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北師大初中數(shù)學(xué)八年級上冊單個(gè)一次函數(shù)圖象的應(yīng)用1教案
方法總結(jié)：要認(rèn)真觀察圖象，結(jié)合題意，弄清各點(diǎn)所表示的意義．探究點(diǎn)二：一次函數(shù)與一元一次方程一次函數(shù)y＝kx＋b(k，b為常數(shù)，且k≠0)的圖象如圖所示，根據(jù)圖象信息可求得關(guān)于x的方程kx＋b＝0的解為()A．x＝－1B．x＝2C．x＝0D．x＝3解析：首先由函數(shù)經(jīng)過點(diǎn)(0，1)可得b＝1，再將點(diǎn)(2，3)代入y＝kx＋1，可求出k的值為1，從而可得出一次函數(shù)的表達(dá)式為y＝x＋1，再求出方程x＋1＝0的解為x＝－1，故選A.方法總結(jié)：此題主要考查了一次函數(shù)與一元一次方程的關(guān)系，關(guān)鍵是正確利用待定系數(shù)法求出一次函數(shù)的關(guān)系式．三、板書設(shè)計(jì)一次函數(shù)的應(yīng)用單個(gè)一次函數(shù)圖象的應(yīng)用一次函數(shù)與一元一次方程的關(guān)系探究的過程由淺入深，并利用了豐富的實(shí)際情景，增加了學(xué)生的學(xué)習(xí)興趣．教學(xué)中要注意層層遞進(jìn)，逐步讓學(xué)生掌握求一次函數(shù)與一元一次方程的關(guān)系．教學(xué)中還應(yīng)注意尊重學(xué)生的個(gè)體差異，使每個(gè)學(xué)生都學(xué)有所獲．
北師大初中數(shù)學(xué)八年級上冊兩個(gè)一次函數(shù)圖象的應(yīng)用1教案
解：∵y＝23x＋a與y＝－12x＋b的圖象都過點(diǎn)A(－4，0)，∴32×(－4)＋a＝0，－12×(－4)＋b＝0.∴a＝6，b＝－2.∴兩個(gè)一次函數(shù)分別是y＝32x＋6和y＝－12x－2.y＝32x＋6與y軸交于點(diǎn)B，則y＝32×0＋6＝6，∴B(0，6)；y＝－12x－2與y軸交于點(diǎn)C，則y＝－2，∴C(0，－2)．如圖所示，S△ABC＝12BC·AO＝12×4×(6＋2)＝16.方法總結(jié)：解此類題要先求得頂點(diǎn)的坐標(biāo)，即兩個(gè)一次函數(shù)的交點(diǎn)和它們分別與x軸、y軸交點(diǎn)的坐標(biāo)．三、板書設(shè)計(jì)兩個(gè)一次函數(shù)的應(yīng)用實(shí)際生活中的問題幾何問題進(jìn)一步訓(xùn)練學(xué)生的識圖能力，能通過函數(shù)圖象獲取信息，解決簡單的實(shí)際問題，在函數(shù)圖象信息獲取過程中，進(jìn)一步培養(yǎng)學(xué)生的數(shù)形結(jié)合意識，發(fā)展形象思維．在解決實(shí)際問題的過程中，進(jìn)一步發(fā)展學(xué)生的分析問題、解決問題的能力和數(shù)學(xué)應(yīng)用意識．
北師大初中數(shù)學(xué)八年級上冊二元一次方程與一次函數(shù)2教案
2. 在彈性限度內(nèi)，彈簧的長度y（厘米）是所掛物體質(zhì)量x（千克）的一次函數(shù)．當(dāng)所掛物體的質(zhì)量為1千克時(shí)彈簧長15厘米；當(dāng)所掛物體的質(zhì)量為3千克時(shí)，彈簧長16厘米．寫出y與x之間的函數(shù)關(guān)系式，并求當(dāng)所掛物體的質(zhì)量為4千克時(shí)彈簧的長度．答案： 當(dāng)x＝４是，y＝ 3. 教材例2的再探索：我邊防局接到情報(bào)，近海處有一可疑船只A正向公海方向行駛．邊防局迅速派出快艇B追趕，如圖所示， ， 分別表示兩船相對于海岸的距離s（海里）與追趕時(shí)間t（分）之間的關(guān)系．當(dāng)時(shí)間t等于多少分鐘時(shí)，我邊防快艇B能夠追趕上A。答案：直線 的解析式： ，直線 的解析式： 15分鐘第五環(huán)節(jié)課堂小結(jié)（2分鐘，教師引導(dǎo)學(xué)生總結(jié)）內(nèi)容：一、函數(shù)與方程之間的關(guān)系．二、在解決實(shí)際問題時(shí)從不同角度思考問題，就會得到不一樣的方法，從而拓展自己的思維．三、掌握利用二元一次方程組求一次函數(shù)表達(dá)式的一般步驟：1．用含字母的系數(shù)設(shè)出一次函數(shù)的表達(dá)式： ；2．將已知條件代入上述表達(dá)式中得k，b的二元一次方程組；3．解這個(gè)二元一次方程組得k，b，進(jìn)而得到一次函數(shù)的表達(dá)式.
利用計(jì)算器進(jìn)行有理數(shù)的計(jì)算教案教學(xué)設(shè)計(jì)
計(jì)算器的面板是由鍵盤和顯示器組成的。顯示器是用來顯示輸入的數(shù)據(jù)和計(jì)算結(jié)果的裝置。顯示器因計(jì)算器的種類不同而不同，有單行顯示的，也有雙行顯示的。在鍵盤的每個(gè)鍵上，都標(biāo)明了這個(gè)鍵的功能。我們看鍵盤上標(biāo)有的鍵，是開機(jī)鍵，在開始使用計(jì)算器時(shí)先要按一下這個(gè)鍵，以接通電源，計(jì)算器的電源一般用5號電池或鈕扣電池。再看鍵，是關(guān)機(jī)鍵，停止使用計(jì)算器時(shí)要按一下這個(gè)鍵，來切斷計(jì)算器的電源，是清除鍵，按一下這個(gè)鍵，計(jì)算器就清除當(dāng)前顯示的數(shù)與符號。的功能是完成運(yùn)算或執(zhí)行命令。是運(yùn)算鍵，按一下這個(gè)鍵，計(jì)算器就執(zhí)行加法運(yùn)算。
一元一次方程教案教學(xué)設(shè)計(jì)
1、方程的定義1)像這種用等號“=”來表示相等關(guān)系的式子，叫等式。(老師給出定義。）2)請大家觀察左邊的這些式子，看看它們有什么共同的特征？(老師提出問題。）3）列方程時(shí)，要先設(shè)字母表示未知數(shù)，然后根據(jù)問題中的相等關(guān)系，寫出含有未知數(shù)的等式叫做方程。（學(xué)生思考后，老師給出新學(xué)內(nèi)容方程的定義。）4）判斷方程的兩個(gè)關(guān)鍵要素： ①有未知數(shù) ②是等式（老師提問，并給出。）
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊：10.1《計(jì)數(shù)原理》教學(xué)設(shè)計(jì)
授課 日期 班級16高造價(jià) 課題： §10.1 計(jì)數(shù)原理 教學(xué)目的要求： 1.掌握分類計(jì)數(shù)原理與分步計(jì)數(shù)原理的概念和區(qū)別； 2.能利用兩個(gè)原理分析和解決一些簡單的應(yīng)用問題； 3.通過對一些應(yīng)用問題的分析，培養(yǎng)自己的歸納概括和邏輯判斷能力. 教學(xué)重點(diǎn)、難點(diǎn): 兩個(gè)原理的概念與區(qū)別 授課方法： 任務(wù)驅(qū)動(dòng)法 小組合作學(xué)習(xí)法 教學(xué)參考及教具（含多媒體教學(xué)設(shè)備）： 《單招教學(xué)大綱》、課件 授課執(zhí)行情況及分析： 板書設(shè)計(jì)或授課提綱 §10.1 計(jì)數(shù)原理 1、加法原理 2、乘法原理 3、兩個(gè)原理的區(qū)別
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊：6.3《等比數(shù)列》教學(xué)設(shè)計(jì)
課題序號6-3授課形式講授與練習(xí)課題名稱等比數(shù)列課時(shí)2教學(xué) 目標(biāo)知識 目標(biāo)理解并掌握等比數(shù)列的概念，掌握并能應(yīng)用等比數(shù)列的通項(xiàng)公式及前n項(xiàng)和公式。能力 目標(biāo)通過公式的推導(dǎo)和應(yīng)用，使學(xué)生體會從特殊到一般，再從一般到特殊的思維規(guī)律，初步形成認(rèn)識問題、分析問題、解決問題的一般思路和方法 。素質(zhì) 目標(biāo)通過對等比數(shù)列知識的學(xué)習(xí)，培養(yǎng)學(xué)生細(xì)心觀察、認(rèn)真分析、正確總結(jié)的科學(xué)思維習(xí)慣和嚴(yán)謹(jǐn)?shù)膶W(xué)習(xí)態(tài)度。教學(xué) 重點(diǎn)等比數(shù)列的概念及通項(xiàng)公式、前n項(xiàng)和公式的推導(dǎo)過程及運(yùn)用。教學(xué) 難點(diǎn)對等比數(shù)列的通項(xiàng)公式與求和公式變式運(yùn)用。教學(xué)內(nèi)容 調(diào)整無學(xué)生知識與 能力準(zhǔn)備數(shù)列的概念課后拓展 練習(xí) 習(xí)題（P.21）： 3，4．教學(xué) 反思 教研室 審核
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊：6.2《等差數(shù)列》教學(xué)設(shè)計(jì)
系（部）醫(yī)藥授課教師戚文擷授課班級11(5),11（6）班授課類型新授課授課時(shí)數(shù)2課時(shí)授課周數(shù)第一周授課日期2012.2.15授課地點(diǎn) 教室課題第六章數(shù)列分課題§6.2 等差數(shù)列教學(xué)目標(biāo)1. 理解等差數(shù)列的概念，掌握等差數(shù)列的通項(xiàng)公式；掌握等差中項(xiàng)的概念． 2. 逐步靈活應(yīng)用等差數(shù)列的概念和通項(xiàng)公式解決問題． 3.等差數(shù)列的前N項(xiàng)之和 ． 4．培養(yǎng)學(xué)生分析、比較、歸納的邏輯思維能力． ． 2． 3．教學(xué)重點(diǎn)等差數(shù)列的概念及其通項(xiàng)公式． 教學(xué)難點(diǎn)等差數(shù)列通項(xiàng)公式的靈活運(yùn)用． 教學(xué)方法情境教學(xué)法、自主探究式教學(xué)方法教學(xué)器材及設(shè)備黑板、粉筆復(fù)習(xí)提問提問內(nèi)容姓名成績1．?dāng)?shù)列的定義？ 答： 2. 數(shù)列的通項(xiàng)公式？ 答： 板書設(shè)計(jì) §6.2.1等差數(shù)列的概念 1． 1.等差數(shù)列的定義 公差：d 2.常數(shù)列 3．等差數(shù)列的通項(xiàng)公式 an＝a1＋(n－1)d． 等差數(shù)列的前n 項(xiàng)和公式： 例題 練習(xí)作業(yè)布置習(xí)題第1，2題．課后小結(jié)本節(jié)課主要采用自主探究式教學(xué)方法．充分利用現(xiàn)實(shí)情景，盡可能地增加教學(xué)過程的趣味性、實(shí)踐性．我再整個(gè)教學(xué)中強(qiáng)調(diào)學(xué)生的主動(dòng)參與，讓學(xué)生自己去分析、探索，在探索過程中研究和領(lǐng)悟得出的結(jié)論，從而達(dá)到使學(xué)生既獲得知識又發(fā)展智能的目的．
新人教版高中英語選修2Unit 2 Bridging Cultures-Discovering useful structures教學(xué)設(shè)計(jì)
The grammar of this unit is designed to review noun clauses. Sentences that use nouns in a sentence are called noun clauses. Nominal clauses can act as subject, object, predicate, appositive and other components in compound sentences. According to the above-mentioned different grammatical functions, nominal clauses are divided into subject clause, object clause, predicate clause and appositive clause. In this unit, we will review the three kinds of nominal clauses. Appositive clauses are not required to be mastered in the optional compulsory stage, so they are not involved.1. Guide the students to judge the compound sentences and determine the composition of the clauses in the sentence.2. Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.3. Inspire the students to systematize the function and usage of noun clause1.Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.2.Inspire the students to systematize the function and usage of noun clauseStep1: The teacher ask studetns to find out more nominal clauses from the reading passage and udnerline the nominal clauses.
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊：10.4《用樣本估計(jì)總體》教學(xué)設(shè)計(jì)
教 學(xué) 過 程教師 行為學(xué)生 行為教學(xué) 意圖時(shí)間 *揭示課題 10.4 用樣本估計(jì)總體 *創(chuàng)設(shè)情境 興趣導(dǎo)入 【知識回顧】 初中我們曾經(jīng)學(xué)習(xí)過頻數(shù)分布圖和頻數(shù)分布表，利用它們可以清楚地看到數(shù)據(jù)分布在各個(gè)組內(nèi)的個(gè)數(shù)． 【知識鞏固】 例1 某工廠從去年全年生產(chǎn)某種零件的日產(chǎn)記錄(件)中隨機(jī)抽取30份，得到以下數(shù)據(jù)： 346 345 347 357 349 352 341 345 358 350 354 344 346 342 345 358 348 345 346 357 350 345 352 349 346 356 351 355 352 348 列出頻率分布表． 解 分析樣本的數(shù)據(jù)．其最大值是358，最小值是341，它們的差是358－341=17．取組距為3，確定分點(diǎn)，將數(shù)據(jù)分為6組． 列出頻數(shù)分布表 【小提示】 設(shè)定分點(diǎn)數(shù)值時(shí)需要考慮分點(diǎn)值不要與樣本數(shù)據(jù)重合． 分 組頻 數(shù) 累 計(jì)頻 數(shù)340.5～343.5┬2343.5～346.5正 正10346.5～349.5正5349.5～352.5正 ￣6352.5～355.5┬2355.5～358.5正5合 計(jì)3030 介紹 質(zhì)疑 引領(lǐng) 分析 講解 說明 了解 觀察 思考 解答 啟發(fā) 學(xué)生思考 0 10*動(dòng)腦思考 探索新知 【新知識】 各組內(nèi)數(shù)據(jù)的個(gè)數(shù)，叫做該組的頻數(shù)．每組的頻數(shù)與全體數(shù)據(jù)的個(gè)數(shù)之比叫做該組的頻率． 計(jì)算上面頻數(shù)分布表中各組的頻率，得到頻率分布表如表10－8所示． 表10－8 分 組頻 數(shù)頻 率340.5～343.520.067343.5～346.5100.333346.5～349.550.167349.5～352.560.2352.5～355.520.067355.5～358.550.166合 計(jì)301.000 根據(jù)頻率分布表，可以畫出頻率分布直方圖（如圖10－4）． 圖10－4 頻率分布直方圖的橫軸表示數(shù)據(jù)分組情況，以組距為單位；縱軸表示頻率與組距之比．因此，某一組距的頻率數(shù)值上等于對應(yīng)矩形的面積． 【想一想】 各小矩形的面積之和應(yīng)該等于1．為什么呢？ 【新知識】 圖10－4顯示，日產(chǎn)量為344~346件的天數(shù)最多，其頻率等于該矩形的面積，即 ． 根據(jù)樣本的數(shù)據(jù)，可以推測，去年的生產(chǎn)這種零件情況：去年約有的天數(shù)日產(chǎn)量為344~346件． 頻率分布直方圖可以直觀地反映樣本數(shù)據(jù)的分布情況．由此可以推斷和估計(jì)總體中某事件發(fā)生的概率．樣本選擇得恰當(dāng)，這種估計(jì)是比較可信的． 如上所述，用樣本的頻率分布估計(jì)總體的步驟為： (1) 選擇恰當(dāng)?shù)某闃臃椒ǖ玫綐颖緮?shù)據(jù)； (2) 計(jì)算數(shù)據(jù)最大值和最小值、確定組距和組數(shù)，確定分點(diǎn)并列出頻率分布表； (3) 繪制頻率分布直方圖； (4) 觀察頻率分布表與頻率分布直方圖，根據(jù)樣本的頻率分布，估計(jì)總體中某事件發(fā)生的概率． 【軟件鏈接】 利用與教材配套的軟件（也可以使用其他軟件），可以方便的繪制樣本數(shù)據(jù)的頻率分布直方圖，如圖10－5所示． 圖10?5 講解 說明 引領(lǐng) 分析 仔細(xì) 分析 關(guān)鍵 語句 觀察 理解 記憶 帶領(lǐng) 學(xué)生 分析 25
新人教版高中英語選修2Unit 1 Science and Scientists-Learning about Language教學(xué)設(shè)計(jì)
Step 7: complete the discourse according to the grammar rules.Cholera used to be one of the most 1.__________ (fear) diseases in the world. In the early 19th century, _2_________ an outbreak of cholera hit Europe, millions of people died. But neither its cause, 3__________ its cure was understood. A British doctor, John Snow, wanted to solve the problem and he knew that cholera would not be controlled _4_________ its cause was found. In general, there were two contradictory theories 5 __________ explained how cholera spread. The first suggested that bad air caused the disease. The second was that cholera was caused by an _6_________(infect) from germs in food or water. John Snow thought that the second theory was correct but he needed proof. So when another outbreak of cholera hit London in 1854, he began to investigate. Later, with all the evidence he _7_________ (gather), John Snow was able to announce that the pump water carried cholera germs. Therefore, he had the handle of the pump _8_________ (remove) so that it couldn't be used. Through his intervention，the disease was stopped in its tracks. What is more, John Snow found that some companies sold water from the River Thames that __9__________________ (pollute) by raw waste. The people who drank this water were much more likely _10_________ (get) cholera than those who drank pure or boiled water. Through John Snow's efforts, the _11_________ (threaten) of cholera around the world saw a substantial increase. Keys： 1.feared 2.when 3. nor 4.unless 5.that/which 6.infection 7.had gathered 8.removed 9.was polluted 10.to get 11. threat
新人教版高中英語選修2Unit 3 Food and Culture-Reading and thinking教學(xué)設(shè)計(jì)
The discourse explores the link between food and culture from a foreign’s perspective and it records some authentic Chinese food and illustrates the cultural meaning, gerography features and historic tradition that the food reflects. It is aimed to lead students to understand and think about the connection between food and culture. While teaching, the teacher should instruct students to find out the writing order and the writer’s experieces and feelings towards Chinese food and culture.1.Guide the students to read the text, sort out the information and dig out the topic.2.Understand the cultural connotation, regional characteristics and historical tradition of Chinese cuisine3.Understand and explore the relationship between food and people's personality4.Guide the students to use the cohesive words in the text5.Lead students to accurately grasp the real meaning of the information and improve the overall understanding ability by understanding the implied meaning behind the text.1. Enable the Ss to understand the structure and the writing style of the passage well.2. Lead the Ss to understand and think further about the connection between food and geography and local character traits.Step1: Prediction before reading. Before you read, look at the title, and the picture. What do you think this article is about?keys:It is about various culture and cuisine about a place or some countries.
新人教版高中英語選修2Unit 5 First Aid-Discovering useful structures教學(xué)設(shè)計(jì)
You have no excuse for not going.你沒有理由不去。He was punished for not having finished his homework.他因未完成作業(yè)而受到懲罰。2．動(dòng)詞ing形式復(fù)合結(jié)構(gòu)由物主代詞或人稱代詞賓格、名詞所有格或普通格加動(dòng)詞ing，即“sb./sb.'s＋doing”構(gòu)成。動(dòng)詞ing形式的復(fù)合結(jié)構(gòu)實(shí)際上是給動(dòng)詞ing形式加了一個(gè)邏輯主語。動(dòng)詞ing形式的復(fù)合結(jié)構(gòu)有四種形式：①形容詞性物主代詞＋動(dòng)詞ing②名詞所有格＋動(dòng)詞ing③代詞賓格＋動(dòng)詞ing④名詞＋動(dòng)詞ingHer coming to help encouraged all of us.她來幫忙鼓舞了我們所有人。The baby was made awake by the door suddenly shutting.這個(gè)嬰兒被突然的關(guān)門聲吵醒了。Can you imagine him/Jack cooking at home?你能想象他/杰克在家做飯的樣子嗎？無生命名詞無論是作主語還是作賓語都不能用第②種形式。Tom's winning first prize last year impressed me a lot.湯姆去年得了一等獎(jiǎng)使我印象深刻。Do you mind my/me/Jack's/Jack leaving now?你介意我/杰克現(xiàn)在離開嗎？Excuse me for my not coming on time．很抱歉我沒能按時(shí)來。His father's being ill made him worried.他父親病了，他很擔(dān)心。We are looking forward to the singer's/the singer to give us a concert.我們盼望著這位歌手來給我們舉辦一場演唱會。
新人教版高中英語選修2Unit 1 Science and Scientists-Discovering useful structures教學(xué)設(shè)計(jì)
The grammatical structure of this unit is predicative clause. Like object clause and subject clause, predicative clause is one of Nominal Clauses. The leading words of predicative clauses are that, what, how, what, where, as if, because, etc.The design of teaching activities aims to guide students to perceive the structural features of predicative clauses and think about their ideographic functions. Beyond that, students should be guided to use this grammar in the context apporpriately and flexibly.1. Enable the Ss to master the usage of the predicative clauses in this unit.2. Enable the Ss to use the predicative patterns flexibly.3. Train the Ss to apply some skills by doing the relevant exercises.1.Guide students to perceive the structural features of predicative clauses and think about their ideographic functions.2.Strengthen students' ability of using predicative clauses in context, but also cultivate their ability of text analysis and logical reasoning competence.Step1: Underline all the examples in the reading passage, where noun clauses are used as the predicative. Then state their meaning and functions.1) One theory was that bad air caused the disease.2) Another theory was that cholera was caused by an infection from germs in food or water.3) The truth was that the water from the Broad Street had been infected by waste.Sum up the rules of grammar:1. 以上黑體部分在句中作表語。2. 句1、2、3中的that在從句中不作成分，只起連接作用。 Step2: Review the basic components of predicative clauses1.Definition
新人教版高中英語選修2Unit 1 Science and Scientists-Reading and thinking教學(xué)設(shè)計(jì)
Step 5： After learning the text, discuss with your peers about the following questions:1.John Snow believed Idea 2 was right. How did he finally prove it?2. Do you think John Snow would have solved this problem without the map?3. Cholera is a 19th century disease. What disease do you think is similar to cholera today?SARS and Covid-19 because they are both deadly and fatally infectious, have an unknown cause and need serious public health care to solve them urgently.keys:1. John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.2. No. The map helped John Snow organize his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.3. SARS and Covid-19 because they are both deadly and fatally infectious, have an unknown cause and need serious public health care to solve them urgently.Step 6: Consolidate what you have learned by filling in the blanks:John Snow was a well-known _1___ in London in the _2__ century. He wanted to find the _3_____ of cholera in order to help people ___4_____ it. In 1854 when a cholera __5__ London, he began to gather information. He ___6__ on a map ___7___ all the dead people had lived and he found that many people who had ___8____ (drink) the dirty water from the __9____ died. So he decided that the polluted water ___10____ cholera. He suggested that the ___11__ of all water supplies should be _12______ and new methods of dealing with ____13___ water be found. Finally, “King Cholera” was __14_____.Keys: 1. doctor 2. 19th 3.cause 4.infected with 5.hit 6.marked 7.where 8.drunk 9.pump 10.carried 11.source 12.examined 13.polluted 14.defeatedHomework: Retell the text after class and preview its language points
新人教版高中英語選修2Unit 1 Science and Scientists-Using langauge教學(xué)設(shè)計(jì)
This happens because the dish soap molecules have a strong negative charge, and the milk molecules have a strong positive charge. Like magnets, these molecules are attracted to each other, and so they appear to move around on the plate, taking the food coloring with them, making it look like the colors are quickly moving to escape from the soap.Listening text:? Judy: Oh, I'm so sorry that you were ill and couldn't come with us on our field trip. How are you feeling now? Better?? Bill: Much better, thanks. But how was it?? Judy: Wonderful! I especially liked an area of the museum called Light Games.it was really cool. They had a hall of mirrors where I could see myself reflected thousands of times!? Bill: A hall of mirrors can be a lot of fun. What else did they have?? Judy: Well, they had an experiment where we looked at a blue screen for a while, and then suddenly we could see tiny bright lights moving around on it. You'll never guess what those bright lights were!? Bill: Come on, tell me!? Judy: They were our own blood cells. For some reason, our eyes play tricks on us when we look at a blue screen, and we can see our own blood cells moving around like little lights! But there was another thing I liked better. I stood in front of a white light, and it cast different shadows of me in every color of the rainbow!? Bill: Oh, I wish I had been there. Tell me more!? Judy: Well, they had another area for sound. They had a giant piano keyboard that you could use your feet to play. But then, instead of playing the sounds of a piano, it played the voices of classical singers! Then they had a giant dish, and when you spoke into it, it reflected the sound back and made it louder. You could use it to speak in a whisper to someone 17 meters away.? Bill: It all sounds so cool. I wish I could have gone with you? Judy: I know, but we can go together this weekend. I'd love to go there again!? Bill: That sounds like a great idea!
新人教版高中英語選修2Unit 3 Food and Culture-Discovering useful structures教學(xué)設(shè)計(jì)
The newspaper reported more than 100 people had been killed in the thunderstorm.報(bào)紙報(bào)道說有一百多人在暴風(fēng)雨中喪生。(2)before、when、by the time、until、after、once等引導(dǎo)的時(shí)間狀語從句的謂語是一般過去時(shí)，以及by、before后面接過去的時(shí)間時(shí)，主句動(dòng)作發(fā)生在從句的動(dòng)作或過去的時(shí)間之前且表示被動(dòng)時(shí)，要用過去完成時(shí)的被動(dòng)語態(tài)。By the time my brother was 10, he had been sent to Italy.我弟弟10歲前就已經(jīng)被送到意大利了。Tons of rice had been produced by the end of last month. 到上月底已生產(chǎn)了好幾噸大米。(3) It was the first/second/last ... time that ...句中that引導(dǎo)的定語從句中，主語與謂語構(gòu)成被動(dòng)關(guān)系時(shí)，要用過去完成時(shí)的被動(dòng)語態(tài)。It was the first time that I had seen the night fact to face in one and a half years. 這是我一年半以來第一次親眼目睹夜晚的景色。(4)在虛擬語氣中，條件句表示與過去事實(shí)相反，且主語與謂語構(gòu)成被動(dòng)關(guān)系時(shí)，要用過去完成時(shí)的被動(dòng)語態(tài)。If I had been instructed by him earlier, I would have finished the task.如果我早一點(diǎn)得到他的指示，我早就完成這項(xiàng)任務(wù)了。If I had hurried, I wouldn't have missed the train.如果我快點(diǎn)的話，我就不會誤了火車。If you had been at the party, you would have met him. 如果你去了晚會，你就會見到他的。
高教版中職數(shù)學(xué)基礎(chǔ)模塊下冊：9.5《柱、錐、球及其簡單組合體》教學(xué)設(shè)計(jì)
課題序號 授課班級 授課課時(shí)2授課形式 教學(xué)方法 授課章節(jié) 名稱9.5柱、錐、球及其組合體使用教具 教學(xué)目的1、使學(xué)生認(rèn)識柱、錐、球及其組合體的結(jié)構(gòu)特征，并能運(yùn)用這些特征描述生活中簡單物體的結(jié)構(gòu)。 2、讓學(xué)生了解柱、錐、球的側(cè)面積和體積的計(jì)算公式。 3、培養(yǎng)學(xué)生觀察能力、計(jì)算能力。
【高教版】中職數(shù)學(xué)拓展模塊：3.1《排列與組合》優(yōu)秀教學(xué)設(shè)計(jì)
教 學(xué) 過 程教師 行為學(xué)生 行為教學(xué) 意圖時(shí)間 *揭示課題 3．1 排列與組合． *創(chuàng)設(shè)情境 興趣導(dǎo)入 基礎(chǔ)模塊中，曾經(jīng)學(xué)習(xí)了兩個(gè)計(jì)數(shù)原理．大家知道： （1）如果完成一件事，有N類方式.第一類方式有k1種方法，第二類方式有k2種方法，……，第n類方式有kn種方法，那么完成這件事的方法共有 = + +…+（種）． （3.1） （2）如果完成一件事，需要分成N個(gè)步驟．完成第1個(gè)步驟有k1種方法，完成第2個(gè)步驟有k2種方法，……，完成第n個(gè)步驟有kn種方法，并且只有這n個(gè)步驟都完成后，這件事才能完成，那么完成這件事的方法共有 = · ·…·（種）． （3.2） 下面看一個(gè)問題： 在北京、重慶、上海3個(gè)民航站之間的直達(dá)航線，需要準(zhǔn)備多少種不同的機(jī)票？ 這個(gè)問題就是從北京、重慶、上海3個(gè)民航站中，每次取出2個(gè)站，按照起點(diǎn)在前，終點(diǎn)在后的順序排列，求不同的排列方法的總數(shù). 首先確定機(jī)票的起點(diǎn)，從3個(gè)民航站中任意選取1個(gè)，有3種不同的方法；然后確定機(jī)票的終點(diǎn)，從剩余的2個(gè)民航站中任意選取1個(gè)，有2種不同的方法．根據(jù)分步計(jì)數(shù)原理，共有3×2=6種不同的方法，即需要準(zhǔn)備6種不同的飛機(jī)票： 北京→重慶，北京→上海，重慶→北京，重慶→上海，上?！本?，上?！貞c. 介紹 播放 課件 質(zhì)疑 了解 觀看 課件 思考 引導(dǎo) 啟發(fā)學(xué)生得出結(jié)果 0 15*動(dòng)腦思考 探索新知 我們將被取的對象（如上面問題中的民航站）叫做元素，上面的問題就是：從3個(gè)不同元素中，任取2個(gè)，按照一定的順序排成一列，可以得到多少種不同的排列. 一般地，從n個(gè)不同元素中，任取m (m≤n)個(gè)元素，按照一定的順序排成一列，叫做從n個(gè)不同元素中取出m個(gè)元素的一個(gè)排列，時(shí)叫做選排列，時(shí)叫做全排列. 總結(jié) 歸納 分析 關(guān)鍵 詞語 思考 理解 記憶 引導(dǎo)學(xué)生發(fā)現(xiàn)解決問題方法 20
【高教版】中職數(shù)學(xué)拓展模塊：3.2《二項(xiàng)式定理》教學(xué)設(shè)計(jì)
一、定義： ，這一公式表示的定理叫做二項(xiàng)式定理，其中公式右邊的多項(xiàng)式叫做的二項(xiàng)展開式；上述二項(xiàng)展開式中各項(xiàng)的系數(shù) 叫做二項(xiàng)式系數(shù)，第項(xiàng)叫做二項(xiàng)展開式的通項(xiàng)，用表示；叫做二項(xiàng)展開式的通項(xiàng)公式．二、二項(xiàng)展開式的特點(diǎn)與功能1. 二項(xiàng)展開式的特點(diǎn)項(xiàng)數(shù)：二項(xiàng)展開式共（二項(xiàng)式的指數(shù)+1）項(xiàng)；指數(shù)：二項(xiàng)展開式各項(xiàng)的第一字母依次降冪（其冪指數(shù)等于相應(yīng)二項(xiàng)式系數(shù)的下標(biāo)與上標(biāo)的差），第二字母依次升冪（其冪指數(shù)等于二項(xiàng)式系數(shù)的上標(biāo)），并且每一項(xiàng)中兩個(gè)字母的系數(shù)之和均等于二項(xiàng)式的指數(shù)；系數(shù)：各項(xiàng)的二項(xiàng)式系數(shù)下標(biāo)等于二項(xiàng)式指數(shù)；上標(biāo)等于該項(xiàng)的項(xiàng)數(shù)減去1（或等于第二字母的冪指數(shù)；2. 二項(xiàng)展開式的功能注意到二項(xiàng)展開式的各項(xiàng)均含有不同的組合數(shù)，若賦予a，b不同的取值，則二項(xiàng)式展開式演變成一個(gè)組合恒等式．因此，揭示二項(xiàng)式定理的恒等式為組合恒等式的“母函數(shù)”，它是解決組合多項(xiàng)式問題的原始依據(jù)．又注意到在的二項(xiàng)展開式中，若將各項(xiàng)中組合數(shù)以外的因子視為這一組合數(shù)的系數(shù)，則易見展開式中各組合數(shù)的系數(shù)依次成等比數(shù)列．因此，解決組合數(shù)的系數(shù)依次成等比數(shù)列的求值或證明問題，二項(xiàng)式公式也是不可或缺的理論依據(jù)．