-
【高教版】中職數(shù)學(xué)拓展模塊：2.1《橢圓》優(yōu)秀教學(xué)設(shè)計(jì)
本人所教的兩個(gè)班級學(xué)生普遍存在著數(shù)學(xué)科基礎(chǔ)知識較為薄弱，計(jì)算能力較差，綜合能力不強(qiáng)，對數(shù)學(xué)學(xué)習(xí)有一定的困難。在課堂上的主體作用的體現(xiàn)不是太充分，但是他們能意識到自己的不足，對數(shù)學(xué)課的學(xué)習(xí)興趣高，積極性強(qiáng)。 學(xué)生在學(xué)習(xí)交往上表現(xiàn)為個(gè)別化學(xué)習(xí)，課堂上較為依賴?yán)蠋煹囊龑?dǎo)。學(xué)生的群體性小組交流能力與協(xié)同討論學(xué)習(xí)的能力不強(qiáng)，對學(xué)習(xí)資源和知識信息的獲取、加工、處理和綜合的能力較低。在教學(xué)中盡量分析細(xì)致，減少跨度較大的環(huán)節(jié)，對重要的推導(dǎo)過程采用板書方式逐步進(jìn)行，力求讓絕大多數(shù)學(xué)生接受。 1.理解橢圓標(biāo)準(zhǔn)方程的推導(dǎo)；掌握橢圓的標(biāo)準(zhǔn)方程；會根據(jù)條件求橢圓的標(biāo)準(zhǔn)方程，會根據(jù)橢圓的標(biāo)準(zhǔn)方程求焦點(diǎn)坐標(biāo). 2.通過橢圓圖形的研究和標(biāo)準(zhǔn)方程的討論，使學(xué)生掌握橢圓的幾何性質(zhì)，能正確地畫出橢圓的圖形，并了解橢圓的一些實(shí)際應(yīng)用。 1.讓學(xué)生經(jīng)歷橢圓標(biāo)準(zhǔn)方程的推導(dǎo)過程，進(jìn)一步掌握求曲線方程的一般方法，體會數(shù)形結(jié)合等數(shù)學(xué)思想；培養(yǎng)學(xué)生運(yùn)用類比、聯(lián)想等方法提出問題. 2.培養(yǎng)學(xué)生運(yùn)用數(shù)形結(jié)合的思想，進(jìn)一步掌握利用方程研究曲線的基本方法，通過與橢圓幾何性質(zhì)的對比來提高學(xué)生聯(lián)想、類比、歸納的能力，解決一些實(shí)際問題。 1.通過具體的情境感知研究橢圓標(biāo)準(zhǔn)方程的必要性和實(shí)際意義；體會數(shù)學(xué)的對稱美、簡潔美，培養(yǎng)學(xué)生的審美情趣，形成學(xué)習(xí)數(shù)學(xué)知識的積極態(tài)度. 2.進(jìn)一步理解并掌握代數(shù)知識在解析幾何運(yùn)算中的作用，提高解方程組和計(jì)算能力，通過“數(shù)”研究“形”，說明“數(shù)”與“形”存在矛盾的統(tǒng)一體中，通過“數(shù)”的變化研究“形”的本質(zhì)。幫助學(xué)生建立勇于探索創(chuàng)新的精神和克服困難的信心。
人教A版高中數(shù)學(xué)必修一奇偶性教學(xué)設(shè)計(jì)（2）
《奇偶性》內(nèi)容選自人教版A版第一冊第三章第三節(jié)第二課時(shí);函數(shù)奇偶性是研究函數(shù)的一個(gè)重要策略,因此奇偶性成為函數(shù)的重要性質(zhì)之一,它的研究也為今后指對函數(shù)、冪函數(shù)、三角函數(shù)的性質(zhì)等后續(xù)內(nèi)容的深入起著鋪墊的作用.課程目標(biāo)1、理解函數(shù)的奇偶性及其幾何意義；2、學(xué)會運(yùn)用函數(shù)圖象理解和研究函數(shù)的性質(zhì)；3、學(xué)會判斷函數(shù)的奇偶性．?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)奇偶性；2.邏輯推理：證明函數(shù)奇偶性；3.數(shù)學(xué)運(yùn)算：運(yùn)用函數(shù)奇偶性求參數(shù)；4.數(shù)據(jù)分析：利用圖像求奇偶函數(shù)；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，利用奇偶性解決實(shí)際問題。重點(diǎn)：函數(shù)奇偶性概念的形成和函數(shù)奇偶性的判斷；難點(diǎn)：函數(shù)奇偶性概念的探究與理解．教學(xué)方法：以學(xué)生為主體，采用誘思探究式教學(xué)，精講多練。
新人教版高中英語必修3Unit 2 Morals and Virtues教學(xué)設(shè)計(jì)四
3.Teachers ask different groups to report the answers to the questions and ask them to try different sentence patterns.The teacher added some sentence patterns for students to refer to when writing.Step 4 Writing taskActivity 51.Write the first draft.Students first review the evaluation criteria in activity 5, and then independently complete the draft according to the outline of activity 4, the answers to the questions listed in the group discussion and report, and the reference sentence pattern.2.Change partners.The teacher guides the students to evaluate their partner's composition according to the checklist of activity 5 and proposes Suggestions for modification.3.Finalize the draft.Based on the peer evaluation, students revise their own compositions and determine the final draft.Finally, through group recommendation, the teacher selects excellent compositions for projection display or reading aloud in class, and gives comments and Suggestions.Step 5 Showing writingActivity 5T call some Ss to share their writing.Step 6 Homework1. Read the passage in this section to better understand the passage.2. Carefully understand the hierarchical structure of the article, and deeply understand the plot of the story according to the causes, process and results;3. Independently complete the relevant exercises in the guide plan.1、通過本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生是否理解和掌握閱讀文本中的新詞匯的意義與用法；2、通過本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否通過人物言行的對比分析道德故事的深層內(nèi)涵；3、通過本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否根據(jù)故事的起因、經(jīng)過和結(jié)果來深入理解故事的情節(jié)，從而了解文章的層次結(jié)構(gòu)；4、結(jié)合現(xiàn)實(shí)生活案例發(fā)表自己的見解和看法,寫一篇觀點(diǎn)明確、層次分明的故事評論。
新人教版高中英語必修3Unit 3 Diverse Cultures教學(xué)設(shè)計(jì)一
Activity 81.Grasp the main idea of the listening.Listen to the tape and answer the following questions:Who are the two speakers in the listening? What is their relationship?What is the main idea of the first part of the listening? How about the second part?2.Complete the passage.Ask the students to quickly review the summaries of the two listening materials in activity 2. Then play the recording for the second time.Ask them to complete the passage and fill in the blanks.3.Play the recording again and ask the students to use the structure diagram to comb the information structure in the listening.(While listening, take notes. Capture key information quickly and accurately.)Step 8 Talking Activity 91.Focus on the listening text.Listen to the students and listen to the tape. Let them understand the attitudes of Wu Yue and Justin in the conversation.How does Wu Yue feel about Chinese minority cultures?What does Justin think of the Miao and Dong cultures?How do you know that?2.learn functional items that express concerns.Ask students to focus on the expressions listed in activity. 3.And try to analyze the meaning they convey, including praise (Super!).Agree (Exactly!)"(You're kidding.!)Tell me more about it. Tell me more about it.For example, "Yeah Sure." "Definitely!" "Certainly!" "No kidding!" "No wonder!" and so on.4.Ask the students to have conversations in small groups, acting as Jsim and his friends.Justin shares his travels in Guizhou with friends and his thoughts;Justin's friends should give appropriate feedback, express their interest in relevant information, and ask for information when necessary.In order to enrich the dialogue, teachers can expand and supplement the introduction of Miao, dong, Lusheng and Dong Dage.After the group practice, the teacher can choose several groups of students to show, and let the rest of the students listen carefully, after listening to the best performance of the group, and give at least two reasons.
新人教版高中英語選修2Unit 4 Reading and thinking教學(xué)設(shè)計(jì)
【詞匯精講】highlight n.最好或最精彩的部分 vt.突出;強(qiáng)調(diào);使醒目One of the highlights of the trip was seeing the Taj Mahal.這次旅行的亮點(diǎn)之一是參觀泰姬陵。Your resume should highlight your skills and achievements.你的簡歷應(yīng)該突出你的技能和成就。The report highlights the major problems facing society today.報(bào)告強(qiáng)調(diào)了當(dāng)今社會所面臨的主要問題。I’ve highlighted the important passages in yellow.我用黃色標(biāo)出了重要段落。7.Edmonton is freezing cold in winter,with daily temperatures averaging -10 ℃.埃德蒙頓冬季寒冷,日平均氣溫為-10°C。【詞匯精講】freezing adj.極冷的;冰凍的Leave a basin of water outside in freezing weather.在冰凍的天氣里,放一盆水在室外。It’s freezing cold outside so wear a warm coat.外面超冷的,所以穿一個(gè)暖和一點(diǎn)的外套吧。8.It was not until 9:30 a.m.that they finally reached the capital of Ontario,Toronto.直到上午9時(shí)30分,他們才終于到達(dá)多倫多的首府安大略省?！揪涫狡饰觥勘揪涫且粋€(gè)強(qiáng)調(diào)句,強(qiáng)調(diào)的是句子的時(shí)間狀語until 9:30。含有not...until...的句子的強(qiáng)調(diào)句為It is not until...that...,that后面的句子要用肯定形式。It was not until then that I suddenly realized nobody was happier than I was.直到那時(shí)我才突然意識到?jīng)]有人比我更幸福了。
新人教版高中英語選修2Unit 5 Reading for writing教學(xué)設(shè)計(jì)
你校英語報(bào)計(jì)劃出版一期急救常識專刊,現(xiàn)面向全校學(xué)生公開征集稿件,你有意參加。請你根據(jù)下面提示內(nèi)容,用英語寫一篇短文,介紹在車禍現(xiàn)場對傷者進(jìn)行急救的方法和步驟。1.確?，F(xiàn)場的安全;2.詢問傷者,確保其呼吸正常;3.檢查傷口,如流血?jiǎng)t應(yīng)采取止血措施;4.如需急救,確保其處于康復(fù)位置。注意:1.詞數(shù)80左右;2.可以適當(dāng)增加細(xì)節(jié),以使行文連貫。參考詞匯:康復(fù)位置 recovery positionAs we all know, having a knowledge of first aid can make a great difference in our daily life. If a traffic accident happens and someone is injured, the following steps can be used to treat the injured.In the first place, we should make sure that the accident scene is safe so that we won’t get hurt. We should ask the injured person if he is OK, and see if he is breathing. What’s more, we should check for cuts and wounds. If he is bleeding badly, it is vital that we should try to stop the bleeding by applying pressure to the injury. This is because if a person loses too much blood, he may die. If necessary, take the injured person to the hospital as soon as possible.Do remember: when giving first aid, please be sure to place the person in a recovery position.
新人教版高中英語選修2Unit 3 Reading for writing教學(xué)設(shè)計(jì)
The theme of this part is to write an article about healthy diet. Through reading and writing activities, students can accumulate knowledge about healthy diet, deepen their understanding of the theme of healthy diet, and reflect on their own eating habits. This text describes the basic principles of healthy diet. The author uses data analysis, definition, comparison, examples and other methods. It also provides a demonstration of the use of conjunctions, which provides important information reference for students to complete the next collaborative task, writing skills, vivid language materials and expressions.1. Teach Ss to learn and skillfully use the new words learned from the text.2. Develop students’ ability to understand, extract and summarize information.3. Guide students to understand the theme of healthy diet and reflect on their own eating habits.4. To guide students to analyze and understand the reading discourse from the aspects of theme content, writing structure, language expression, etc., 5. Enable Ss to write in combination with relevant topics and opinions, and to talk about their eating habits.1. Guide students to analyze and understand the reading discourse from the aspects of theme content, writing structure, language expression, etc.2. Enable them to write in combination with relevant topics and opinions, and to talk about their eating habits.3. Guide the students to use the cohesive words correctly, strengthen the textual cohesion, and make the expression fluent and the thinking clear.Step1: Warming upbrainstorm some healthy eating habits.1.Eat slowly.2.Don’t eat too much fat or sugar.3.Eat healthy food.4.Have a balanced diet.Step2: Read the passage and then sum up the main idea of each paragraph.
新人教版高中英語選修2Unit 2 Using langauge-Listening教學(xué)設(shè)計(jì)
? B: Absolutely! Getting involved with Chinese cultural activities there definitely helped a lot. I got to practice my Chinese on a daily basis, and I could learn how native Chinese speakers spoke.? A: What do you feel is your biggest achievement?? B: Learning Chinese characters! I have learnt about 1,500 so far. When I first started, I didn't think it was even going to be possible to learn so many, but now I find that I can read signs, menus, and even some easy newspaper articles.? A: What are you most keen on?? B: I've really become keen on learning more about the Chinese culture, in particular Chinese calligraphy. As I have learnt Chinese characters, I have developed a great appreciation for their meaning. I want to explore Chinese characters by learning how to write them in a more beautiful way. ? A: Finally, what do you want to say to anyone interested in learning Chinese?? I have really become keen on learning more about the Chinese culture, in particular Chinese Calligraphy. As I have learnt Chinese character, I have developed a great appreciation for their meaning. I want to explore Chinese characters by learning how to write them in a more beautiful way.? A: Finally, what do you want to say to anyone interested in learning Chinese?? B: I'd say, give it a shot! While some aspects may be difficult, it is quite rewarding and you will be happy that you tried.? A: Thanks for your time. ? B:You're welcome.
新人教版高中英語選修2Unit 4 Reading for writing教學(xué)設(shè)計(jì)
假定你是英國的Jack，打算來中國旅行，請你給你的中國筆友李華寫一封信，要點(diǎn)如下：1．你的旅行計(jì)劃：北京→泰山→杭州；2．征求建議并詢問他是否愿意充當(dāng)你的導(dǎo)游。注意：1.詞數(shù)80左右(開頭和結(jié)尾已給出，不計(jì)入總詞數(shù))；2．可以適當(dāng)增加細(xì)節(jié)，以使行文連貫。參考詞匯：故宮 the Forbidden City；泰山 Mount TaiDear Li Hua，I'm glad to tell you that 'm going to visit China.First，I am planning to visit Beijing，the capitalof China，where I am looking forward to enjoying the Great Wall，the Forbidden City and somebeautiful parks.Then I intend to go to visit Mount Tai in Shandong Province.I've heard that it is one ofthe most famous mountains in China and I can't wait to enjoy the amazing sunrise there.After that，I amalso going to Hangzhou.It is said that it is a beautiful modern city with breathtaking natural sights，among which the West Lake is a well- known tourist attraction.What do you think of my travel plan? Will you act as my guide? Hope to hear from you soon.
新人教版高中英語選修2Unit 5 Learning about Language教學(xué)設(shè)計(jì)
The purpose of this section of vocabulary exercises is to consolidate the key words in the first part of the reading text, let the students write the words according to the English definition, and focus on the detection of the meaning and spelling of the new words. The teaching design includes use English definition to explain words, which is conducive to improving students' interest in vocabulary learning, cultivating their sense of English language and thinking in English, and making students willing to use this method to better grasp the meaning of words, expand their vocabulary, and improve their ability of vocabulary application. Besides, the design offers more context including sentences and short passage for students to practice words flexibly.1. Guide students to understand and consolidate the meaning and usage of the vocabulary in the context, 2. Guide the students to use the unit topic vocabulary in a richer context3. Let the students sort out and accumulate the accumulated vocabulary, establishes the semantic connection between the vocabulary,4. Enable students to understand and master the vocabulary more effectivelyGuiding the Ss to use unit topic words and the sentence patterns in a richer context.Step1: Read the passage about chemical burns and fill in the blanks with the correct forms of the words in the box.
人教A版高中數(shù)學(xué)必修一對數(shù)的運(yùn)算教學(xué)設(shè)計(jì)（2）
學(xué)生已經(jīng)學(xué)習(xí)了指數(shù)運(yùn)算性質(zhì)，有了這些知識作儲備，教科書通過利用指數(shù)運(yùn)算性質(zhì)，推導(dǎo)對數(shù)的運(yùn)算性質(zhì)，再學(xué)習(xí)利用對數(shù)的運(yùn)算性質(zhì)化簡求值。課程目標(biāo)1、通過具體實(shí)例引入，推導(dǎo)對數(shù)的運(yùn)算性質(zhì)；2、熟練掌握對數(shù)的運(yùn)算性質(zhì)，學(xué)會化簡，計(jì)算.數(shù)學(xué)學(xué)科素養(yǎng)1.數(shù)學(xué)抽象：對數(shù)的運(yùn)算性質(zhì)；2.邏輯推理：換底公式的推導(dǎo)；3.數(shù)學(xué)運(yùn)算：對數(shù)運(yùn)算性質(zhì)的應(yīng)用；4.數(shù)學(xué)建模：在熟悉的實(shí)際情景中，模仿學(xué)過的數(shù)學(xué)建模過程解決問題.重點(diǎn)：對數(shù)的運(yùn)算性質(zhì)，換底公式，對數(shù)恒等式及其應(yīng)用；難點(diǎn)：正確使用對數(shù)的運(yùn)算性質(zhì)和換底公式．教學(xué)方法：以學(xué)生為主體，采用誘思探究式教學(xué)，精講多練。教學(xué)工具：多媒體。一、 情景導(dǎo)入回顧指數(shù)性質(zhì)：(1)aras＝ar＋s(a＞0，r，s∈Q)．(2)(ar)s＝ (a＞0，r，s∈Q)．(3)(ab)r＝ (a＞0，b＞0，r∈Q)．那么對數(shù)有哪些性質(zhì)？如 要求：讓學(xué)生自由發(fā)言，教師不做判斷。而是引導(dǎo)學(xué)生進(jìn)一步觀察.研探.
人教A版高中數(shù)學(xué)必修一函數(shù)的概念教學(xué)設(shè)計(jì)（2）
函數(shù)在高中數(shù)學(xué)中占有很重要的比重，因而作為函數(shù)的第一節(jié)內(nèi)容，主要從三個(gè)實(shí)例出發(fā)，引出函數(shù)的概念.從而就函數(shù)概念的分析判斷函數(shù)，求定義域和函數(shù)值，再結(jié)合三要素判斷函數(shù)相等.課程目標(biāo)1.理解函數(shù)的定義、函數(shù)的定義域、值域及對應(yīng)法則。2.掌握判定函數(shù)和函數(shù)相等的方法。3.學(xué)會求函數(shù)的定義域與函數(shù)值。數(shù)學(xué)學(xué)科素養(yǎng)1.數(shù)學(xué)抽象：通過教材中四個(gè)實(shí)例總結(jié)函數(shù)定義；2.邏輯推理：相等函數(shù)的判斷；3.數(shù)學(xué)運(yùn)算：求函數(shù)定義域和求函數(shù)值；4.數(shù)據(jù)分析：運(yùn)用分離常數(shù)法和換元法求值域；5.數(shù)學(xué)建模：通過從實(shí)際問題中抽象概括出函數(shù)概念的活動，培養(yǎng)學(xué)生從“特殊到一般”的分析問題的能力，提高學(xué)生的抽象概括能力。重點(diǎn)：函數(shù)的概念，函數(shù)的三要素。難點(diǎn)：函數(shù)概念及符號y=f(x)的理解。
人教A版高中數(shù)學(xué)必修一任意角教學(xué)設(shè)計(jì)（2）
學(xué)生在初中學(xué)習(xí)了 ～ ，但是現(xiàn)實(shí)生活中隨處可見超出 ～ 范圍的角.例如體操中有“前空翻轉(zhuǎn)體 ”，且主動輪和被動輪的旋轉(zhuǎn)方向不一致.因此為了準(zhǔn)確描述這些現(xiàn)象，本節(jié)課主要就旋轉(zhuǎn)度數(shù)和旋轉(zhuǎn)方向?qū)堑母拍钸M(jìn)行推廣.課程目標(biāo)1.了解任意角的概念.2.理解象限角的概念及終邊相同的角的含義．3.掌握判斷象限角及表示終邊相同的角的方法．?dāng)?shù)學(xué)學(xué)科素養(yǎng)1.數(shù)學(xué)抽象：理解任意角的概念，能區(qū)分各類角；2.邏輯推理：求區(qū)域角；3.數(shù)學(xué)運(yùn)算：會判斷象限角及終邊相同的角.重點(diǎn)：理解象限角的概念及終邊相同的角的含義；難點(diǎn)：掌握判斷象限角及表示終邊相同的角的方法．教學(xué)方法：以學(xué)生為主體，采用誘思探究式教學(xué)，精講多練。教學(xué)工具：多媒體。一、 情景導(dǎo)入初中對角的定義是：射線OA繞端點(diǎn)O按逆時(shí)針方向旋轉(zhuǎn)一周回到起始位置，在這個(gè)過程中可以得到 ～ 范圍內(nèi)的角.但是現(xiàn)實(shí)生活中隨處可見超出 ～ 范圍的角.例如體操中有“前空翻轉(zhuǎn)體 ”，且主動輪和被動輪的旋轉(zhuǎn)方向不一致.
人教版高中數(shù)學(xué)選修3二項(xiàng)式定理教學(xué)設(shè)計(jì)
二項(xiàng)式定理形式上的特點(diǎn)(1)二項(xiàng)展開式有n+1項(xiàng),而不是n項(xiàng).(2)二項(xiàng)式系數(shù)都是C_n^k(k=0,1,2,…,n),它與二項(xiàng)展開式中某一項(xiàng)的系數(shù)不一定相等.(3)二項(xiàng)展開式中的二項(xiàng)式系數(shù)的和等于2n,即C_n^0+C_n^1+C_n^2+…+C_n^n=2n.(4)在排列方式上,按照字母a的降冪排列,從第一項(xiàng)起,次數(shù)由n次逐項(xiàng)減少1次直到0次,同時(shí)字母b按升冪排列,次數(shù)由0次逐項(xiàng)增加1次直到n次.1．判斷(正確的打“√”，錯(cuò)誤的打“×”)(1)(a＋b)n展開式中共有n項(xiàng)． ( )(2)在公式中，交換a，b的順序?qū)Ω黜?xiàng)沒有影響． ( )(3)Cknan－kbk是(a＋b)n展開式中的第k項(xiàng)． ( )(4)(a－b)n與(a＋b)n的二項(xiàng)式展開式的二項(xiàng)式系數(shù)相同． ( )[解析] (1)× 因?yàn)?a＋b)n展開式中共有n＋1項(xiàng)．(2)× 因?yàn)槎?xiàng)式的第k＋1項(xiàng)Cknan－kbk和(b＋a)n的展開式的第k＋1項(xiàng)Cknbn－kak是不同的，其中的a，b是不能隨便交換的．(3)× 因?yàn)镃knan－kbk是(a＋b)n展開式中的第k＋1項(xiàng)．(4)√ 因?yàn)?a－b)n與(a＋b)n的二項(xiàng)式展開式的二項(xiàng)式系數(shù)都是Crn.[答案] (1)× (2)× (3)× (4)√
人教版高中數(shù)學(xué)選修3全概率公式教學(xué)設(shè)計(jì)
2.某小組有20名射手，其中1，2，3，4級射手分別為2，6，9，3名.又若選1，2，3，4級射手參加比賽，則在比賽中射中目標(biāo)的概率分別為0.85，0.64，0.45，0.32，今隨機(jī)選一人參加比賽，則該小組比賽中射中目標(biāo)的概率為________. 【解析】設(shè)B表示“該小組比賽中射中目標(biāo)”，Ai(i=1，2，3，4)表示“選i級射手參加比賽”，則P(B)= P(Ai)P(B|Ai)= 2/20×0.85+ 6/20 ×0.64+ 9/20×0.45+ 3/20×0.32=0.527 5.答案：0.527 53.兩批相同的產(chǎn)品各有12件和10件，每批產(chǎn)品中各有1件廢品，現(xiàn)在先從第1批產(chǎn)品中任取1件放入第2批中，然后從第2批中任取1件，則取到廢品的概率為________. 【解析】設(shè)A表示“取到廢品”，B表示“從第1批中取到廢品”，有P(B)= 112，P(A|B)= 2/11 ，P(A| )= 1/11所以P(A)=P(B)P(A|B)+P( )P(A| )4．有一批同一型號的產(chǎn)品，已知其中由一廠生產(chǎn)的占 30%, 二廠生產(chǎn)的占 50% , 三廠生產(chǎn)的占 20%, 又知這三個(gè)廠的產(chǎn)品次品率分別為2% , 1%, 1%，問從這批產(chǎn)品中任取一件是次品的概率是多少？
平行線的性質(zhì)定理和判定定理教案教學(xué)設(shè)計(jì)
1、互逆命題：在兩個(gè)命題中，如果第一個(gè)命題的條件是第二個(gè)命題的 ，而第一個(gè)命題的結(jié)論是第二個(gè)命題的 ，那么這兩個(gè)命題互逆命題，如果把其中一個(gè)命題叫做原命題，那么另一個(gè)命題叫做它的 .2、互逆定理：如果一個(gè)定理的逆命題也是 ，那么這個(gè)逆命題就是原來定理的逆定理.注意(1)：逆命題、互逆命題不一定是真命題，但逆定理、互逆定理，一定是真命題.(2)：不是所有的定理都有逆定理.自主學(xué)習(xí)診斷：如圖所示：(1)若∠A= ，則AC∥ED，( ).(2)若∠EDB= ，則AC∥ED，( ).(3)若∠A+ =1800，則AB∥FD，( ).(4)若∠A+ =1800，則AC∥ED，( ).
初中語文常考常見的別詞、別字教案教學(xué)設(shè)計(jì)
1、三年的汗水，終于有了回報(bào)。站在領(lǐng)獎(jiǎng)臺上，她興奮得不能自己，淚水刷刷地流了下來。誤：不能自己 正：不能自已[bù néng zì yǐ] 2、燈光下面，人頭攢動。這條街上陳列的，其實(shí)大都是膺品，但還是熱鬧非凡。誤：膺品 正：贗品[yàn pǐn]3、待學(xué)生從農(nóng)村基地回來時(shí)，校舍已修茸一新，三幢大樓披上了節(jié)日的盛裝。誤：修茸 正：修葺[xiū qì] 4、埋伏在左側(cè)的三連，聽到?jīng)_鋒號響，尤如猛虎下山，直撲敵人陣地。誤：尤如猛虎下山 正：猶如猛虎下山[yóu rú] 5、粗制濫造，哄抬市價(jià)，這種竭澤而魚的做法，最后必然會讓自己受到懲罰。誤：竭澤而魚 正：竭澤而漁[jié zé ér yú] 6、自從鋼琴熱掀起后，鋼琴教師身價(jià)倍增，一批“三腳貓”也混跡其中，濫芋充數(shù)。誤：濫芋充數(shù) 正：濫竽充數(shù)[làn yú chōng shù] 7、陽光穿射而入，配著店堂排列得整整齊齊的書架，真是一個(gè)書香花香陽光普照的世外桃園。誤：世外桃園 正：世外桃源[shì wài táo yuán]8、在調(diào)查過程中，陳又將大批贓款轉(zhuǎn)移至岳父處，專案組找他談話時(shí)，他依舊裝得若無其事。誤：臟款 正：贓款[zāng kuǎn]
大班科學(xué)教案：常識活動設(shè)計(jì)：圓形的妙用
1．讓幼兒在認(rèn)識圓的基礎(chǔ)上，通過做做、玩玩，讓幼兒知道圓形的物體會滾動。2．知道用輪子能省力。3．發(fā)展幼兒的發(fā)散性思維?！净顒訙?zhǔn)備】1．室外：(1)裝有圓形輪胎的小三輪車、四輪車、小推車；(2)裝有除圓形以外的各種形狀輪胎的小三輪車、四輪車、小推車。2．室內(nèi)：各種形狀的小積木，幼兒人手一套；裝有書籍的箱子一只，圓形的輪子兩個(gè)，小推車一輛，大積木一塊，每組一只盒子(裝有橡皮泥、硬卡紙、彩色紙、剪刀、牙簽、膠水、蠟筆)。【活動過程】一、第一次嘗試：滾動圓形和其他形狀構(gòu)成的物體在室外供給幼兒裝有圓形輪胎的小三輪車、四輪車、小推車以及裝著除圓形以外的各種形狀輪胎的小三輪車、四輪車、小推車。教師：“這里有許多車子，我們一起來玩一玩、想一想，哪些車子的輪子會滾動?”二、第二次嘗試：圓形的東西會滾動1．在室內(nèi)供給每位幼兒各種形狀的積木玩。①你們的桌子上有什么形狀的積木?②請你推動各種積木，你發(fā)現(xiàn)了什么?③為什么圓形的積木輕輕一推會滾，而梯形、正方形、長方形、三角形等的積木不會滾動呢?小結(jié)：圓形的東西會滾動，因?yàn)樗鼪]有角。
幼兒園中班語言活動說課設(shè)計(jì)：會動的房子
二、說活動家目標(biāo)及重點(diǎn)難點(diǎn)1、理解故事情節(jié)，感受作品中清新的大自然畫面。2、感受象聲詞,用語言正確地描述生活與自然的各種聲音。3、豐富詞匯，發(fā)展幼兒的觀察力，思維能力和口語表達(dá)能力。本節(jié)課的重點(diǎn)是理解故事情節(jié)，難點(diǎn)是學(xué)習(xí)詞語“手舞足蹈、慚愧、馱?！比⒄f活動準(zhǔn)備1、課件制作2、場景布置：大樹底下、山腳下、大海邊、草原上。四、說教法：根據(jù)幼兒好奇、好問、好動、好模仿及具體形象思維占優(yōu)勢的特點(diǎn)，本次活動我主要采取以下幾種教法。1、啟發(fā)引導(dǎo)法：通過引導(dǎo)幼兒直觀的觀察，感知故事內(nèi)容，并用遞進(jìn)式的提問，幫助幼兒理解故事。2、創(chuàng)設(shè)多媒體情景直觀法：在活動中運(yùn)用多媒體教學(xué)，符合幼兒愛看動畫的特點(diǎn)。多媒體的聲音，清晰美麗的畫面，讓孩子直接感知，從而更好的理解故事。五、說學(xué)法1、學(xué)觀察：通過觀看課件，把幼兒帶入美麗、清新的大自然中，視覺與聽覺的結(jié)合，使幼兒理解故事中的意境，感知自然界中的各種聲響，調(diào)動幼兒的積極性，也激發(fā)了他們熱愛大自然，熱愛生活的情感。2、學(xué)思考：通過教師適當(dāng)?shù)靥釂?，激發(fā)孩子們想象、思考、感受，發(fā)展幼兒的想象力。六、說活動過程：本次活動由三個(gè)環(huán)節(jié)構(gòu)成，即“動――靜――動”，這拉，有利于突破重難點(diǎn)，我是這樣掌開教學(xué)思路的。1、激發(fā)興趣（第一環(huán)節(jié)）活動開始，教師扮演松鼠媽媽，幼兒扮小松鼠，在歡快的音樂聲中，“媽媽”帶著孩子們在草地上玩片刻后回到房子里休息，媽媽問：“孩子們，我們住的房子會動嗎？你見過會動的房子嗎？可是，有一只松鼠寶寶卻建造了一座會動的房子，這到底是怎么一回事呢？”我以這樣的形式導(dǎo)入，目的是激發(fā)幼兒興趣，帶著疑問聽故事。
大班數(shù)學(xué)活動設(shè)計(jì)《認(rèn)識時(shí)鐘》課件教案
2、發(fā)展幼兒的邏輯思維能力。3、教育孩子珍惜時(shí)間，養(yǎng)成按時(shí)作息的好習(xí)慣?；顒訙?zhǔn)備：1、幼兒人手一份硬紙片鐘。2、動物手偶3、實(shí)物鐘活動過程：一、引入并簡單認(rèn)識鐘及其作用。1、 引入并簡單認(rèn)識鐘的種類及其作用。教師調(diào)鬧鐘鬧鈴引入提問：⑴你們猜猜是什么聲音？（鬧鐘的鬧鈴）⑵家里還有哪些鐘？是什么形狀的？（有鬧鐘，手表，掛鐘和大座鐘）⑶鐘有什么作用？（鐘不停的走，告訴人們幾點(diǎn)了，人們就按照時(shí)鐘上的時(shí)間進(jìn)行學(xué)習(xí)休息）2、簡單認(rèn)識鐘面。教師：今天老師也帶來了一個(gè)鐘，看看它是什么形狀的？（圓形）請你仔細(xì)觀察鐘面上有什么？總結(jié)：有兩根針和12個(gè)數(shù)字。提問：⑴這兩根針有什么不同？（長度不同）教師：他們都有自己的名字，長的叫分針，短的叫時(shí)針。我們在看看數(shù)字，提問：⑵正上面的是數(shù)字多少？（12）⑶正下面的是數(shù)字多少？（6）二、由時(shí)針、分針賽跑，引導(dǎo)幼兒感知時(shí)針、分針的運(yùn)轉(zhuǎn)規(guī)律。教師：今天呀，時(shí)針和分針要進(jìn)行依次跑步比賽，現(xiàn)在他們都摘在數(shù)字12的起跑線上了。請你們猜猜誰回贏？好，比賽就要開始了，預(yù)備— 開始！（教師操作鐘表）提問：⑴誰跑的快？（分針）議論：分針和時(shí)針跑的時(shí)候，他們之間有什么秘密呢？教師反復(fù)操作。總結(jié)：分鐘走一圈，時(shí)鐘走一格，這就是一小時(shí)。