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人教版高中數(shù)學(xué)選修3離散型隨機(jī)變量及其分布列(2)教學(xué)設(shè)計(jì)
溫故知新 1.離散型隨機(jī)變量的定義可能取值為有限個(gè)或可以一一列舉的隨機(jī)變量,我們稱為離散型隨機(jī)變量.通常用大寫英文字母表示隨機(jī)變量,例如X,Y,Z;用小寫英文字母表示隨機(jī)變量的取值,例如x,y,z.隨機(jī)變量的特點(diǎn): 試驗(yàn)之前可以判斷其可能出現(xiàn)的所有值，在試驗(yàn)之前不可能確定取何值；可以用數(shù)字表示2、隨機(jī)變量的分類①離散型隨機(jī)變量:X的取值可一、一列出；②連續(xù)型隨機(jī)變量:X可以取某個(gè)區(qū)間內(nèi)的一切值隨機(jī)變量將隨機(jī)事件的結(jié)果數(shù)量化．3、古典概型:①試驗(yàn)中所有可能出現(xiàn)的基本事件只有有限個(gè)；②每個(gè)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(diǎn)數(shù)X有哪些值？取每個(gè)值的概率是多少？ 因?yàn)閄取值范圍是{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(xiàng)式系數(shù)的性質(zhì)教學(xué)設(shè)計(jì)
1.對(duì)稱性與首末兩端“等距離”的兩個(gè)二項(xiàng)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(shí),C_n^k隨k的增加而減小.當(dāng)n是偶數(shù)時(shí),中間的一項(xiàng)C_n^(n/2)取得最大值;當(dāng)n是奇數(shù)時(shí),中間的兩項(xiàng)C_n^((n"-" 1)/2) 與C_n^((n+1)/2)相等,且同時(shí)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(xiàng)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(xiàng)式系數(shù)之和為2^n1. 在(a+b)8的展開式中,二項(xiàng)式系數(shù)最大的項(xiàng)為 ,在(a+b)9的展開式中,二項(xiàng)式系數(shù)最大的項(xiàng)為 . 解析:因?yàn)?a+b)8的展開式中有9項(xiàng),所以中間一項(xiàng)的二項(xiàng)式系數(shù)最大,該項(xiàng)為C_8^4a4b4=70a4b4.因?yàn)?a+b)9的展開式中有10項(xiàng),所以中間兩項(xiàng)的二項(xiàng)式系數(shù)最大,這兩項(xiàng)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(jì)
1.確定研究對(duì)象，明確哪個(gè)是解釋變量，哪個(gè)是響應(yīng)變量；2.由經(jīng)驗(yàn)確定非線性經(jīng)驗(yàn)回歸方程的模型；3.通過變換，將非線性經(jīng)驗(yàn)回歸模型轉(zhuǎn)化為線性經(jīng)驗(yàn)回歸模型；4.按照公式計(jì)算經(jīng)驗(yàn)回歸方程中的參數(shù)，得到經(jīng)驗(yàn)回歸方程；5.消去新元，得到非線性經(jīng)驗(yàn)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(cè)數(shù)據(jù)列于表中： 經(jīng)計(jì)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(cè)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(cè)溫度為35℃時(shí)該種藥用昆蟲的產(chǎn)卵數(shù).(結(jié)果取整數(shù)).
人教版高中數(shù)學(xué)選修3成對(duì)數(shù)據(jù)的相關(guān)關(guān)系教學(xué)設(shè)計(jì)
由樣本相關(guān)系數(shù)??≈0.97,可以推斷脂肪含量和年齡這兩個(gè)變量正線性相關(guān)，且相關(guān)程度很強(qiáng)。脂肪含量與年齡變化趨勢(shì)相同.歸納總結(jié)1．線性相關(guān)系數(shù)是從數(shù)值上來判斷變量間的線性相關(guān)程度，是定量的方法．與散點(diǎn)圖相比較，線性相關(guān)系數(shù)要精細(xì)得多，需要注意的是線性相關(guān)系數(shù)r的絕對(duì)值小，只是說明線性相關(guān)程度低，但不一定不相關(guān)，可能是非線性相關(guān)．2．利用相關(guān)系數(shù)r來檢驗(yàn)線性相關(guān)顯著性水平時(shí)，通常與0.75作比較，若|r|>0.75，則線性相關(guān)較為顯著，否則不顯著．例2. 有人收集了某城市居民年收入(所有居民在一年內(nèi)收入的總和)與A商品銷售額的10年數(shù)據(jù),如表所示.畫出散點(diǎn)圖，判斷成對(duì)樣本數(shù)據(jù)是否線性相關(guān)，并通過樣本相關(guān)系數(shù)推斷居民年收入與A商品銷售額的相關(guān)程度和變化趨勢(shì)的異同.
人教版高中數(shù)學(xué)選修3離散型隨機(jī)變量的方差教學(xué)設(shè)計(jì)
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(gè)投資項(xiàng)目的利潤(rùn)率分別為隨機(jī)變量X1和X2，根據(jù)市場(chǎng)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(gè)項(xiàng)目上各投資100萬元， Y1和Y2分別表示投資項(xiàng)目A和B所獲得的利潤(rùn)，求方差D(Y1)和D(Y2)；(2)根據(jù)得到的結(jié)論，對(duì)于投資者有什么建議？ 解：(1)題目可知，投資項(xiàng)目A和B所獲得的利潤(rùn)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(xiàng)目比投資B項(xiàng)目期望收益要高；同時(shí) ，說明投資A項(xiàng)目比投資B項(xiàng)目的實(shí)際收益相對(duì)于期望收益的平均波動(dòng)要更大.因此，對(duì)于追求穩(wěn)定的投資者，投資B項(xiàng)目更合適;而對(duì)于更看重利潤(rùn)并且愿意為了高利潤(rùn)承擔(dān)風(fēng)險(xiǎn)的投資者，投資A項(xiàng)目更合適.
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(jì)（2）
三個(gè)“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(shí)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(gè)“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(yùn)用二次函數(shù)及其圖像，性質(zhì)解決實(shí)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(yùn)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(shí)際問題；5.數(shù)學(xué)建模：運(yùn)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。
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(jì)（1）
本節(jié)課選自《普通高中課程標(biāo)準(zhǔn)實(shí)驗(yàn)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(yùn)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(yùn)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(yùn)算：運(yùn)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(yùn)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(jì)（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(shí)的延伸，同時(shí)，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(duì)于三角變換、三角恒等式的證明和三角函數(shù)式的化簡(jiǎn)、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(yùn)用二倍角公式解決有關(guān)的化簡(jiǎn)、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(yùn)用公式解決基本三角函數(shù)式的化簡(jiǎn)、證明等問題；3.數(shù)學(xué)運(yùn)算：運(yùn)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(huì)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(jī)事件事件的關(guān)系和運(yùn)算教學(xué)設(shè)計(jì)
新知講授（一）——隨機(jī)試驗(yàn) 我們把對(duì)隨機(jī)現(xiàn)象的實(shí)現(xiàn)和對(duì)它的觀察稱為隨機(jī)試驗(yàn)，簡(jiǎn)稱試驗(yàn)，常用字母E表示。我們通常研究以下特點(diǎn)的隨機(jī)試驗(yàn)：（1）試驗(yàn)可以在相同條件下重復(fù)進(jìn)行；（2）試驗(yàn)的所有可能結(jié)果是明確可知的，并且不止一個(gè)；（3）每次試驗(yàn)總是恰好出現(xiàn)這些可能結(jié)果中的一個(gè)，但事先不確定出現(xiàn)哪個(gè)結(jié)果。新知講授（二）——樣本空間思考一：體育彩票搖獎(jiǎng)時(shí)，將10個(gè)質(zhì)地和大小完全相同、分別標(biāo)號(hào)0，1，2，...，9的球放入搖獎(jiǎng)器中，經(jīng)過充分?jǐn)嚢韬髶u出一個(gè)球，觀察這個(gè)球的號(hào)碼。這個(gè)隨機(jī)試驗(yàn)共有多少個(gè)可能結(jié)果？如何表示這些結(jié)果？根據(jù)球的號(hào)碼，共有10種可能結(jié)果。如果用m表示“搖出的球的號(hào)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(jī)試驗(yàn)E的每個(gè)可能的基本結(jié)果稱為樣本點(diǎn)，全體樣本點(diǎn)的集合稱為試驗(yàn)E的樣本空間。
新人教版高中英語必修3Unit 4 Space Exploration-Discovering Useful Structures導(dǎo)學(xué)案
【點(diǎn)津】 1.不定式的復(fù)合結(jié)構(gòu)作目的狀語 ,當(dāng)不定式或不定式短語有自己的執(zhí)行者時(shí)，要用不定式的復(fù)合結(jié)構(gòu)?即在不定式或不定式短語之前加 for ＋名詞或賓格代詞?作狀語。He opened the door for the children to come in. 他開門讓孩子們進(jìn)來。目的狀語從句與不定式的轉(zhuǎn)換 英語中的目的狀語從句，還可以變?yōu)椴欢ㄊ交虿欢ㄊ蕉陶Z作狀語，從而使句子在結(jié)構(gòu)上得以簡(jiǎn)化。可分為兩種情況： 1?當(dāng)目的狀語從句中的主語與主句中的主語相同時(shí)，可以直接簡(jiǎn)化為不定式或不定式短語作狀語。We'll start early in order that/so that we may arrive in time. →We'll start early in order to/so as to arrive in time. 2?當(dāng)目的狀語從句中的主語與主句中的主語不相同時(shí)，要用動(dòng)詞不定式的復(fù)合結(jié)構(gòu)作狀語。I came early in order that you might read my report before the meeting. →I came early in order for you to read my report before the meeting.
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(duì)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(shí)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(duì)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(diǎn)、學(xué)生的實(shí)際，我確定了如下教學(xué)目標(biāo)：【知識(shí)與能力目標(biāo)】1.理解文化創(chuàng)新的根本途徑和兩個(gè)基本途徑;2.了解文化創(chuàng)新過程中需要堅(jiān)持正確方向，克服錯(cuò)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(jì)（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(shí)例，總結(jié)出冪函數(shù)的概念，再借助圖像研究?jī)绾瘮?shù)的性質(zhì).課程目標(biāo)1、理解冪函數(shù)的概念，會(huì)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(gè)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(shí)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(yùn)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)大小；5.數(shù)學(xué)建模：在具體問題情境中，運(yùn)用數(shù)形結(jié)合思想，利用冪函數(shù)性質(zhì)、圖像特點(diǎn)解決實(shí)際問題。重點(diǎn)：常見冪函數(shù)的概念、圖象和性質(zhì)；難點(diǎn)：冪函數(shù)的單調(diào)性及比較兩個(gè)冪值的大小．
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(yàn)分享，故要用第一人稱來寫;時(shí)態(tài)以一股現(xiàn)在時(shí)為主。第二步：確定段落該類文章可以從以下三個(gè)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(huì)Para.3表示期望及感謝第三步：提煉要點(diǎn)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(jí)Wellness Bok上分享自己的親身經(jīng)歷及心得，請(qǐng)根據(jù)以下要點(diǎn)寫一篇80字左右的文章1. 你喜歡的運(yùn)動(dòng)是什么？2. 你最喜歡的原因是什么？3. 你參加鍛煉的體會(huì)。
新人教版高中英語必修2Unit 3 The Internet-Discovering Useful Structure教案二
This teaching period mainly deals with grammar “The Present Perfect Passive Voice.” To begin with, teachers should lead students to revise what they have learned about the Present Perfect Passive Voice. And then, teachers move on to stress more special cases concerning this grammar。This period carries considerable significance to the cultivation of students’ writing competence and lays a solid foundation for the basic appreciation of language beauty. The teacher is expected to enable students to master this period thoroughly and consolidate the knowledge by doing some exercises. 1. Guide students to review the basic usages of the Present Perfect Passive Voice2. Lead students to learn to use some special cases concerning the Present Perfect Passive Voice flexibly.2. Enable students to use the basic phrases structures flexibly.3. Strengthen students’ great interest in grammar learning.1. Help students to appreciate the function of the Present Perfect Passive Voice in a sentence2. Instruct students to write essays using the proper the Present Perfect Passive Voice.觀察下列句子特點(diǎn)，總結(jié)共同點(diǎn)。1．(教材P28)Much has been written about the wonders of the World Wide Web．2．(教材P28)But the Internet has done much more for people than simply make life more convenient．3．(教材P28)Many people have been helped by the club．4．(教材P28)She no longer feels lonely, and her company has become quite successful．5．(教材P32)Today I thought I’d blog about a question that has been asked many times—how do you stay safe online and avoid bad experiences on the Internet?
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 for Writing教案二
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。 Step 8 Writing---the articleHow to stay safe in the online chat roomToday I thought I’d blog about a question that has been asked many times--- how do you stay safe online and avoid bad experiences in the online chat room ? I’m not an expert, but many years as a blogger have taught me a thing or two.First of all, there’s the golden rule of the Internet: keep out of what makes you uneasy. Don’t post comments or click on anything. Second, protect your privacy. Don’t give out too much private information like your address, phone numbers, the ID numbers, etc. Third, be polite. If you are polite to others on the Internet, you won’t be attacked in normal situation. Finally, don’t believe in others easily and never meet someone you met online alone. It is very dangerous.Have you had any bad experiences online, or do you have some good advice for staying safe? Post your comments below!Step 9 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Does the writer tell the reader what he/she know about the topic ?2. Are the tips and suggestions well organised ?3. Has the writer defined the new words ?4. Does the author include examples, comparison, or explanations ?5. Does the writer end by asking readers to leave comments and/or suggestions ?6. Can you find any grammar or spelling mistakes.Step 6 HomeworkPut up your revised draft in the classroom or read it to your class.
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(gè)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(gè)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(hào)碼。 5. Identity theft is a common and serious problem. 身份盜竊是一個(gè)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(gè)假名, 這樣他們就可以留在一個(gè)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2Unit 3 The Internet-Discovering Useful Structure教案一
This unit is about the Internet, which has a great influence to our humans and our lives. During the Listening & Speaking & Talking and Reading and Thinking section, the influence in examples has been shown. Thus, use the Present Perfect Tense is appropriate. However, in order to show the justice or weaken the doer of the behavior/action, it’s better to use the Present Perfect Passive Voice than the Present Perfect Tense. Besides, having learned to use the Present Perfect Passive Voice, students can beautify their language in their writing. 1. Learn the structure of the Present Perfect Passive Voice and its functions. 2. Learn to change the sentences with the Present Perfect Passive Voice into the sentences with the Present Perfect Passive Voice. 3. Learn to write sentences with the Present Perfect Passive Voice flexibly according to the context. 1. Learn the structure of the Present Perfect Passive Voice and its functions. 2. Learn to change the sentences with the Present Perfect Passive Voice into the sentences with the Present Perfect Passive Voice. 3. Learn to write sentences with the Present Perfect Passive Voice flexibly according to the context. Step 1 Observe the following sentences, then change the sentences into passive voice.He has been selected to take part in the sports meeting．(肯定句)他已被挑選出來參加運(yùn)動(dòng)會(huì)。The ink has not been removed from his overcoat．(否定句)墨跡還沒有從他外套上去掉。
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.
《賣懶》教學(xué)設(shè)計(jì)教案
1.制作紅燈籠師：（展示漂亮的燈籠）小朋友們想不想自己親手制作一個(gè)呢？生：好呀師：那小朋友們知道制作燈籠需要什么材料嗎？生：彩紙、剪刀...師：沒錯(cuò)，那老師先來展示一下怎么制作燈籠吧?。ㄕ故就旰螅_始讓小朋友兩兩組合共同制作）2.制作燈籠剪紙師：小朋友們，剛剛是不是已經(jīng)制作燈籠了呀？下面我們進(jìn)行一個(gè)更好玩的環(huán)節(jié)？生：好呀好呀！師：那我先來展示一下咯，小朋友們別眨眼呀！（展示完后，開始讓小朋友們獨(dú)立完成）小結(jié)：通過制作共同合作制作燈籠與獨(dú)自完成燈籠剪影，不僅使他們更能感知燈籠的形狀，更能提高小朋友們的動(dòng)手能力和思考力。