決生活中的簡(jiǎn)單問題。重點(diǎn):體會(huì)優(yōu)化的思想難點(diǎn):尋找解決問題最優(yōu)方案,提高學(xué)生解決問題的能力。教具:圖片教學(xué)過程:一、情境導(dǎo)入:1、你們聽過“田忌賽馬“的故事嗎?田忌是怎樣贏了齊王的?誰能給大家講一講這個(gè)故事?2、問:田忌的馬都不如齊王的馬,但他卻贏了?這是為什么呢?3、這節(jié)課我們就來研究研究。板書課題:數(shù)學(xué)廣角
教學(xué)目標(biāo):1、使學(xué)生在已有的知識(shí)基礎(chǔ)上掌握除數(shù)是兩位數(shù)的除法2、學(xué)生通過解決實(shí)際問題探討口算方法,通過實(shí)踐練習(xí)活動(dòng)熟悉、掌握用整十?dāng)?shù)除的口算方法。3、培養(yǎng)學(xué)生主動(dòng)遷移知識(shí)的思維習(xí)慣。教學(xué)過程:(一)情境引入、教學(xué)新知1、讓學(xué)生看課本插圖,根據(jù)圖中的對(duì)話,完整地編一道應(yīng)用題。生自由發(fā)言:國(guó)慶節(jié)很快就要到了,學(xué)校準(zhǔn)備買一些氣球分給各個(gè)班級(jí)。如果用80個(gè)氣球,要給每班20個(gè),可以分給幾個(gè)班?2、讓學(xué)生口算,并鼓勵(lì)算法多樣化,并讓學(xué)生說說你是怎么想的?80÷20=()個(gè)3、《做一做》練習(xí)90÷30=60÷30=80÷40=4、想一想:83÷20≈()80÷19≈(),這兩道題和例題有什么區(qū)別?聯(lián)系?能否用曾經(jīng)學(xué)過的估算和今天剛學(xué)習(xí)的除法來解決?
教學(xué)建議:億以內(nèi)數(shù)的讀法是在萬以內(nèi)數(shù)的認(rèn)識(shí)基礎(chǔ)上進(jìn)行教學(xué)的,主要是讓學(xué)生用已有的知識(shí)去類推,所以在教學(xué)本課時(shí)我們有必要對(duì)萬以內(nèi)數(shù)的認(rèn)識(shí)進(jìn)行有針對(duì)性的復(fù)習(xí)。如可采用口答形式復(fù)習(xí)數(shù)位順序及各數(shù)位之間的十進(jìn)關(guān)系。對(duì)于萬以內(nèi)數(shù)的讀法,可以出示一組數(shù)據(jù)如:2005年路橋區(qū)前兩個(gè)月共實(shí)現(xiàn)農(nóng)林、漁業(yè)總產(chǎn)值17013萬元,其中農(nóng)業(yè)產(chǎn)品6383萬元,林業(yè)產(chǎn)值94萬元,漁業(yè)產(chǎn)值7560萬元。在對(duì)萬以內(nèi)數(shù)復(fù)習(xí)的基礎(chǔ)上我們?cè)俪鍪镜?頁主題圖,讓學(xué)生讀一讀畫面上呈現(xiàn)的6個(gè)大數(shù),也可以讓學(xué)生說說身邊聽到,看到的大數(shù)。在這環(huán)節(jié)中我們就讓學(xué)生憑著自己的理解運(yùn)用舊知識(shí)去讀數(shù)。這里學(xué)生肯定會(huì)造成認(rèn)知上的沖突,從而引入新課教學(xué)。新課時(shí)可以按以下環(huán)節(jié)進(jìn)行:1、計(jì)數(shù)器操作,認(rèn)識(shí)計(jì)數(shù)單位用計(jì)數(shù)器數(shù)數(shù),撥上一萬,然后一萬一萬地?cái)?shù),一直數(shù)到九萬后,再加一萬是多少?認(rèn)識(shí)十個(gè)一萬是十萬,用同樣的方法,完成一百萬,一千萬,一億的認(rèn)識(shí)。
一、認(rèn)識(shí)射線和直線1.認(rèn)識(shí)線段的特征。(下面的板書填在一個(gè)表里)出示線段(長(zhǎng)4分米)。提問:誰來告訴大家,黑板上的圖形叫什么?(板書:線段)提問:線段要怎樣畫?(按學(xué)生的回答畫線段)。畫線段時(shí),開始和結(jié)束都要注意什么?指出:線段是直的,有兩個(gè)端點(diǎn)。是有限長(zhǎng)的,我們可以用直尺量出線段的長(zhǎng)度。誰能來量一量黑板上的線段,告訴大家,它的長(zhǎng)是多少?,F(xiàn)在看老師再來畫一條5分米長(zhǎng)的線段。2.認(rèn)識(shí)射線。如果把線段的一端無限延長(zhǎng),(老師延長(zhǎng)第二條線段)就得到一條射線。(板書:射線)把射線與線段比一比,它有什么特點(diǎn)?指出:射線也是直的,它只有一個(gè)端點(diǎn)。另一方?jīng)]有端點(diǎn),可以無限地延長(zhǎng)下去,是無限長(zhǎng)的。直尺或三角尺可以畫出射線:先點(diǎn)一點(diǎn),再沿著尺的一邊畫射線。請(qǐng)大家在練習(xí)本上畫一條射線。
教學(xué)難點(diǎn):利用數(shù)的分解組成,正確地計(jì)算5以內(nèi)的減法。教學(xué)準(zhǔn)備:小圓片、小棒、小黑板。教學(xué)過程:一、復(fù)習(xí):1、拍手接力游戲 。2、看圖說圖意,并列式計(jì)算。3、復(fù)習(xí)5以內(nèi)數(shù)的組成。二、新授:1、(小黑板)出示畫圖:樹上有5只鳥,飛走了一只。根據(jù)這幅圖,你能提什么問題呢?2、那么你怎么列式呢?先和小組里的小朋友說一說,再指名回答,請(qǐng)學(xué)生上來板書列式。3、小組內(nèi)交流:“5-1”得幾?你是怎么算的?和組里的小朋友交流,每個(gè)小朋友都說自己的想法,是怎樣得出結(jié)果的。4、匯報(bào)情況:指名小老師上來教大家計(jì)算的過程(提倡算法多樣化,教師可以有意識(shí)請(qǐng)想法不同的學(xué)生上來說一說)5、抽象出計(jì)算過程:引導(dǎo)學(xué)生如果不看圖,不數(shù)手指,你會(huì)計(jì)算“5-1”得幾嗎?(引導(dǎo)學(xué)生用數(shù)的組成知識(shí)來計(jì)算)