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人教版高中數(shù)學(xué)選修3離散型隨機變量及其分布列(1)教學(xué)設(shè)計
4.寫出下列隨機變量可能取的值，并說明隨機變量所取的值表示的隨機試驗的結(jié)果．(1)一個袋中裝有8個紅球，3個白球，從中任取5個球，其中所含白球的個數(shù)為X.(2)一個袋中有5個同樣大小的黑球，編號為1,2,3,4,5，從中任取3個球，取出的球的最大號碼記為X.(3). 在本例(1)條件下，規(guī)定取出一個紅球贏2元，而每取出一個白球輸1元，以ξ表示贏得的錢數(shù)，結(jié)果如何？[解] (1)X可取0,1,2,3.X＝0表示取5個球全是紅球；X＝1表示取1個白球，4個紅球；X＝2表示取2個白球，3個紅球；X＝3表示取3個白球，2個紅球．(2)X可取3,4,5.X＝3表示取出的球編號為1,2,3；X＝4表示取出的球編號為1,2,4；1,3,4或2,3,4.X＝5表示取出的球編號為1,2,5；1,3,5；1,4,5；2,3,5；2,4,5或3,4,5.(3) ξ＝10表示取5個球全是紅球；ξ＝7表示取1個白球，4個紅球；ξ＝4表示取2個白球，3個紅球；ξ＝1表示取3個白球，2個紅球．
人教版高中數(shù)學(xué)選修3離散型隨機變量的均值教學(xué)設(shè)計
對于離散型隨機變量，可以由它的概率分布列確定與該隨機變量相關(guān)事件的概率。但在實際問題中，有時我們更感興趣的是隨機變量的某些數(shù)字特征。例如，要了解某班同學(xué)在一次數(shù)學(xué)測驗中的總體水平，很重要的是看平均分；要了解某班同學(xué)數(shù)學(xué)成績是否“兩極分化”則需要考察這個班數(shù)學(xué)成績的方差。我們還常常希望直接通過數(shù)字來反映隨機變量的某個方面的特征，最常用的有期望與方差.二、 探究新知探究1.甲乙兩名射箭運動員射中目標(biāo)靶的環(huán)數(shù)的分布列如下表所示：如何比較他們射箭水平的高低呢？環(huán)數(shù)X 7 8 9 10甲射中的概率 0.1 0.2 0.3 0.4乙射中的概率 0.15 0.25 0.4 0.2類似兩組數(shù)據(jù)的比較,首先比較擊中的平均環(huán)數(shù),如果平均環(huán)數(shù)相等，再看穩(wěn)定性.假設(shè)甲射箭n次，射中7環(huán)、8環(huán)、9環(huán)和10環(huán)的頻率分別為：甲n次射箭射中的平均環(huán)數(shù)當(dāng)n足夠大時，頻率穩(wěn)定于概率，所以x穩(wěn)定于7×0.1+8×0.2+9×0.3+10×0.4=9.即甲射中平均環(huán)數(shù)的穩(wěn)定值(理論平均值)為9,這個平均值的大小可以反映甲運動員的射箭水平.同理，乙射中環(huán)數(shù)的平均值為7×0.15+8×0.25+9×0.4+10×0.2=8.65.
人教版高中數(shù)學(xué)選修3離散型隨機變量的方差教學(xué)設(shè)計
3.下結(jié)論.依據(jù)均值和方差做出結(jié)論.跟蹤訓(xùn)練2. A、B兩個投資項目的利潤率分別為隨機變量X1和X2，根據(jù)市場分析， X1和X2的分布列分別為X1 2% 8% 12% X2 5% 10%P 0.2 0.5 0.3 P 0.8 0.2求：(1)在A、B兩個項目上各投資100萬元， Y1和Y2分別表示投資項目A和B所獲得的利潤，求方差D(Y1)和D(Y2)；(2)根據(jù)得到的結(jié)論，對于投資者有什么建議？ 解：(1)題目可知，投資項目A和B所獲得的利潤Y1和Y2的分布列為：Y1 2 8 12 Y2 5 10P 0.2 0.5 0.3 P 0.8 0.2所以 ;; 解：(2) 由(1)可知 ，說明投資A項目比投資B項目期望收益要高；同時 ，說明投資A項目比投資B項目的實際收益相對于期望收益的平均波動要更大.因此，對于追求穩(wěn)定的投資者，投資B項目更合適;而對于更看重利潤并且愿意為了高利潤承擔(dān)風(fēng)險的投資者，投資A項目更合適.
人教版高中數(shù)學(xué)選修3分類變量與列聯(lián)表教學(xué)設(shè)計
一、 問題導(dǎo)學(xué)前面兩節(jié)所討論的變量,如人的身高、樹的胸徑、樹的高度、短跑100m世界紀(jì)錄和創(chuàng)紀(jì)錄的時間等,都是數(shù)值變量,數(shù)值變量的取值為實數(shù).其大小和運算都有實際含義.在現(xiàn)實生活中,人們經(jīng)常需要回答一定范圍內(nèi)的兩種現(xiàn)象或性質(zhì)之間是否存在關(guān)聯(lián)性或相互影響的問題.例如,就讀不同學(xué)校是否對學(xué)生的成績有影響,不同班級學(xué)生用于體育鍛煉的時間是否有差別,吸煙是否會增加患肺癌的風(fēng)險,等等,本節(jié)將要學(xué)習(xí)的獨立性檢驗方法為我們提供了解決這類問題的方案。在討論上述問題時,為了表述方便,我們經(jīng)常會使用一種特殊的隨機變量,以區(qū)別不同的現(xiàn)象或性質(zhì),這類隨機變量稱為分類變量.分類變量的取值可以用實數(shù)表示,例如,學(xué)生所在的班級可以用1,2,3等表示,男性、女性可以用1,0表示,等等.在很多時候,這些數(shù)值只作為編號使用,并沒有通常的大小和運算意義,本節(jié)我們主要討論取值于{0,1}的分類變量的關(guān)聯(lián)性問題.
人教版高中數(shù)學(xué)選修3離散型隨機變量及其分布列(2)教學(xué)設(shè)計
溫故知新 1.離散型隨機變量的定義可能取值為有限個或可以一一列舉的隨機變量,我們稱為離散型隨機變量.通常用大寫英文字母表示隨機變量,例如X,Y,Z;用小寫英文字母表示隨機變量的取值,例如x,y,z.隨機變量的特點: 試驗之前可以判斷其可能出現(xiàn)的所有值，在試驗之前不可能確定取何值；可以用數(shù)字表示2、隨機變量的分類①離散型隨機變量:X的取值可一、一列出；②連續(xù)型隨機變量:X可以取某個區(qū)間內(nèi)的一切值隨機變量將隨機事件的結(jié)果數(shù)量化．3、古典概型:①試驗中所有可能出現(xiàn)的基本事件只有有限個；②每個基本事件出現(xiàn)的可能性相等。二、探究新知探究1.拋擲一枚骰子,所得的點數(shù)X有哪些值？取每個值的概率是多少？ 因為X取值范圍是{1，2，3，4，5，6}而且"P(X=m)"=1/6,m=1,2,3,4,5,6.因此X分布列如下表所示
人教版高中數(shù)學(xué)選修3二項式系數(shù)的性質(zhì)教學(xué)設(shè)計
1.對稱性與首末兩端“等距離”的兩個二項式系數(shù)相等,即C_n^m=C_n^(n"-" m).2.增減性與最大值 當(dāng)k(n+1)/2時,C_n^k隨k的增加而減小.當(dāng)n是偶數(shù)時,中間的一項C_n^(n/2)取得最大值;當(dāng)n是奇數(shù)時,中間的兩項C_n^((n"-" 1)/2) 與C_n^((n+1)/2)相等,且同時取得最大值.探究2.已知(1+x)^n =C_n^0+C_n^1 x+...〖+C〗_n^k x^k+...+C_n^n x^n 3.各二項式系數(shù)的和C_n^0+C_n^1+C_n^2+…+C_n^n=2n.令x=1 得(1+1)^n=C_n^0+C_n^1 +...+C_n^n=2^n所以，(a+b)^n 的展開式的各二項式系數(shù)之和為2^n1. 在(a+b)8的展開式中,二項式系數(shù)最大的項為 ,在(a+b)9的展開式中,二項式系數(shù)最大的項為 . 解析:因為(a+b)8的展開式中有9項,所以中間一項的二項式系數(shù)最大,該項為C_8^4a4b4=70a4b4.因為(a+b)9的展開式中有10項,所以中間兩項的二項式系數(shù)最大,這兩項分別為C_9^4a5b4=126a5b4,C_9^5a4b5=126a4b5.答案:1.70a4b4 126a5b4與126a4b5 2. A=C_n^0+C_n^2+C_n^4+…與B=C_n^1+C_n^3+C_n^5+…的大小關(guān)系是( )A.A>B B.A=B C.A<B D.不確定 解析:∵(1+1)n=C_n^0+C_n^1+C_n^2+…+C_n^n=2n,(1-1)n=C_n^0-C_n^1+C_n^2-…+(-1)nC_n^n=0,∴C_n^0+C_n^2+C_n^4+…=C_n^1+C_n^3+C_n^5+…=2n-1,即A=B.答案:B
人教版高中數(shù)學(xué)選修3一元線性回歸模型及其應(yīng)用教學(xué)設(shè)計
1.確定研究對象，明確哪個是解釋變量，哪個是響應(yīng)變量；2.由經(jīng)驗確定非線性經(jīng)驗回歸方程的模型；3.通過變換，將非線性經(jīng)驗回歸模型轉(zhuǎn)化為線性經(jīng)驗回歸模型；4.按照公式計算經(jīng)驗回歸方程中的參數(shù)，得到經(jīng)驗回歸方程；5.消去新元，得到非線性經(jīng)驗回歸方程；6.得出結(jié)果后分析殘差圖是否有異常 ．跟蹤訓(xùn)練1.一只藥用昆蟲的產(chǎn)卵數(shù)y與一定范圍內(nèi)的溫度x有關(guān)，現(xiàn)收集了6組觀測數(shù)據(jù)列于表中： 經(jīng)計算得： 線性回歸殘差的平方和: ∑_(i=1)^6?〖(y_i-(y_i ) ?)〗^2=236,64,e^8.0605≈3167.其中 分別為觀測數(shù)據(jù)中的溫度和產(chǎn)卵數(shù)，i=1,2,3,4,5,6.(1)若用線性回歸模型擬合，求y關(guān)于x的回歸方程 (精確到0.1）；(2)若用非線性回歸模型擬合，求得y關(guān)于x回歸方程為 且相關(guān)指數(shù)R2＝0.9522． ①試與(1)中的線性回歸模型相比較，用R2說明哪種模型的擬合效果更好 ?②用擬合效果好的模型預(yù)測溫度為35℃時該種藥用昆蟲的產(chǎn)卵數(shù).(結(jié)果取整數(shù)).
人教A版高中數(shù)學(xué)必修一兩角和與差的正弦、余弦和正切公式教學(xué)設(shè)計（1）
本節(jié)課選自《普通高中課程標(biāo)準(zhǔn)實驗教科書數(shù)學(xué)必修1本（A版）》第五章的5.5.1 兩角和與差的正弦、余弦和正切公式。本節(jié)的主要內(nèi)容是由兩角差的余弦公式的推導(dǎo)，運用誘導(dǎo)公式、同角三角函數(shù)的基本關(guān)系和代數(shù)變形，得到其它的和差角公式。讓學(xué)生感受數(shù)形結(jié)合及轉(zhuǎn)化的思想方法。發(fā)展學(xué)生數(shù)學(xué)直觀、數(shù)學(xué)抽象、邏輯推理、數(shù)學(xué)建模的核心素養(yǎng)。課程目標(biāo) 學(xué)科素養(yǎng)1.了解兩角差的余弦公式的推導(dǎo)過程．2．掌握由兩角差的余弦公式推導(dǎo)出兩角和的余弦公式及兩角和與差的正弦、正切公式．3．熟悉兩角和與差的正弦、余弦、正切公式的靈活運用，了解公式的正用、逆用以及角的變換的常用方法．4.通過正切函數(shù)圖像與性質(zhì)的探究，培養(yǎng)學(xué)生數(shù)形結(jié)合和類比的思想方法。 a.數(shù)學(xué)抽象：公式的推導(dǎo)；b.邏輯推理：公式之間的聯(lián)系；c.數(shù)學(xué)運算：運用和差角角公式求值；d.直觀想象：兩角差的余弦公式的推導(dǎo)；e.數(shù)學(xué)建模：公式的靈活運用；
人教A版高中數(shù)學(xué)必修一兩角和與差的正弦、余弦和正切公式教學(xué)設(shè)計（2）
本節(jié)內(nèi)容是三角恒等變形的基礎(chǔ)，是正弦線、余弦線和誘導(dǎo)公式等知識的延伸，同時，它又是兩角和、差、倍、半角等公式的“源頭”。兩角和與差的正弦、余弦、正切是本章的重要內(nèi)容，對于三角變換、三角恒等式的證明和三角函數(shù)式的化簡、求值等三角問題的解決有著重要的支撐作用。 課程目標(biāo)1、能夠推導(dǎo)出兩角和與差的正弦、余弦、正切公式并能應(yīng)用; 2、掌握二倍角公式及變形公式，能靈活運用二倍角公式解決有關(guān)的化簡、求值、證明問題．?dāng)?shù)學(xué)學(xué)科素養(yǎng)1.數(shù)學(xué)抽象：兩角和與差的正弦、余弦和正切公式； 2.邏輯推理： 運用公式解決基本三角函數(shù)式的化簡、證明等問題；3.數(shù)學(xué)運算：運用公式解決基本三角函數(shù)式求值問題.4.數(shù)學(xué)建模：學(xué)生體會到一般與特殊，換元等數(shù)學(xué)思想在三角恒等變換中的作用。.
人教A版高中數(shù)學(xué)必修二有限樣本空間與隨機事件事件的關(guān)系和運算教學(xué)設(shè)計
新知講授（一）——隨機試驗 我們把對隨機現(xiàn)象的實現(xiàn)和對它的觀察稱為隨機試驗，簡稱試驗，常用字母E表示。我們通常研究以下特點的隨機試驗：（1）試驗可以在相同條件下重復(fù)進(jìn)行；（2）試驗的所有可能結(jié)果是明確可知的，并且不止一個；（3）每次試驗總是恰好出現(xiàn)這些可能結(jié)果中的一個，但事先不確定出現(xiàn)哪個結(jié)果。新知講授（二）——樣本空間思考一：體育彩票搖獎時，將10個質(zhì)地和大小完全相同、分別標(biāo)號0，1，2，...，9的球放入搖獎器中，經(jīng)過充分?jǐn)嚢韬髶u出一個球，觀察這個球的號碼。這個隨機試驗共有多少個可能結(jié)果？如何表示這些結(jié)果？根據(jù)球的號碼，共有10種可能結(jié)果。如果用m表示“搖出的球的號碼為m”這一結(jié)果，那么所有可能結(jié)果可用集合表示{0，1，2，3，4，5，6，7，8，9}.我們把隨機試驗E的每個可能的基本結(jié)果稱為樣本點，全體樣本點的集合稱為試驗E的樣本空間。
人教A版高中數(shù)學(xué)必修一二次函數(shù)與一元二次方程、不等式教學(xué)設(shè)計（2）
三個“二次”即一元二次函數(shù)、一元二次方程、一元二次不等式是高中數(shù)學(xué)的重要內(nèi)容，具有豐富的內(nèi)涵和密切的聯(lián)系，同時也是研究包含二次曲線在內(nèi)的許多內(nèi)容的工具 高考試題中近一半的試題與這三個“二次”問題有關(guān) 本節(jié)主要是幫助考生理解三者之間的區(qū)別及聯(lián)系，掌握函數(shù)、方程及不等式的思想和方法。課程目標(biāo)1. 通過探索，使學(xué)生理解二次函數(shù)與一元二次方程，一元二次不等式之間的聯(lián)系。2. 使學(xué)生能夠運用二次函數(shù)及其圖像，性質(zhì)解決實際問題． 3. 滲透數(shù)形結(jié)合思想，進(jìn)一步培養(yǎng)學(xué)生綜合解題能力。數(shù)學(xué)學(xué)科素養(yǎng)1.數(shù)學(xué)抽象：一元二次函數(shù)與一元二次方程，一元二次不等式之間的聯(lián)系；2.邏輯推理：一元二次不等式恒成立問題；3.數(shù)學(xué)運算：解一元二次不等式；4.數(shù)據(jù)分析：一元二次不等式解決實際問題；5.數(shù)學(xué)建模：運用數(shù)形結(jié)合的思想，逐步滲透一元二次函數(shù)與一元二次方程，一元二次不等式之間的聯(lián)系。
高中思想政治人教版必修三《文化創(chuàng)新的途徑》說課稿
二、說學(xué)情本課的教學(xué)對象為高二學(xué)生，他們思維活躍已具備一定歸納能力和分析、綜合能力，能夠自主地分析現(xiàn)實生活中的一些文化行為，但看問題往往比較偏激、片面，缺乏良好的邏輯思維能力。所以，在文化創(chuàng)新的途徑上要對他們進(jìn)行指導(dǎo)，以免走入誤區(qū)。三、教學(xué)目標(biāo)根據(jù)新課程標(biāo)準(zhǔn)、教材特點、學(xué)生的實際，我確定了如下教學(xué)目標(biāo)：【知識與能力目標(biāo)】1.理解文化創(chuàng)新的根本途徑和兩個基本途徑;2.了解文化創(chuàng)新過程中需要堅持正確方向，克服錯誤傾向。
人教A版高中數(shù)學(xué)必修一冪函數(shù)教學(xué)設(shè)計（2）
冪函數(shù)是在繼一次函數(shù)、反比例函數(shù)、二次函數(shù)之后，又學(xué)習(xí)了單調(diào)性、最值、奇偶性的基礎(chǔ)上，借助實例，總結(jié)出冪函數(shù)的概念，再借助圖像研究冪函數(shù)的性質(zhì).課程目標(biāo)1、理解冪函數(shù)的概念，會畫冪函數(shù)y=x，y=x2，y=x3，y=x－1，y=x 的圖象；2、結(jié)合這幾個冪函數(shù)的圖象，理解冪函數(shù)圖象的變化情況和性質(zhì)；3、通過觀察、總結(jié)冪函數(shù)的性質(zhì)，培養(yǎng)學(xué)生概括抽象和識圖能力．?dāng)?shù)學(xué)學(xué)科素養(yǎng)1.數(shù)學(xué)抽象：用數(shù)學(xué)語言表示函數(shù)冪函數(shù)；2.邏輯推理：常見冪函數(shù)的性質(zhì)；3.數(shù)學(xué)運算：利用冪函數(shù)的概念求參數(shù)；4.數(shù)據(jù)分析：比較冪函數(shù)大??；5.數(shù)學(xué)建模：在具體問題情境中，運用數(shù)形結(jié)合思想，利用冪函數(shù)性質(zhì)、圖像特點解決實際問題。重點：常見冪函數(shù)的概念、圖象和性質(zhì)；難點：冪函數(shù)的單調(diào)性及比較兩個冪值的大?。?/p>
新人教版高中英語必修2Unit 3 The Internet-Reading For Writing教案一
⑦identity theft 身份盜竊⑧chat room 聊天室⑨draft your blog post 起草博客帖子⑩post embarrassing photos 張貼尷尬照片 【話題句式】 1. How do you stay safe online and avoid bad experiences on the Internet? 你如何在網(wǎng)上保持安全, 避免在網(wǎng)上的不良經(jīng)歷? 2. I’m not an expert, but many years as a blogger have taught me a thing or two. 我不是專家, 但作為一個博主, 我已經(jīng)學(xué)了好幾年了。 3. If you see or read something that makes you feel uncomfortable, leave the site immediately. 如果你看到或讀到一些讓你覺得不舒服的東西, 立即離開這個網(wǎng)站。4. Don’t give out your address or phone number. 別告訴別人你的地址或電話號碼。 5. Identity theft is a common and serious problem. 身份盜竊是一個常見而嚴(yán)重的問題。6. Being online is no excuse for being rude, and you don’t want to become a target for a troll or cyberbully. 上網(wǎng)并不是無禮的借口, 你也不想成為發(fā)挑釁帖子的人或網(wǎng)絡(luò)惡霸的目標(biāo)。 7. Trolls often use several false names so that they can stay on a site. 發(fā)挑釁帖子的人經(jīng)常使用幾個假名, 這樣他們就可以留在一個網(wǎng)站上。8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。
新人教版高中英語必修1Unit 3 Sports and Fitness-Reading and Thinking教案
2. Sort out detailed information about Michael Jordan.（1） Understand the transitional sentence.Q: Which part is about Michael Jordan as a master? Which part is about the example he set?（2） Have the Ss Focus on why Michael Jordan is a master and what good examples Michael Jordan set when they’re reading. And think about these questions as below:Q1: How does the author describe his impressive skills?Q2: How do you understand “time seemed to stand still”?Q3: What does “graceful” mean?Q4. Which sentence do you think best describes his mental strength?Q5. Which words is important in the sentence in describing his mental strength? Why?Q6: How do you understand “unique”?Q7: What can we learn from Michael Jordan?Step 5 Discussing and recommendingRecommend their own living legends of sports.Work in groups to choose your own living legend of sports and give the reasons of your choice. Step 6 HomeworkReview the stories of Lang Ping and Michael Jordan, and try to retell them.
新人教版高中英語必修1Unit 3 Sports and Fitness-Reading for Writing教案
Then have them write a short paragraph to describe and explain their changes. After that, get the Ss to exchange their drafts with their partners and use the checklist to give feedback on their drafts, and finally revise it.Step 5 Summary of how to write a wellness book1.健康書的審題步驟：第一步：明確要求該寫作屬于經(jīng)驗分享，故要用第一人稱來寫;時態(tài)以一股現(xiàn)在時為主。第二步：確定段落該類文章可以從以下三個方面人手:Para.1首先表明寫作的目的Para.2自己的做法及心得體會Para.3表示期望及感謝第三步：提煉要點2.健康書常見句式：1) It is an honor for me to share my favorite sport with you,2) It makes me feel relaxed playing with my friends.3) It makes me rid myself of stress while playing with my friends.4) Moreover, it provides me a valuable chance to communicate with others.5) I we eat too little or too much, or if we choose the wrong food, we may become sick.6) We can do something to change the poor situation.Step 6Homework假如你的老師讓你在班級Wellness Bok上分享自己的親身經(jīng)歷及心得，請根據(jù)以下要點寫一篇80字左右的文章1. 你喜歡的運動是什么？2. 你最喜歡的原因是什么？3. 你參加鍛煉的體會。
新人教版高中英語必修2Unit 3 The Internet-Listening &Speaking＆Talking教案二
From the pictures in the text and the title--- choose the best app, we can know that this part is about how to save money by using apps.Step 2 While-listening1. Laura and Xiao Bo are talking about apps. Listen to their conversation and find out what apps they want.Xiao Bo is looking for a(n) exercise app to help him get in shape.Laura would like an app for getting rich and another that will make her grades better.2. Listen again. Are the sentences true T or false F?1). Both of Xiao Bo's apps keep track of the steps he takes._____2). Xiao Bo's second app can help him make a fitness plan._____3). Laura needs an app that will help her get discounts.______4). Laura needs an app that will add money to her bank account._______F T F T3. Listen once more and tick the sentence you hear. Underline the words used to express predictions, guesses, and beliefs.Predictions, Guesses, and Beliefs________It might help me walk more.________My guess is that it wouldn't work.________I imagine this app would help me get fit faster________I suppose that would be good.________I guess you could save a little with this app.________I suppose there would be some problems, too.________I believe this app could help me get thinner.
新人教版高中英語必修2Unit 3 The Internet-Listening &Speaking＆Talking教案一
Listening and Speaking introduces the topic of “ask about online habits”. Many middle school students have been surfing the Internet for many years, but what they do with the Internet and how much time they spend every day may not be very clear to themselves, nor to other students. This section allows students to investigate their peers' Internet use, which is conducive to their mutual understanding and understanding of the Internet. It can also help them reflect on their own online behavior, learn from other people's good online habits, and get rid of their bad online behavior.The listening text of this section is an investigation interview. The investigators interview specific groups with the same questions to obtain information, so as to understand their views, practices or attitudes on this issue. There are two specific questions: “how much time do you spend online every day? What do you usually do online?”. The answers of the three respondents provide rich and different information, and achieve the purpose of the investigators. The oral discourse structure of survey interviews generally includes greeting and explaining the purpose of the interview, presenting the interview questions and the respondents' answers. Listening and Talking introduces the theme of “choosing the right application ". Listening text is a conversation between Laura and Xiao Bo. In this part of listening, “oink”； “piggy bank” may cause the students' hearing comprehension limitation. Oink refers to sound word and pig's sound. So, add some oink to my piggy bank is often used to describe "making a little money".1. Guide students to understand the content of listening texts in terms of listening for definitions.2. Cultivate students' ability to define words and understand an investigation interview.
新人教版高中英語必修2Unit 3 The Internet-Reading and Thinking教案二
Q5：What's Jan's next goal?Her next goal is to start a charity website to raise money for children in poor countries.Q6：What can we learn from her experiences?We learn that when we go through tough times, we can find help and support from other people online. We learn that we can feel less lonelyStep 5: While reading---rethinkingQ1: What is Jan’s attitude to the Internet ?Thankful/Grateful, because it has changed her and her life.Q2: What writing skills is used in the article ?Examples(Jan’s example, the 59-year-old man’s and the 61-year-old woman’s example)Q3: Can you get the main idea of the article ?The Internet has changed Jan’s life/Jan’s life has been changed by the Internet.Step 6 Post reading---Retell the storyMuch has been written about the wonders of the World Wide Web. There are countless articles (1)telling(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)more(much) for people than simply make life more convenient. People’s lives (3) have been changed(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)stuck(stick) at home with only her computer to keep (5)her(she) company. She joined an online group (6)where she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)benefits(benefit). She was so inspired (8)that she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)for children in poor countries. Jan’s life has been (10)greatly(great) improved by the Internet.
新人教版高中英語必修2Unit 3 The Internet-Reading and Thinking教案一
Paragraph 3. Jan decided to start an IT club to teach old people how to use computers and the Internet. Paragraph 4. Jan has started taking online classes to learn more about how to use the Internet to make society better. Paragraph 5. Jan’s life has been greatly improved by the Internet. Step 5: Critical thinking:(1)How do you arrange your time spent on study and the Internet? Is it reasonable? I usually surf the Internet using my mobile phone for only an hour after class, and it is reasonable for me.(2)What are your online activities? Are they safe? I chat with my friends, read news and play games. I never give away my private information so I think they are safe.Step 4: summary Much has been written about the wonders of the World Wide Web. There are countless articles (1)______(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)_____(much) for people than simply make life more convenient. People’s lives (3) _________________(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)_____(stick) at home with only her computer to keep (5)___(she) company. She joined an online group (6)______ she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)_______(benefit). She was so inspired (8)____ she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)___ children in poor countries. Jan’s life has been (10)______(great) improved by the Internet. Step 5 Homework:Review what we have learned and find out the key language points in the text.
