
5. Read to get detailed information about Paragraph 5.Q1. What shows the revival of Tangshan?Q2. How can Tangshan revive itself and get up on its feet again?Q3. In times of disasters, how can we go through it?T: In times of disasters, we should unify, show the wisdom and stay positive.Step 4 Activity 4 Highlighting the theme and reflecting1. Make a summary of the text.2. Further understand the titleQ: After our learning, why do you think the earth didn’t sleep on that night?T: An earthquake happened. The people in the earthquake suffered a lot, and the people outside Tangshan were concerned about the people there a lot.3. Reflect through discussion on what can be learnt after reading.T: Disasters are powerful. Unpreparedness can be deadly. Life is weak, but if people work together to help each other, disasters can be defeated.There is no love from disaster, but we have love in the human heart.Step 5 Assignment How does the writer convey that the earthquake was deadly, and that people were helpless during the earthquake? Try to find some attractive and impressive expressions and note them down.

常跟雙賓語(yǔ)的動(dòng)詞有:(需借助to的)bring, ask, hand, offer, give, lend, send, show, teach, tell, write, pass, pay, promise, return等;基本句型 五S +V + O + OC(主+謂+賓+賓補(bǔ))特點(diǎn):動(dòng)詞雖然是及物動(dòng)詞,但是只跟一個(gè)賓語(yǔ)還不能表達(dá)完整的意思,必須加上一個(gè)補(bǔ)充成分來(lái)補(bǔ)足賓語(yǔ),才能使意思完整。 判斷原則:能表達(dá)成—賓語(yǔ) 是…/做…注:此結(jié)構(gòu)由“主語(yǔ)+及物的謂語(yǔ)動(dòng)詞+賓語(yǔ)+賓語(yǔ)補(bǔ)足語(yǔ)”構(gòu)成。賓語(yǔ)與賓語(yǔ)補(bǔ)足語(yǔ)之間有邏輯上的主謂關(guān)系或主表關(guān)系,若無(wú)賓語(yǔ)補(bǔ)足語(yǔ),則句意不夠完整??梢杂米鲑e補(bǔ)的有:名詞,形容詞,副詞,介詞短語(yǔ),動(dòng)詞不定式,分詞等。如:He considers himself an expert on the subject.他認(rèn)為自己是這門學(xué)科的專家。We must keep our classroom clean.我們必須保持教室清潔。I had my bike stolen.我的自行車被偷了。We invited him to come to our school.我們邀請(qǐng)他來(lái)我們學(xué)校。I beg you to keep secret what we talked here.我求你對(duì)這里所談的話保密。用it做形式賓語(yǔ),而將真正的賓語(yǔ)放到賓語(yǔ)補(bǔ)足語(yǔ)的后面,以使句子結(jié)構(gòu)平衡,是英語(yǔ)常用的句型結(jié)構(gòu)方式。即:主語(yǔ)+謂語(yǔ)+it+賓補(bǔ)+真正賓語(yǔ)。如:We think it a good idea to go climb the mountain this Sunday.

【教材分析】本節(jié)課是高中英語(yǔ)第一冊(cè)的最后一個(gè)單元的閱讀和思考部分,文章難度明顯增加,體現(xiàn)在以下幾個(gè)方面:文章題材是說(shuō)明文,比較難理解;話題生疏,涉及到歷史等知識(shí);生詞量增大,而且在語(yǔ)境中理解詞匯的要求提高。面對(duì)這些,教師的難度和高度也要有所提升,通過(guò)探討說(shuō)明順序,了解背景知識(shí)等幫助他們找到說(shuō)明文閱讀的方法?!窘虒W(xué)目標(biāo)與核心素養(yǎng)】1. 文化意識(shí)目標(biāo)新課程中指出,文化意識(shí)是對(duì)中外文化的理解和對(duì)優(yōu)秀文化的認(rèn)同。文化意識(shí)的的培養(yǎng)有助于學(xué)生增加國(guó)家認(rèn)同和家國(guó)情懷,成為有文明素養(yǎng)和社會(huì)責(zé)任感的人。我們這個(gè)單元很好體現(xiàn)了這一點(diǎn),通過(guò)了解漢字書寫的體系和發(fā)展,學(xué)生可以有一種文化自豪感,同時(shí)也能夠幫助學(xué)生深入挖掘這篇文章,從而想到更多和中國(guó)文化相關(guān)的方面。2. 學(xué)習(xí)能力目標(biāo)

Step 3: Read to sum upRead it again and sum up the problems of the three students, and then write down the advice that was given from others.Step 4: Work in pairs. List your learning problems in English and brainstorm some useful advice.Useful expressions ? I don't know how to…... Is a big difficulty for me. I cannot ...? You might try …. It's very important to…? I have no idea how/what .My biggest problem is .... ? I (also) have trouble with. My advice is …. This worked for me.? l cannot understand the teachers’ English in class.Step 5 Homework:為提高我校學(xué)生的英語(yǔ)口語(yǔ)水平,我們將舉辦英語(yǔ)演講比賽(English- speaking contest),請(qǐng)你根據(jù)下面的信息,以學(xué)生會(huì)(the Students‘ Union)的名義寫一份海報(bào),歡迎全校同學(xué)參加,屆時(shí)特邀本校美籍教師史密斯先生頒獎(jiǎng)。? 報(bào)名時(shí)間 9月30日以前(報(bào)名:signup)? 報(bào)名地點(diǎn) 學(xué)生會(huì)辦公室? 比賽時(shí)間 10月9日晚7:00~9:00? 比賽地點(diǎn) 學(xué)校大會(huì)議室? 獎(jiǎng)勵(lì) 前8名

Step 2 New WordsUse ppt to show some words from the passage.Tell the students to remember the meanings.Step3 Skimming and Thinking1. Skim the text and decide which order Han Jing follows to talk about her first day. Time order or place order?Time order2. What is Han Jing worried about before she goes to senior high school?She is worried about whether she will make new friends and if no one talks to her, what she should do.Step 4 Fast Reading1. Match the main ideas with each paragraphParagraph 1:The worries about the new school day Paragraph 2Han Jing’s first maths classParagraph 3Han Jing’s first chemistry classParagraph 4Han Jing’s feelings about her first senior school dayStep 5 Careful Reading1. Fill in the chart with the words and phrases about Han Jing’s day. Answers: Senior high school, a little nervous; Her first maths class, classmates and teachers, friendly and helpful; Chemistry lab; new; great; annoying guy; Confident; a lot to explore2. Read the text again and discuss the questions.1) Why did Han Jing feel anxious before school?Because she was a new senior high student and she was not outgoing. What was more, she was worried about whether she can make friends.2) How was her first maths class?It was difficult but the teacher was kind and friendly. 3) What happened in the chemistry class? What would you do if this happened to you? A guy next to Han Jing tried to talk with her and she couldn’t concentrate on the experiment.

教學(xué)目標(biāo)知識(shí)目標(biāo):讓學(xué)生更好理解如何恰當(dāng)?shù)貙懸粋€(gè)人的信息介紹,并能讓學(xué)生熟練地使用一些寫作技能。能力目標(biāo):培養(yǎng)學(xué)生的寫作能力和團(tuán)隊(duì)協(xié)作能力。情感目標(biāo):提升學(xué)生對(duì)寫作的興趣。教學(xué)重難點(diǎn) 教學(xué)重點(diǎn):如何能讓學(xué)生更好地理解個(gè)人信息介紹。教學(xué)難點(diǎn):如何能讓學(xué)生通過(guò)適當(dāng)?shù)厥褂靡恍懽骷寄軄?lái)寫一篇較好的個(gè)人信息介紹。教學(xué)準(zhǔn)備 多媒體、黑板、粉筆一、Pre-class1. Greetings2. Leading-inAsk students how to write a profile. What kinds of aspects should be included? The teacher asks students to discuss the topic with each other and put forward to much more ideas about the answer.二、While-class1. The teacher lets students to read the student profiles on Page 8 silently and then asks students to discuss the questions below.1. What is Ann like? How do you know?2. What are Thando’s hobbies?3. Where does Thando come from?4. What is Thando’s dream?5. What does “You will never see me without a book or a pen” mean?

【教學(xué)過(guò)程】導(dǎo)入:如果說(shuō)唐詩(shī)是中國(guó)文學(xué)史中的一朵奇葩,那孟浩然則是點(diǎn)綴其上的一滴晶瑩露珠,其充滿魅力與特色的詩(shī)風(fēng)在盛唐獨(dú)樹一幟,也為其在人才濟(jì)濟(jì)的詩(shī)史上刻下了永恒的印記。同學(xué)們能否先回憶一下,我們學(xué)過(guò)的孟浩然的詩(shī)歌有哪些?(《春曉》、《宿建德江》、《望洞庭湖贈(zèng)張丞相》、《過(guò)故人莊》。)我們常說(shuō)"中國(guó)古詩(shī)寫胸襟,是人格美的自然流露",那么孟詩(shī)在語(yǔ)言和思想情感上留給你怎樣的印象和感受?整體感知:本文作者聞一多先生也是一位詩(shī)人,所謂"英雄惜英雄",相同的志向與情趣使聞一多似乎帶著我們?cè)谂c孟浩然進(jìn)行了一場(chǎng)心靈的對(duì)話。那么同學(xué)們?cè)诳焖匍喿x文章之后,能否先找出作者是選擇了一個(gè)怎樣的角度對(duì)孟浩然評(píng)價(jià)的?(詩(shī)如其人,人如其詩(shī)。)

六、到此為止,我們了解到,作者對(duì)“笑”鯤鵬和別人的蜩與學(xué)鳩、斥鴳、宋榮子都一一作了否定。那么請(qǐng)大家討論一下,1、作者對(duì)鯤鵬和“知效一官,行比一鄉(xiāng),德合一君,而征一國(guó)者”是不是肯定呢?明確:也都作了否定。否定后者好理解,關(guān)鍵是否定前者不好理解,因?yàn)椤蚌H鵬展翅”早已作為積極的意象被人們廣泛引用。但在本文中,作者在講述這一寓言故事時(shí),突出的不是鯤鵬本身,而是風(fēng)力,“故九萬(wàn)里,風(fēng)斯在下矣,而后乃今培風(fēng);背負(fù)青天,而莫之夭閼者,而后乃今將圖南”。對(duì)風(fēng)力作用的突出,實(shí)際上就是對(duì)鯤鵬的否定。作者寫了“笑”的雙方,對(duì)“笑”的一方蜩與學(xué)鳩、斥鴳、宋榮子都作了否定,對(duì)被“笑”的一方鯤鵬和“知效一官,行比一鄉(xiāng),德合一君,而征一國(guó)者”也都作了否定,并且對(duì)順便提及的野馬、塵埃、芥、大舟、朝菌、蟪蛄、冥靈、大椿、彭祖、列子等事物或者人物也都作了否定。這種全盤否定的態(tài)度,如果我們借用本文中的一個(gè)形象的詞語(yǔ),可以說(shuō)是:笑!是的,本文也可以說(shuō)是:莊子“笑”萬(wàn)物!

【教材分析】The topic of this unit is about teenage life, which belongs to the theme context of “humans and oneself”.As teenagers who shoulder the responsibility of “Chinese great dream”, they must fully know themselves, including their strengths, weaknesses and challenges etc. They are supposed to improve themselves continuously and readily study their subjects, and thus foster their strategies and confidence in lifelong studies.This period is entitled the freshmen challenges, which mainly concerns some big challenges for new students in Senior high school. In this period, a teacher should lead students to find out what their challenges are and guide them to figure out how to crack the challenges and better themselves. More importantly, a teacher should instruct students to absorb new language points and appreciate the language. Besides, a teacher must instruct students to acquire some skills concerning reading efficiently and inspire them to talk more about their new school life, especially their new problems and solutions both at school and in life.【教學(xué)目標(biāo)與核心素養(yǎng)】1. Enable students to acquire the basic usage of the new words and expressions concerning the freshmen challenges and learn to use them flexibly.2. Enable students to have a good understanding of the freshmen challenges in the new senior high school which is quite different from junior middle school.3. Develop students’ sense of cooperative learning and individual thinking capability. 4. Develop students’ different learning skills to solve different reading comprehensive problems.

求證:直角三角形的兩個(gè)銳角互余.解析:分析這個(gè)命題的條件和結(jié)論,根據(jù)已知條件和結(jié)論畫出圖形,寫出已知、求證,并寫出證明過(guò)程.已知:如圖所示,在△ABC中,∠C=90°.求證:∠A與∠B互余.證明:∵∠A+∠B+∠C=180°(三角形內(nèi)角和等于180°),又∠C=90°,∴∠A+∠B=180°-∠C=90°.∴∠A與∠B互余.方法總結(jié):解此類題首先根據(jù)題意將文字語(yǔ)言變成符號(hào)語(yǔ)言,畫出圖形,最后再經(jīng)過(guò)分析論證,并寫出證明的過(guò)程.三、板書設(shè)計(jì)命題分類公理:公認(rèn)的真命題定理:經(jīng)過(guò)證明的真命題證明:推理的過(guò)程經(jīng)歷實(shí)際情境,初步體會(huì)公理化思想和方法,了解本教材所采用的公理,讓學(xué)生對(duì)真假命題有一個(gè)清楚的認(rèn)識(shí),從而進(jìn)一步了解定理、公理的概念.培養(yǎng)學(xué)生的語(yǔ)言表達(dá)能力.

② 命題的含義:判斷一件事情的句子,叫做命題,如果一個(gè)句子沒有對(duì)某一件事情作出任何判斷,那么它就不是命題.活動(dòng)目的:通過(guò)課后的總結(jié),使學(xué)生對(duì)定義、命題等概念有更清楚的認(rèn)識(shí),讓學(xué)生在頭腦中對(duì)本節(jié)課進(jìn)行系統(tǒng)的歸納與整理.教學(xué)效果:學(xué)生在有了前面對(duì)定義、特別是命題概念的學(xué)習(xí)后,能了解命題的結(jié)構(gòu),以及哪些是命題,使學(xué)生對(duì)命題的學(xué)習(xí)有了清楚的認(rèn)識(shí)。第五環(huán)節(jié) 課后練習(xí)學(xué)習(xí)小組搜集八年級(jí)數(shù)學(xué)課本中的新學(xué)的部分定義、命題,看誰(shuí)找得多.四、教學(xué)反思本節(jié)課的設(shè)計(jì)具有如下特點(diǎn):(1)采用了“小品表演”的形式引入新課,意在激起學(xué)生對(duì)數(shù)學(xué)的興趣,讓學(xué)生知道,數(shù)學(xué)不是枯燥無(wú)味的。并能從表演中不同的人對(duì)“黑客”這個(gè)名詞的不同理解更好地悟出“定義”的含義。

教學(xué)目標(biāo):1、理解并掌握正切的含義,會(huì)在直角三角形中求出某個(gè)銳角的正切值。2、了解計(jì)算一個(gè)銳角的正切值的方法。教學(xué)重點(diǎn):理解并掌握正切的含義,會(huì)在直角三角形中求出某個(gè)銳角的正切值。教學(xué)難點(diǎn):計(jì)算一個(gè)銳角的正切值的方法。教學(xué)過(guò)程:一、觀察回答:如圖某體育館,為了方便不同需求的觀眾設(shè)計(jì)了多種形式的臺(tái)階。下列圖中的兩個(gè)臺(tái)階哪個(gè)更陡?你是怎么判斷的?圖(1) 圖(2)[點(diǎn)撥]可將這兩個(gè)臺(tái)階抽象地看成兩個(gè)三角形答:圖 的臺(tái)階更陡,理由 二、探索活動(dòng)1、思考與探索一:除了用臺(tái)階的傾斜角度大小外,還可以如何描述臺(tái)階的傾斜程度呢?① 可通過(guò)測(cè)量BC與AC的長(zhǎng)度,② 再算出它們的比,來(lái)說(shuō)明臺(tái)階的傾斜程度。(思考:BC與AC長(zhǎng)度的比與臺(tái)階的傾斜程度有何關(guān)系?)答:_________________.③ 討論:你還可以用其它什么方法?能說(shuō)出你的理由嗎?答:________________________.2、思考與探索二:

[教學(xué)目標(biāo)]1、 理解并掌握正弦、余弦的含義,會(huì)在直角三角形中求出某個(gè)銳角的正弦和余弦值。2、能用函數(shù)的觀點(diǎn)理解正弦、余弦和正切。[教學(xué)重點(diǎn)與難點(diǎn)] 在直角三角形中求出某個(gè)銳角的正弦和余弦值。[教學(xué)過(guò)程] 一、情景創(chuàng)設(shè)1、問(wèn)題1:如圖,小明沿著某斜坡向上行走了13m后,他的相對(duì)位置升高了5m,如果他沿著該斜坡行走了20m,那么他的相對(duì)位置升高了多少?行走了a m呢?2、問(wèn)題2:在上述問(wèn)題中,他在水平方向又分別前進(jìn)了多遠(yuǎn)?二、探索活動(dòng)1、思考:從上面的兩個(gè)問(wèn)題可以看出:當(dāng)直角三角形的一個(gè)銳角的大小已確定時(shí),它的對(duì)邊與斜邊的比值________;它的鄰邊與斜邊的比值________。(根據(jù)是__________________。)2、正弦的定義 如圖,在Rt△ABC中,∠C=90°,我們把銳角∠A的對(duì)邊a與斜邊c的比叫做∠A的______,記作________,即:sinA=________=________.3、余弦的定義 如圖,在Rt△ABC中,∠C=90°,我們把銳角∠A的鄰邊b與斜邊c的比叫做∠A的______,記作=_________,即:cosA=______=_____。(你能寫出∠B的正弦、余弦的表達(dá)式嗎?)試試看.___________.

2. 鋼琴的構(gòu)造 鋼琴是西洋古典音樂中的一種鍵盤樂器,由88個(gè)琴鍵(52個(gè)白36個(gè)黑)和金屬弦音板組成?! ≌{(diào)音釘(Tuning Pins)是一些能夠用特制扳手扭動(dòng)旋轉(zhuǎn)的釘狀螺栓。它的旋床是有鎖口的特制高碳鋼,因而琴弦能牢固地繞在弦軸釘上,致使音準(zhǔn)在琴弦高強(qiáng)度拉力作用下能長(zhǎng)期保持并穩(wěn)定下來(lái)?! ∏匍?Hammer)外包著高品質(zhì)的毛氈或絨布,由于這層“皮膚”多是羊毛造的,因而又稱羊毛槌。它本身連著琴鍵,當(dāng)琴鍵被按下時(shí),琴槌便會(huì)打落琴弦上并借著琴弦的振動(dòng)使鋼琴發(fā)出聲音。因此,它的作用是用來(lái)敲擊被調(diào)音釘緊扣著的琴弦。

四、總結(jié)存儲(chǔ)1.教師總結(jié)。縱觀作者對(duì)阿長(zhǎng)形象的刻畫,猶如一部連續(xù)劇。從“喜歡切切察察”,對(duì)“我”過(guò)分看管,到睡相粗俗;從“懂得許多規(guī)矩”,特別是“元旦的古怪儀式”,到給“我”講長(zhǎng)毛的故事,再到“謀害”隱鼠,多側(cè)面多角度地展現(xiàn)出阿長(zhǎng)的個(gè)性特點(diǎn):粗俗好事,迷信無(wú)知,卻又樂天安命,簡(jiǎn)單率性。直到阿長(zhǎng)給“我”買來(lái)《山海經(jīng)》,先抑后揚(yáng)的表達(dá)效果才充分顯現(xiàn),阿長(zhǎng)純樸善良、仁厚慈愛的品格在前文的襯托下顯得格外閃光。而文章末尾,作者飽含深情地祝禱,將全文情感推向高潮。2.課外練筆。在你的童年生活中,有沒有像阿長(zhǎng)這樣給你留下深刻印象的普通人?你怎樣看待他們的優(yōu)缺點(diǎn)?談一談你的想法和感受。(200字左右)【設(shè)計(jì)意圖】在學(xué)生對(duì)課文有了整體的認(rèn)知之后,教師總結(jié)提升。然后要求學(xué)生發(fā)現(xiàn)生活中普通人的閃光點(diǎn),發(fā)現(xiàn)人性美,并進(jìn)行課外練筆,有利于學(xué)生在實(shí)踐中鞏固技能,以讀促寫,讀寫結(jié)合,不僅可以加深對(duì)課文內(nèi)容的理解,還能鍛煉學(xué)生的寫作能力。

吳均是一位善寫山水的大家,他自小好學(xué)而又才智出眾,但“家世寒賤”,性格耿直。在門閥制度相當(dāng)嚴(yán)格的南朝梁,出身于庶族寒門的人,想要在政治上得到重用,著實(shí)不易,再加上他性格直來(lái)直去,口無(wú)遮攔,更是會(huì)四處碰壁。所幸的是,起先著名文史學(xué)家沈約看中了吳均的文章,“頗相稱賞”。接著,吳均得到了刺史柳惲的賞識(shí),提拔他當(dāng)了郡主簿,常在一起賦詩(shī)答對(duì)。他的詩(shī)文“清拔有古氣”,自成一家,時(shí)人紛紛效仿,稱為“吳均體”。書信內(nèi)容為何是山水游記魏晉六朝是中國(guó)歷史上政治最混亂、社會(huì)最痛苦的時(shí)代,然而卻是精神上極自由、極富智慧和藝術(shù)精神的時(shí)代。大自然成了情趣高雅之士審美活動(dòng)的重要背景和舞臺(tái),移情山水成了當(dāng)時(shí)的社會(huì)風(fēng)尚。在書信中描畫山水,寄托情志,成為好友間交流的一種流行方式,文人們通過(guò)書信內(nèi)斂地表露自己的人生取向,他們的文學(xué)經(jīng)歷給后世留下了寶貴的文化遺產(chǎn)。吳均的《與朱元思書》《與施從事書》和《與顧章書》,以及陶弘景的《答謝中書書》皆是如此。

1.理解懷疑精神的內(nèi)涵及重要意義。2.整體感知課文內(nèi)容,梳理作者的論證思路,把握議論文嚴(yán)密的論證結(jié)構(gòu)。【教學(xué)過(guò)程】一、故事激趣,導(dǎo)入新課師:同學(xué)們還記得七年級(jí)時(shí)咱們學(xué)過(guò)的一則寓言故事《穿井得一人》嗎?哪位同學(xué)能給大家再講講這個(gè)故事?預(yù)設(shè):從前宋國(guó)有一戶姓丁的人家,家中沒有水井,經(jīng)常有一個(gè)人在外面專管供水的事兒。后來(lái)他家里打了一口水井,他便高興地對(duì)別人說(shuō):“我家里打井得到了一個(gè)人?!庇腥寺牭搅怂脑?,就傳播說(shuō):“丁家打井挖出了一個(gè)人?!眹?guó)都里的人都在談?wù)撨@件事,一直傳到了宋國(guó)國(guó)君那里。國(guó)君派人去問(wèn)情況。丁家的人回答說(shuō):“是得到了一個(gè)人的勞力,并不是從井中挖出來(lái)一個(gè)人呀?!弊穯?wèn):故事中,為什么會(huì)鬧出這樣的笑話呢?(學(xué)生自由發(fā)言)預(yù)設(shè):傳播這件事的人,沒有弄清事情的真相,不辨真?zhèn)?,以訛傳訛,最終鬧出了笑話。

梁?jiǎn)⒊?873—1929),字卓如,號(hào)任公,別號(hào)飲冰室主人。廣東新會(huì)人,思想家、學(xué)者。清朝光緒年間舉人,戊戌變法(百日維新)領(lǐng)袖之一、中國(guó)近代維新派、新法家代表人物。幼年受傳統(tǒng)教育,光緒十年(1884)中秀才,1889年中舉。后從師于康有為,成為資產(chǎn)階級(jí)改良派的宣傳家。維新變法前,協(xié)助康有為一起聯(lián)合在京應(yīng)試舉人發(fā)動(dòng)“公車上書”運(yùn)動(dòng),此后先后領(lǐng)導(dǎo)北京和上海的強(qiáng)學(xué)會(huì),又與黃遵憲一起辦《時(shí)務(wù)報(bào)》,任長(zhǎng)沙時(shí)務(wù)學(xué)堂的總教習(xí),并著《變法通議》為變法做宣傳。戊戌變法失敗后,逃亡日本。晚年任清華國(guó)學(xué)研究院導(dǎo)師。他一生著述頗豐,著有《清代學(xué)術(shù)概論》《中國(guó)近三百年學(xué)術(shù)史》等,著作大多收入《飲冰室合集》。文學(xué)知識(shí)議論文議論文是一種以議論為主要表達(dá)方式,通過(guò)擺事實(shí)、講道理,直接表達(dá)作者的觀點(diǎn)和主張的常用文體。論點(diǎn)、論據(jù)和論證,是議論文的三要素。

(一)舊知回顧(老師提出問(wèn)題,同學(xué)回答。紅色部分為學(xué)生回答后,老師給出的答案。)1、通過(guò)上節(jié)課的學(xué)習(xí),你知道除了正數(shù)還有哪些數(shù)?答:1)0和負(fù)數(shù)。2)0既不是正數(shù),也不是負(fù)數(shù)。2、用正數(shù)和負(fù)數(shù)表示具有相反意義的量。舉例:如果把一個(gè)物體向后移動(dòng)5m,記作移動(dòng)-5m;那么這個(gè)物體向前移動(dòng)5m,記作移動(dòng)5m。原地不動(dòng),記作移動(dòng)0m。

一、談話導(dǎo)入師:同學(xué)們,中國(guó)有句俗話叫“民以食為天”,你們喜歡美食嗎?(喜歡)老師也喜歡吃,不過(guò)我們可別光顧著吃,我們要認(rèn)識(shí)它,還要記住他們的名字。(課件出示米糕圖片)。1、師:看,老師給你們帶來(lái)了什么?(米糕)生活中,你們除了吃過(guò)米糕,還吃過(guò)什么糕呢?(課件出示詞語(yǔ):蛋糕、雪糕、糕點(diǎn)。)領(lǐng)讀詞語(yǔ)。2、師:不論是蛋糕、雪糕,還是糕點(diǎn),味道上都有一個(gè)共同點(diǎn)是()?甜,是因?yàn)樵诶锩婕尤肓颂?,(出示糖的卡片認(rèn)讀生字“糖”)課件出示生活中常見的糖的圖片,齊讀詞語(yǔ)。3、引導(dǎo)觀察生字“糕、糖”,發(fā)現(xiàn)共同點(diǎn),引出“粉”。交流“粉”的識(shí)字方法,引出“芬、份、紛、扮”,出示詞語(yǔ):粉絲、粉筆、面粉。齊讀。
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