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抛物线的简单几何性质（2）教学设计人教A版高中数学选择性必修第一册
二、直线与抛物线的位置关系设直线l:y=kx+m,抛物线:y2=2px(p>0),将直线方程与抛物线方程联立整理成关于x的方程k2x2+2(km-p)x+m2=0.(1)若k≠0,当Δ>0时,直线与抛物线相交,有两个交点;当Δ=0时,直线与抛物线相切,有一个切点;当Δ<0时,直线与抛物线相离,没有公共点.(2)若k=0,直线与抛物线有一个交点,此时直线平行于抛物线的对称轴或与对称轴重合.因此直线与抛物线有一个公共点是直线与抛物线相切的必要不充分条件.二、典例解析例5.过抛物线焦点F的直线交抛物线于A、B两点，通过点A和抛物线顶点的直线交抛物线的准线于点D，求证：直线DB平行于抛物线的对称轴．【分析】设抛物线的标准方程为：y2＝2px（p＞0）．设A（x1，y1），B（x2，y2）．直线OA的方程为： ＝ ＝ ，可得yD＝ ．设直线AB的方程为：my＝x﹣ ，与抛物线的方程联立化为y2﹣2pm﹣p2＝0，
新人教版高中英语必修3Unit 1 Festivals and Celebrations教学设计二
1. Ss look at the picture and scan the passage to understand the main idea while teacher is giving the following questions to inspire Ss to think.*Where are those people?*What are they doing?*Why are they so excited?2. Ss complete the passage with the appropriate -ing form. Then discuss and check the answers with class.Answers: boring, interesting, taking, exciting, amazing3. The teacher raises questions for the students to discuss and encourages them to express their opinions.*Do you like La Tomatina? Why or why not?4. Each group representative reports the discussion result, the teacher gives feedback and the evaluation.Step 6 PracticeActivity 41. Ss complete the Ex 2 in Using structures.2. Check the answers after finishing the exercises.①The dragon boat races are the most exciting part of the Dragon Boat Festival.② The children were excited to go Easter egg hunting.③What an amazing performance! This is the best music festival I have ever been to.④We were amazed by her funny-looking hat.⑤His inspiring speech at the conference won the admiration/ favour of the audience.⑥This is a challenging game to test your memory and observation capabilities. 3. T asks Ss to finish Ex 3 and 4 in Using structures by themselves, then check the answers with class.Step 6 Homework1. Understand and master the functions and usage of the -ing form;2. Finish the other exercises in Using structures.1、通过本节内容学习，学生是否理解和掌握动词-ing形式作定语和表语的功能和意义；2、通过本节内容学习，学生能否在理解文段内容的基础上，根据上下文语境和表达逻辑，能正确运用动词-ing形式描述节日庆典。3、通过本节内容学习，学生是否归纳和积累用于表达情绪的相关词汇。
新人教版高中英语必修3Unit 2 Morals and Virtues教学设计二
Activity 41. Students complete the task of activity 4, then teachers and students check the answers. 2. The teacher organized the students to work together and asked them to use the tables and mind maps sorted out before to retold the important choices in Lin Qiaozhi's life and their resultsStep 5 Language points1. The teacher asks the students to read the text carefully, find out the core words and long and difficult sentences in the text and draw lines, understand the use of vocabulary, and analyze the structure of long and difficult sentences. 2. The teacher explains and summarizes the usage of core vocabulary and asks the students to take notes. 3. The teacher analyzes and explains the long and difficult sentences that the students don't understand, so that the students can understand them better. Step 6 Homework1. Read the text again, in-depth understanding of the text; 2. Master the use of core vocabulary and understand the long and difficult sentences. 3. Complete relevant exercises in the guide plan. 1、通过本节内容学习，学生是否理解和掌握阅读文本中的新词汇的意义与用法；2、通过本节内容学习，学生能否结合文本特点总结林巧稚的人生原则和人格品质特征；3、通过本节内容学习，学生能否针对人生抉择发表自己的看法；能否全面地、客观地、理性地看待问题，进而对道德和人性有更加深入的思考和理解。
新人教版高中英语必修3Unit 1 Festivals and Celebrations教学设计三
*wide range of origins(= a great number of different origins, many kinds of origins)*It featured a parade and a great feast with music, dancing, and sports. (=A parade and a great feast with music, dancing, and sports were included as important parts of the Egyptian harvest festival.)*.. some traditions may fade away and others may be established.(= Some traditions may disappear gradually, while other new traditions may come into being.）Step 6 Practice(1) Listen and follow the tape.The teacher may remind the students to pay attention to the meaning and usage of the black words in the context, so as to prepare for the completion of the blanks in activity 5 and vocabulary exercises in the exercise book.(2) Students complete the text of activity 5 by themselves.The teacher needs to remind the students to fill in the blanks with the correct form of the vocabulary they have learned in the text.Students exchange their answers with their partners, and then teachers and students check their answers.(3)Finish the Ex in Activity 5 of students’ book.Step 7 Homework1. Read the text again, in-depth understanding of the text;2. Discuss the origin of festivals, the historical changes of related customs, the influence of commercial society on festivals and the connotation and essential meaning of festivals.3. Complete relevant exercises in the guide plan.1、通过本节内容学习，学生是否理解和掌握阅读文本中的新词汇的意义与用法；2、通过本节内容学习，学生能否结合文本特点快速而准确地找到主题句；3、通过本节内容学习，学生能否理清论说文的语篇结构和文本逻辑，了解节日风俗发展与变迁，感悟节日的内涵与意义。
新人教版高中英语必修3Unit 2 Morals and Virtues教学设计三
The joke set her crying.这个玩笑使她哭起来。Step 5 ReadingActivity 31. Students read the small text in activity 3. The teacher provides several small questions to check whether students understand the content of the text and the ideographic function of the -ing form in the text.*Where are those people?*Why did Dr Bethune come to China?*How did he help the Chinese people during the war?*What did Chairman Mao Zedong say about him?2. Ss try to rewrite some sentences using the -ing form. Then check the answers. When checking the answers, the teacher can ask different students to read the rewritten sentences and give comments.Answers:1. he became very interested in medicine, deciding to become a doctor.2. …after hearing that many people were dying in the war.3. Helping to organise hospitals, he taught doctors and nurses, and showed people how to give first aid./ He helped to organise hospitals, teaching doctors and nurses, and showing people how to give first aid.4. …praising Dr Bethune as a hero to be remembered in China.Step 6 PracticeActivity 4Students complete grammar activities 2 and 3 on page 69 of the workbook.Step 6 Homework1. Understand and master the functions and usage of the -ing form;2. Finish the other exercises in Using structures.1、通过本节内容学习，学生是否理解和掌握动词-ing形式作宾语补足语语和状语语的功能和意义；2、通过本节内容学习，学生能否正确使用动词-ing形式描述人物的行为、动作及其经历；3、通过本节内容学习，学生能否独立完成练习册和导学案中的相关练习。
新人教版高中英语必修3Unit 2 Morals and Virtues教学设计四
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、通过本节内容学习，学生是否理解和掌握阅读文本中的新词汇的意义与用法；2、通过本节内容学习，学生能否通过人物言行的对比分析道德故事的深层内涵；3、通过本节内容学习，学生能否根据故事的起因、经过和结果来深入理解故事的情节，从而了解文章的层次结构；4、结合现实生活案例发表自己的见解和看法,写一篇观点明确、层次分明的故事评论。
新人教版高中英语必修3Unit 3 Diverse Cultures教学设计三
The price is the same as(the price was)before the war.价格与战前相同。(4)定语从句中的“关系代词＋助动词be”可以省略。The ticket(that/which was)booked by his sister has been sent to him.他妹妹订的那张票已送到了他那里。Step 5 PracticeActivity 3(1) Guide students to complete the four activities in the Using Structures part of exercise book, in which activities 1 and 2 focus on ellipsis in dialogue answers, activity 3 focus on signs and headlines, two typical situations where ellipsis is used, and activity 4 focus on ellipsis in diary, an informal style.(2) Combine the examples in the above activities, ask students to summarize the omitted situations in groups, and make their own summary into a poster, and post it on the class wall after class to share with the class.(This step should give full play to the subjectivity of students, and teachers should encourage students to conclude different ellipsis phenomena according to their own understanding, they can conclude according to the different parts omitted in the sentence.)Step 6 Homework1. Understand and master the usages of ellipsis;2. Finish the other exercises in Using structures of Workbook.1、通过本节内容学习，学生是否理解和掌握省略的用法；2、通过本节内容学习，学生能否根据上下文语境或情景恢复句子中省略的成分，体会使用省略的效果；3、通过本节内容学习，学生能否独立完成练习册和导学案中的相关练习。
新人教版高中英语必修3Unit 3 Diverse Cultures教学设计二
(2)Consolidate key vocabulary.Ask the students to complete the exercises of activity 6 by themselves. Then ask them to check the answers with their partners.(The first language:Damage of the 1906 San Francisco earthquake and fire.A second language: Yunnan - one of the most diverse provinces in China).Step 5 Language points1. The teacher asks the students to read the text carefully, find out the more words and long and difficult sentences in the text and draw lines, understand the use of vocabulary, and analyze the structure of long and difficult sentences.2. The teacher explains and summarizes the usage of core vocabulary and asks the students to take notes.3. The teacher analyzes and explains the long and difficult sentences that the students don't understand, so that the students can understand them better.Step 6 Homework1. Read the text again, in-depth understanding of the text;2. Master the use of core vocabulary and understand the long and difficult sentences.3. Complete relevant exercises in the guide plan.1、通过本节内容学习，学生是否理解和掌握阅读文本中的新词汇的意义与用法；2、通过本节内容学习，学生能否结合文本特点了解文章的结构和作者的写作逻辑；3、通过本节内容学习，学生能否了解旧金山的城市风貌、文化特色，以及加利福尼亚州的历史，体会多元文化对美国的影响。
新人教版高中英语必修3Unit 3 Diverse Cultures教学设计四
该板块的活动主题是“介绍一个有显著文化特征的地方”( Describe a place with distinctive cultural identity)。该板块通过介绍中国城继续聚焦中国文化。本单元主题图呈现的是旧金山中国城的典型景象, Reading and Thinking部分也提到中国城,为该板块作铺垫。介绍中国城的目的主要是体现中国文化与美国多元文化的关系,它是美国多元文化的重要组成部分。中国城也是海外华人的精神家园和传播中国文化的重要窗口,外国人在中国城能近距离体验中国文化。1. Read the text to understand the cultural characteristics of Chinatown in San Francisco and the relationship between Chinese culture and American multiculturalism;2. Through reading, learn to comb the main information of the article, understand the author's writing purpose and writing characteristics;3. Learn to give a comprehensive, accurate, and organized description of the city or town you live in;Learn to revise and evaluate your writing.Importance:1. Guide the students to read the introduction of Chinatown in San Francisco and grasp its writing characteristics;2. Guide students to introduce their city or town in a comprehensive, accurate and organized way;3. Learn to comb the main information of the article, understand the author's writing purpose, and master the core vocabulary.
人教版高中历史必修1甲午中日战争说课稿
3．甲午中日战争中国战败的原因 对于“中国战败的原因”这一难点的突破，主要通过设置问题“中国之败败在实力逊于日本吗？”通过幻灯片全方位分析其实中国的综合国力当时是强于日本的。并且在战前，日本毫无取胜的把握。让学生结合刚学习过的战争原因和经过进行讨论，从多方面分析中国战败的原因。经过讨论，学生可以得出以下结论：避战自保方针，没有积极备战，将领临阵脱逃，教师肯定并总结答案进行补充。中日对比：中国士兵出身农民，军事训练落后，散兵游勇；日本士兵出身武士，训练有素；中国将领大多临阵脱逃，并相互猜忌，受当时恶劣的官风影响；李鸿章深知北洋海军实情，缺乏军费，军备废弛。为政治资本奉行避战自保政策，慈禧太后挪用海军军费过寿，支持李鸿章。使中方处于被动的局面，一再贻误战机。而日本在天皇的带动下，全民备战，做了充分的战争准备。
人教版高中语文必修1《再别康桥》说课稿2篇
一、教材分析1、教学对象分析《再别康桥》的教学对象是高一学生，高一学生往往对那种纯粹的、原始的、本真的情感体会较为肤浅，《再别康桥》是新月派诗人徐志摩的传世之作，有极高美学价值，它所抒发的离愁别绪是人类共同的情感经历，通过诵读容易将学生带人诗境，唤醒他们沉寂的真情，从而引起强烈的共鸣。 2、教材地位及作用 高中语文第一册第一单元为诗歌单元，本单元收录了中国现当代的一些优秀诗篇。《再别康桥》安排在本单元的第二课，属于必读课。虽然本诗向来众说纷纭，但其艺术之美人所共知，培养学生高尚的审美情趣和良好的审美创造力是语文学科的任务，因此，从语言赏析入手，从情感体验切入，就可以让学生通过学习本课体会现代诗歌的特点，多方面感受体悟诗歌的情感，受到美的熏陶。
人教版高中语文必修1《包身工》说课稿2篇
（一）解题：包身工──旧社会一种变相的贩卖奴隶的形式。被贩卖的多是女孩子由承办人送到工厂做工，无人身自由，所得工资全部归承办人所有，在这种形式下做工的人也称包身工。包身工是指二三十年代（时间），在上海东洋纱厂里（地点），为外国人工作的女工（工作性质）。因为这些女工在进厂时已经签订了卖身契，失去了人身的自由权，所以被称为“包身工”。标题中的“包身”二字，突出了帝国主义、封建势力对中国女童工的残酷剥削的罪行，控诉了他们的野蛮残暴的统治手段，以激起人们的义愤和同情，这是全文的中心思想。（二）关于报告文学：《包身工》属于报告文学。(同类题材有初中的《地质之光》、《谁是最可爱的人》)报告文学，是文学体裁的一种，散文的一类，是文艺通讯、速写、特写的总称，是文学创作中的“轻骑兵”。
人教版高中语文必修2《涉江采芙蓉》说课稿2篇
一、说教材1．教材分析《涉江采芙蓉》是新人教版必修二第二单元《古诗三首》中的一首。《古诗十九首》在中国古代诗歌的艺术手法上起着承前启后的作用，在高中语文古诗教学中也起着承前启后的作用。这首古体诗不论是艺术上，还是在思想上都已经达到了十分纯熟的境界。因此，它十分重要。2.说学情这首诗歌在内容上难度不大，可以做多角度解读。新课程标准鼓励学生作个性化解读，我们可以引导学生就此作些探讨。学生通过小学、初中的系统学习和本册古诗部分的集中学习，有了一定的古诗鉴赏能力，对源远流长的中华文化也有了一些积淀，兴趣渐浓，这是进一步引导学生热爱古代诗歌、学习古代诗歌的一个前提。3.教学目标依据学生特点，教材特色以及新课标的要求，制定教学目标如下：（用多媒体展示）1、了解关于《古诗十九首》的文学常识;2、感受诗歌的思想内涵;3、运用想象描摹诗歌的艺术画面。
人教版高中语文必修1《小狗包弟》说课稿
探究、讨论、交流：1、包弟讨人喜欢，作者却不得不将它送走，为什么？2、送走包弟后，作者为什么先是感觉轻松，随后觉得沉重？3、“您的小狗怎样？”这句话反复出现，有什么用意？4、“整整十三年零五个月过去了”“整整”一词有什么作用？5、“满园的创伤使我的心仿佛又给放在油锅里熬煎”这句话如何理解？6、“我怀念包弟，我想向它表示歉意。”如何理解？学生各抒己见后教师结合材料发表看法明确总结特别是最后一个问题得出作者这发之心底的语言，不仅仅是歉意，更是发自灵魂深处的忏悔！是对生命的尊重，是一个有良知的作家对反省历史的呼号。第三环节“认识你自己”——忏悔意识与我引导学生正视和反省成长过程中曾犯下过错。并布置课后作业：要求学生课后在本周随笔中谈反省忏悔后的感受。
人教版高中语文必修2《赤壁赋》说课稿3篇
[教学反思]人教版高中语文必修二第三单元安排了《兰亭集序》《赤壁赋》《游褒禅山记》三篇古代山水游记散文，它们借游赏之事，探索生命的意义、治学的道理。师者，所以传道、授业、解惑也。高中的教材选用的都是历史经典名篇，每一篇都闪烁着儒道释等百家光辉的思想。编者要老师传道的意图很明显。即非如此，看着这些影响历代、影响世界的如日月之耀眼光华的伟大思想就躺在我们的教科书里，又如何能不讲呢？所以，我将本课的教学重难点拟定为：帮助学生建立积极的生死观，掌握多角度看问题的正确的思想方法。当然，也让学生领会了融写景、抒情、说理于一炉的大家手法。整堂课各教学环节，环环相扣，过渡自然，读、思、议、写训练到位，而且全部围绕“生死观”展开，如一篇形散神不散的散文。
人教版高中语文必修2《短歌行》说课稿2篇
一、说教材《短歌行》是普通高中课程标准实验教科书必修（二）第二单元的一篇略读课文，本单元安排的是先秦到南北朝时期的诗歌。《短歌行》是著名政治家、军事家、文学家曹操的作品。诗中抓住“忧”字来写诗人为什么“忧”，如何解“忧”，从而表达希望能够招揽人才、完成统一天下的雄心壮志。所以本单元安排《短歌行》一诗，对学生全面了解曹操，感受曹操在短暂的人生中竭力创造伟业的气概。二、说学生我这一课的教学对象是高一学生。他们进入高中学习的时间只有三个多月，现在已经完成了必修（一）的学习。学习了现代诗歌单元，有了一定的诗歌学习基础，初步掌握了读诗的基本方法，但是还未能形成成熟的稳定的学习方式。同时，本单元学习是高中第一次接触古代诗歌，诗歌语言上的障碍和时间上的跨度对他们来说都是学习上的困难。因此教师要引导学生自主学习，合作学习，为他们设置新的学习情境，提供合作探究的机会。
人教版高中语文必修3《马嵬（其二）》说课稿
生2：颔联的意思是只听到禁卫军中传来夜间巡逻的梆子声，不再向宫中那样安逸地听到有鸡人打鸣报时的声音了。生3：颈联的意思是说事变发生那天军队发生哗变停留不前，但当年唐玄宗以为自己可以和贵妃天天在一起，对天上的牵牛和织女一年一度的会见还加以嘲笑呢。生4：尾联的含义是为什么唐玄宗当了四十五年的皇帝，还不如普通百姓夫妻恩爱，长相厮守。师：好的。请大家再齐读一遍诗文，做到人人都能疏通诗的含义。学生再次齐读。第三环节：专项探究师：白居易曾说：“文章合为时而著，歌诗合为事而作。”这首诗就是作者途经马嵬驿，咏马嵬之变这一历史事件而作，所以我们鉴赏的第三步，就是通过标题和诗文，弄清诗中的历史事件。请同学们找出诗中哪些诗句描述了这一事件？
人教版高中语文必修3《杜甫诗三首》说课稿
我以以《登高》为例，引导学生进行意象分析，感悟意境美。古人云“立象以尽意”“古诗之妙，专求意象”意象是诗人情感的载体，是诗歌的灵魂。引导学生张开联想和想象的翅膀去感受，去体验是意象，诗歌鉴赏的关键。科林伍德说“真正艺术的作品，不是看见的，也不是听到的，而是想象中的某种东西。”诗人通过想象创造出诗的形象，我们读者通过想象丰富地再现诗人创造的形象。而感受体验则是以全部身心投入作品，心灵与心灵相沟通，感情与感情相交流，对诗人的想象活动进行再经历和再体验。因此，在引导意象解读中，我先让学生点击这一个，就是通过抓修饰词、依据感情基调、展开想象具体分析本诗中每个意象的情感意蕴和审美意蕴，使学生明白意象在每首诗中的独特性。
人教版高中语文必修3《寡人之于国也》说课稿2篇
（明确：“寡人之于国也，尽心焉耳矣”，但“寡人之民不加多，何也？”）②他认为自己对国家政务尽心尽力了，他有哪些具体做法？（明确：移民移粟）③第2—4节中孟子是怎样说明梁惠王移民移粟的措施与“邻国之政”并无本质区别的？（明确：孟子不直接回答“民不加多”的问题，而是用梁惠王熟悉的“战”设喻——设圈套，诱使对方在不知不觉中说出“不可，直不百步耳，是亦走也。”）④孟子认为怎样才能做到“王道之始”？要想“王道之成”还需采取哪些措施？（明确：“不违农时，谷不可胜食也。数罟不入氵夸池，鱼鳖不可胜食也。斧斤以时入山林，材木不可胜用也。谷与鱼鳖不可胜食，材木不可胜用五亩之宅，树之以桑，五十者可以衣帛矣。鸡豚狗彘之畜，无失其时，七十者可以食肉矣。百亩之田，勿夺其时，数口之家，可以无饥矣。谨库序之教，申之以孝涕之义，颁白者不负戴于道路矣。）这一小步的目的是想让学生通过这些问题的解答，可以进一步理清思路，掌握文的大概内容。
人教版高中语文必修3《老人与海》说课稿2篇
3、重要语句的理解“可是一个人并不是生来要给打败的，你尽可把它消灭掉，可就是打不败他。”解析：这是老人第一次回合之后的内心独白，也是此小说的核心精神，充分体现了老人桑地亚哥的生命理念。整句话可以分为两部分来理解，前句告诉我们，人生活在自然与社会当中，必不可少要面临一些坎坷、磨难，这些磨难、坎坷完全可以造成躯体的消灭、消亡，这是人生命的脆弱性。后句，面对挫折，只要保持一种乐观的精神，拥有一颗坚强的心灵，那么，人类执着奋斗的精神将永不磨灭。4、象征主义题目是《老人与海》，而表明上，小说是写一位老人及其在海上的经历，但实际上，老人的形象极具概括性，他已经超越了一个人的存在，而成为了人生的一种象征。老人桑地亚哥就是“硬汉子”的代表，大海则是生命旅途的象征，鲨鱼则是我们行走中的“强物”，厄运的象征。人的一生不可能一帆风顺，不经历风雨，怎能见彩虹，走在人生路途中，不可避免我们都要遇到挫折，被厄运所阻挠，只有经历与“鲨鱼”的较量，才能成为强者，唱出最美的歌。
