北师大高一英语必修3课件

篇3：高一英语必修3unit1课件

高一英语必修3unit1课件

一、词汇过关

starve

【考纲释义】 vt.& vi. 使饿死;饿得要死

The proud man said he would starve rather than beg for food. 那个骄傲的人说他宁愿挨饿也不愿讨饭。

They starved the enemy into surrendering. 他们使敌人饿得投降了。

The homeless children were starved of love. 这些无家可归的孩子渴望得到爱。

【知识拓展】starve 表“感觉很饿”时,可用于进行时态。starve for sth.(= long for sth) 渴望获得某事物 starve to death 饿死

2. gain

【考纲释义】 vt. 获得;得到

He has gained rich experience in these years. 这些年来,他取得了丰富的经验。

The best way to learn is to put what we gain from books into practice. 最好的学习方法就是把我们从书本中获得的知识投入到实践中去。

【知识拓展】 gain 还可表示“赚得;挣得”,尤指因某种服务、劳动或工作而获得的。如:No pains no gains. 不劳无获。

3. gather

【考纲释义】 vt., vi. & n. 集合;聚集;搜集

A crowd gathered to see what had happened. 一群人聚拢起来看发生了什么事。

It was autumn, the time for Crusoe to gather his small harvest of corn. 秋天到了,是克鲁索收割他那一小块玉米的时候了。

For many Americans, Thanksgiving is the only time when all members of a family gather. The holiday is a time of family reunion. 对许多美国人来说,感恩节这一天是所有家庭成员欢聚一堂的难得时光。这个节日是家人团聚的时刻。

【知识拓展】 gather与collect辨析:gather 表示把分散的东西集中到一起,不仅可用于人和物,还可用于把抽象的东西,如力量、印象等聚集起来,也指采花、摘果、采蜜等;collect 则指精心地、仔细选择相似或有联系的东西,来变成有组织的整体的一部分。

4. award

【考纲释义】 n. 奖;奖品vt. 授予;判定

The Olympic winner received a gold medal as an award.奥林匹克的优胜者获得一枚金质奖章作为奖赏。

She has been awarded a scholarship to study at Harvard. 她获得了去哈佛大学读书的奖学金。

They awarded Mr. Brown the gold medal for his fine vegetables at the show. 因其优质的蔬菜展览,他们颁发给布朗先生金牌。

The court awarded custody of the child to the mother. 法院判定孩子的监护权给那位母亲。

【知识拓展】 award 用作可数名词时,指“奖品,奖金,奖赏”,侧重按法律与规定而给予的荣誉。用作及物动词时,常有下列搭配:award sb. sth. (for sth.)“(因)颁发给某人……”,be awarded sth. (for)“(因) 被授予……”。reward 可用作名词或动词,它的意思特指“报答,报偿,酬谢,奖赏”,重点在于对好行为或者功绩的报答、酬谢。常有下列搭配:receive sth. as a reward“因某事而获得奖赏”,reward sb. for“因……而酬谢 / 奖赏某人”;prize 也意为“奖品,奖金”,但它主要用于表示“获得几等奖”或“获奖金额”,特指在竞争、竞赛中获奖,常说win a prize for“因……而获……奖”。

5. apologize

【考纲释义】 vt. 道歉;辩白

I’m not speaking to you until you apologize. 我不会跟你说话,直到你向我道歉为止。

Harry apologized to his teacher for coming to school late. 哈利为上学迟到而向老师道歉。

I must apologize for myself. 我必须为自己辩白。

【知识拓展】 常用句型:apologize to sb.向某人道歉 apologize for sth. / doing sth.因(做了)某事而道歉apologize to sb. for sth. /doing sth. 因某事而向某人道歉

名词apology的相关搭配:make / offer an apology 道歉accept(refuse)an apology接受(拒绝)道歉

二、短语诠释

1. take place发生

Great changes have taken place since 1976. 1976年以来发生了巨大的变化。

In 1919, the May 4th Movement took place in China.19,中国发生了五四运动。

【知识拓展】 happen“偶然发生”,指一切客观事物或情况的偶然或未能预见地发生,主语为“事”,相当于不及物动词,没有被动语态;happen to do意为“碰巧”;take place相当于不及物动词,没有被动语态,指事先计划或预想到的事情的发生;break out 仅用于负面场合,多指灾难、战争、疾病等现象的突然发生,同样也没有被动语态;come about属于中性词语。既可用于表达正面事物的发生,又可用于表达负面事物的发生。

2. dress up (in)(使) 盛装;(使)打扮;装饰

We are supposed to dress up as movie characters for the party, what a novel idea! 我们在晚会上要装扮得像电影中的角色,这是一个多么新奇的主意啊!

We dressed up for the school ball on Christmas day. 我们为参加学校的圣诞舞会而盛装打扮。

She dress up in Elizabethan costume for the fancy?鄄dress ball. 她穿上伊丽莎白的服装去参加化妆舞会。

【知识拓展】 dress sb.给某人穿衣;dress oneself 给自己穿衣服;dress in 穿什么衣服

be dressed(in)表示穿着状况

3. play a trick (on sb.) / play tricks (on sb.) 捉弄某人;开某人玩笑

If the neighbours do not give any sweets, the children might play a trick on them. 如果邻居什么糖也不给,那么孩子们就可以捉弄他们了。

It is acceptable to play tricks on your friends on April 1st. 4月1日那天,同朋友们开玩笑是可以接受的。

【知识拓展】 play a joke on sb.戏弄某人 have a joke with sb.与某人说笑话 make a joke about sb. or sth.拿某人或某事说笑话 laugh at sb. 嘲笑某人 make fun of sb.取笑某人

4. look forward to 盼望;期待

We look forward to the return of spring. 我们期待着春天的到来。

People look forward to seeing more excellent players play basketball abroad. 人们期望看到更多的优秀球员到国外去打篮球。

【知识拓展】 以look为中心的一些短语: look after 照料look out 注意;当心 look up 查到;抬头看 look over 翻阅;浏览 look into 调查look up to 仰慕;尊敬 look down upon轻视;看不起

5. keep one’s word 守信用;履行诺言

Once you give someone a promise, you should make it no matter what will happen. This is what is called keep one’s word. 一旦你给了别人承诺,无论发生什么事,你都得实现它,这个就叫“守诺言”。

He always keeps his word. 他一直守信用。

【知识拓展】与word 有关的一些短语: eat one’s words 认错;收回前言并道歉have a word with sb. 与某人谈话have words with sb. 和某人吵架in other words换句话说 in a word 简而言之,概括地说 word for word 逐词地;原原本本地

三、句式详解

1. In India there is a national festival on October 2 to honour Mahatma Gandhi, the leader who helped gain India’s independence. 在印度,十月二日是一个全国性的节日,该节日就是纪念帮助他们获得了印度独立的领袖甘地的。

句中关系代词who引导的定语从句修饰Mahatma Gandhi的同位语the leader。同位语指的是句子中指代同一事物的词语、短语或从句,它和其前的名词构成同位关系。例如:

Mr Li, my English teacher, will be leaving on Tuesday, October 1. 李先生,我的英语老师,将于星期二,即10月1日离开。(My English teacher是Mr Li的同位语)

In this chapter we shall make use of only two of Newton’s laws, the first and the third. 本章我们将只使用牛顿的`两个定律:第一定律和第三定律。(the first and the third为two of Newton’s laws的同位语)

同位语可以由名词从句担当。同位语从句中的that并不是从句结构中的一个成分,而是一个连接词,只起连接作用,无具体词义,但一般不能省略。例如:

The idea that computers can recognize human voices surprises many people. 计算机能够识别人的声音的想法使许多人感到惊奇。

The news that I have passed the exam is true.我通过了考试这一消息是真的。

2. The country is covered with cherry tree flowers so that it looks as though it might be covered with pink snow. 乡村掩映在樱桃花里,它看起来仿佛被粉红色的雪所覆盖。

as though意为“似乎;好像”,在句中引导表语从句。在通常情况下,as though所引导的从句的谓语动词多用虚拟语气,表示所叙述的情况与事实相反。例如:

Why is she looking at me as though she knew me?她为什么那样看着我?像是认识我似的。

He stood there looking at the train and laughing, as though to miss a train was the best joke in the world.他站在那里,望着火车哈哈大笑,好像误了火车是天底下最开心的事儿似的。

so that既可引导目的状语从句,也可引导结果状语从句,可以由以下几点进行区分:

1) 当表达“为了……”、“以便……”的含义时,引导的是目的状语从句;当表达“以至于……”、“因此”的含义时,引导的是结果状语从句。如:

If you do know, answer in a loud enough voice so that all the class may hear. 如果你的确知道,应大声回答,以便让全班同学都可以听见。

It rained hard the day before yesterday, so that she had to stay at home. 前天雨下得很大,因此她只好呆在家里。

2) 当从句的谓语动词有情态动词can, could, may, might, should等时,是目的状语从句;当从句里没有情态动词,且谓语动词是一般现在时、一般过去时或现在完成时等时态时,引导的是结果状语从句。如:

We stopped at Salt Lake City so that we could visit the monument to seagulls. 我们在盐湖城逗留是为了可以参观为海鸥修的纪念碑。

They have walked a long distance so that they are all tired. 他们走了很长的路,所以都很累。

3) 当so that之前有逗号时,引导的是结果状语从句;反之,引导的是目的状语从句。如:

You didn’t plan your revision well, so that you didn’t pass the exam. 你没有好好地按计划复习,结果你没考及格。

The teacher must speak slowly so that the students may understand him. 那位老师必须讲得慢些,以便所有的学生可以理解。

篇4：高一英语必修二unit3课件

一、Teaching Aims  教学目标

Teaching contains

From page 33-35

1.Target language语言目标

a.      重点词汇和短语

period, advise…on, continue, fee, fare, gold, be worried about, out of work, stage, vote, position, accept, violence, as a matter of fact, blow up, put in prison, equal, make + O + adj, imagine, in one way, blankets, degree, allow sb to do, guard, stop from, educated, come to power, beg for, terror, fear, cruelty, reward, rights, be proud to do.

b.      重点句子

It was in 1952 and he had opened a black law firm to advise poor black people on their problems. P34

After trying hard, I got a job in a gold mine. P34

He told me how to get the correct papers so I could in Johannesburg. P34

2.Ability goals    能力目标

Talk about great people

Express your points of view

Use the Attributive Clause with prep. Or the Relative Adverbs: Where, when, and why

Learn to write a passage about a great person.

3.Learning ability goals     学能目标

Improve the Ss’ abilities of listening and speaking.

Enable the Ss to understand the important events completely.

Enable the Ss to get a good mastery of some words and expressions.

Enable the Ss to learn about the expressions of some famous people

Enable the students to learn how to talk about the famous great people.

二、. Teaching important points  教学重点

Understand the real meaning of the hero / heroine

Who is your hero / heroine ?

Why do you like him / her so much ?

三、Teaching difficult points  教学难点

The Attributive Clause ( 2 ) --- where, when, why.

Use the Attributive Clause with prep. Or the Relative Adverbs: Where, when, and why

Learn to write a passage about a great person.

四、Teaching methods       教学方法

Fast reading and careful reading

Asking and answering activity to check the student’s understanding of the text.

Individual, pair or group work to finish each other

Discussion

五、Teaching aids           教具准备

Slide projector, Tape-recorder, computer

六、Teaching procedures and ways  教学过程

Step 1 Revision

Go over what has been learned in the last period.

Who do you admire greatly?  Yao ming  Luxun  Newton

Step 2 Background about some characters

William Tyndale

William Tyndale ( 1484-1536 ) was a 16th century priest and scholar who translated the Bible into an early form of Modern English. Although numerous partial and complete English translations had been made from the 7th century onward, Tyndale’s was the first to take advantage of the new medium of print, which allowed for its wide distribution. Beside translating the Bible, he also held and published views which were considered heretical, first by the Catholic Church, and later by the Church of England which was established by Henry VIII. Because his Bible translation also include notes and commentary promoting these views. His translation was banned by the authorities, and he himself was burned at the stake in 1536, at the instigation of agents of Henry VIII and the Anglican Church .

Gandhi

Gandhi ( Oct,2 1869- Jan, 30, 1948 ) was one of the founding fathers of the modern Indian state and an influential advocate of pacifism as a means of revolution. He helped bring about India’s independence from British rule, inspiring other colonial peoples to work for their own independence and ultimately dismantle the British Empire and replace it with the Commonwealth .His principle of satyagraha , often roughly translated as “ way of truth ”, has inspired generations of democratic anti-racist activities including Martin Luther King , Jr and Nelson Mandela . He often stated his values were simple: truth and non –violence.

Neil Alden Armstrong

Neil Alden Armstrong ( Aug, 5  1930 ) is an American pilot , astronaut, and the first person to walk on the moon .He was born in Wapakoneta , Ohio and served in the Korean War as a jet fighter pilot for the US. Navy. He attended Purdue University, where he was a member of a fraternity, Phi Delta Theta , and received a Bachelor of Science degree in 1955. The he became a civilian test pilot for NASA and piloted the 4000 mi/h X-15 rocket plane. From 1960 to 1962 he was a pilot involved in the cancelled U.S During the actual mission, he took manual control of the Lunar Module Eagle and piloted it away from a rocky area to a safe landing. Several hours later he climbed out of the LM and became the first person to flub line on the moon, with the words “That’s one small step for a man, one giant leap for mankind.”

Abraham Lincoln

President Abraham Lincoln, the sixteenth president of the United States (1861- 1865 )

Albert Einstein

Albert Einstein is one of the greatest scientists of the century in the world. He was born in Germany. His theory in physics helped the world to know more about the universe. So he was given the Noble Prize in 1921. However , in 1930s , because of Hitler’s rule, he was forced to leave his homeland and go to the U.S.A. He lived the rest of his life there and died in 1955, at the age of 76.

Marie Curie

Marie Curie ( 1867- 1934 ) , Polish scientist , ws born in Warsaw , on Nov 7th , 1867 , and died in France, on 4th July 1934. She graduated in Mathematics and Physical Science and got married in 1895 with the French physicist , Pierre Curie. During her work , the Curie couple discovered a new radioactive element named polonium in honor to Marie’s homeland . Together with Becquerel, she obtained the Noble Prize for Physics in 1903. She founded the Radium Institute of Paris , and was the main responsible until her death. In 1911 she was awarded the Noble Prize for Chemistry.

Sun Yatwen

Sun Yatwen ( Sun Yixian , Sun Zhongshan , SunWen  1866- 1925 ) is considered the founding father of modern China. Born in a peasant family . He was accorded the appellant of “ pioneer of the revolution ”

Qian  Xuesen

He is widely considered as the “ father of the Chinese space program ”. As one of the leading rocket engineers at the California Institute of Technology. In the 1990s , he , who had worked on top-secret projects all his life, become one of the most well – known intellectuals.

Step 3 Reading

Get the students to comprehend the passage quickly and accurately, and

meanwhile help the Ss to form a good habit of reading. Read the passage on P34 to

get the answers to Part 1 and Part 2 of comprehending.

Silent reading

Read the text through in 3 mins, and then try to find the main idea of the text:

It tells us sth. that happened before Read the passage on Page 34 to get the answers to Part 1 and Part 2 of comprehending. ( 5 mins )

Understanding ideas

1.       Why did Elias support Nelson Mandela?

2.       What problems did Elias have?

3.       Why did he support violence when he did not agree with it?

4.       What would you have done if you were Elias?

Discussion of ideas

Here are some possible questions students could talk about:

1.       Why did the white people not treat black people fairly in South Africa?

2.       How do you think the white people stopped the black people from being treated fairly?

3.       Is it right for some people in one country to treat other people in the same country differently?

篇5：高一英语必修二unit3课件

(1)    课题：Friendship

(2)    教材分析与学生分析： 本单元的中心话题是“友谊”，几乎所有的内容都是围绕这一中心话题展开的。Warming Up部分以调查问卷的形式引导学生了解日常生活中朋友之间发生的真实问题以及解决这些问题的方法；Pre-Reading部分的几个问题启发学生对“友谊”和“朋友”进行思考，使学生明确不仅人与人之间可以做朋友，日记也可以成为人们的朋友；Reading部分Anne’s Best Friend以日记形式讲述了犹太女孩安妮的故事；Comprehending部分通过连句、多项选择和问答形式帮助学生对课文内容、细节进行更深入的理解; Using about Language 部分教学本课重点词汇和重点语法项目。

(3) 课时安排：The first period:  Speaking: Warming Up and Pre-Reading              The second period：  Reading

The third period:  Grammar

The forth Period：Listening

The fifth period: Writing

(4)教学目标：

①     知识与技能：Talk about friends and friendship; Practise talking about agreement and disagreement, giving advice and making decisions; Use direct speech and indirect speech; Learn to write an essay to express and support an opinion.

②     过程与方法：本单元在读前阶段就提出问题，让学生思考是不是只有人与人之间才能交朋友，然后在阅读中通过安妮的日记向学生说明我们也可以与动物及无生命的日记交朋友。在深刻理解、充分训练的基础上，可以再引导学生深入讨论几个与本单元话题有关的'问题：1.描述朋友； 2. 结交网友；3. 观点交流；4. 善不善交朋友; 5. 朋友的重要性。

③     情感态度与价值观：学完本单元后要求学生进行自我评价，主要评价自己在本单元中的学习情况。对书中的内容是否感兴趣，有哪些收获，解决了什么问题。使学生加深对友谊、友情的理解，以及如何正确交友，处理朋友之间发生的问题等。 (5) 教学重点和难点：

词汇：add point upset  ignore  calm  concern  cheat share  reason  list  series crazy  nature  purpose dare thunder entirely  power according  trust  suffer advice  situation  communicate   habit

短语： add up  calm down   have got to  be concerned about  go through   hide away  set down  on purpose  in order to  face to face  according to   get along with   fall in love   join in

重点语法项目： 直接引语和间接引语的互相转换

难点：Understand the real meaning of friends and friendship;

Discuss the answers to the questions (Reading);

How to teach the Ss to master the usage of Direct Speech and Indirect

Speech(Statement and Questions).

(6) 教学策略： Discussion, Student-centered vocabulary, learning, listening, pair  work, teach grammar in real situation

(7) 教学煤体设计： A projector and a tape recorder.

(8) 教学过程：详见以下分课时教学设计。

(9) 课堂练习与课外作业设计： 穿插于分课时教学设计中

（10）教学反思或值得改进的地方： 见每个课时最后部分。

篇6：高一数学必修3课件

高一数学必修3课件

高一数学必修3教学设计课件

第一章 算法初步

本章教材分析

算法是数学及其应用的重要组成部分，是计算科学的重要基础.算法的应用是学习数学的一个重要方面.学生学习算法的应用,目的就是利用已有的数学知识分析问题和解决问题.通过算法的学习,对完善数学的思想，激发应用数学的意识,培养分析问题、解决问题的能力，增强进行实践的能力等，都有很大的帮助.

本章主要内容：算法与程序框图、基本算法语句、算法案例和小结.教材从学生最熟悉的算法入手，通过研究程序框图与算法案例，使算法得到充分的应用，同时也展现了古老算法和现代计算机技术的密切关系.算法案例不仅展示了数学方法的严谨性、科学性，也为计算机的应用提供了广阔的空间.让学生进一步受到数学思想方法的熏陶，激发学生的学习热情.

在算法初步这一章中让学生近距离接近社会生活，从生活中学习数学，使数学在社会生活中得到应用和提高，让学生体会到数学是有用的，从而培养学生的学习兴趣.“数学建模”也是高考考查重点.

本章还是数学思想方法的载体，学生在学习中会经常用到“算法思想” “转化思想”，从而提高自己数学能力.因此应从三个方面把握本章：

（1）知识间的联系；

（2）数学思想方法；

（3）认知规律.

本章教学时间约需12课时，具体分配如下（仅供参考）：

1.1.1  算法的概念 约1课时

1.1.2  程序框图与算法的基本逻辑结构 约4课时

1.2.1  输入语句、输出语句和赋值语句 约1课时

1.2.2  条件语句 约1课时

1.2.3  循环语句 约1课时

1.3算法案例 约3课时

本章复习约1课时

1.1  算法与程序框图

1.1.1  算法的概念

整体设计

教学分析

算法在中学数学课程中是一个新的概念，但没有一个精确化的定义，教科书只对它作了如下描述：“在数学中，算法通常是指按照一定规则解决某一类问题的明确有限的步骤.”为 了让学生更好理解这一概念，教科书先从分析一个具体的二元一次方程组的求解过程出发，归纳出了二元一次方程组的求解步骤，这些步骤就构成了解二元一次方程组的算法.教学中，应从学生非常熟悉的例子引出算法，再通过例题加以巩固.

三维目标

1.正确理解算法的概念,掌握算法的基本特点.

2.通过例题教学，使学生体会设计算法的基本思 路.

3.通过有趣的实例使学生了解算法这一概念的同时，激发学生学习数学的兴趣.

重点难点

教学重点：算法的含义及应用.

教学难点：写出解决一类问题的算法.

课时安排

1课时

教学过程

导入新课

思路1（情境导入）

一个人带着三只狼和三只羚羊过河，只有一条船，同船可容纳一个人和两只动物，没有人在的时候，如果狼的数量不少于羚羊的数量狼就会吃羚羊.该人如何将动物转移过河？请同学们写出解决问题的步骤，解决这一问题将要用到我们今天学习的内容——算法.

思路2（情境导入）

大家都看过赵本山与宋丹丹演的小品吧，宋丹丹说了一个笑话，把大象装进冰箱总共分几步？

答案：分三步，第一步：把冰箱门打开；第二步：把大象装进去；第三步：把冰箱门关上.

上述步骤构成了把大象装进冰箱的算法，今天我们开始学习算法的概念.

思路3（直接导入）

算法不仅是数学及其应用的重要组成部分，也是计算机科学的重要基础.在现代社会里，计算机已成为人们日常生活和工作中不可缺少的工具.听音乐、看电影、玩游戏、打字、画卡通画、处理数据，计算机是怎样工作的呢？要想弄清楚这个问题，算法的学习是一个开始.

推进新课

新知探究

提出问题

（1）解二元一次方程组有几种方法？

（2）结合教材实例 总结用加减消元法解二元一次方程组的步骤.

（3）结合教材实例 总结用代入消元法解二元一次方程组的步骤.

（4）请写出解一般二元一次方程组的步骤.

（5）根据上述实例谈谈你对算法的理解.

（6）请同学们总结算法的特征.

（7）请思考我们学习算法的意义.

讨论结果：

（1）代入消元法和加减消元法.

（2）回顾二元一次方程组

的求解过程，我们可以归纳出以下步骤：

第一步，①+②×2，得5x=1.③

第二步，解③，得x= .

第三步，②-①×2，得5y=3.④

第四步，解④， 得y= .

第五步，得到方程组的解为

(3)用代入消元法解二元一次方程组

我们可以归纳出以下步骤：

第一步，由①得x=2y－1.③

第二步，把③代入②，得2(2y－1)+y=1.④

第三步，解④得y= .⑤

第四步，把⑤代入③，得x=2× －1= .

第五步，得到方程组的解为

(4)对于一般的二元一次方程组

其中a1b2－a2b1≠0,可以写出类似的求解步骤：

第一步，①×b2-②×b1，得

（a1b2－a2b1）x=b2c1－b1c2.③

第二步，解③，得x= .

第三步，②×a1-①×a2，得（a1b2－a2b1）y=a1c2－a2c1.④

第四步，解④，得y= .

第五步，得到方程组的解为

(5)算法的定义：广义的算法是指完成某项工作的方法和步骤，那么我们可以说洗衣机的使用说明书是操作洗衣机的算法，菜谱是做菜的算法等等.

在数学中，算法通常是指按照一定规则解决某一类问题的明确有限的`步骤.

现在，算法通常可以编成计算机程序，让计算机执行并解决问题.

(6)算法的特征：①确定性：算法的每一步都 应当做到准确无误、不重不漏.“不重”是指不是可有可无的，甚至无用的步骤，“不漏” 是指缺少哪一步都无法完成任务.②逻辑性：算法从开始的“第一步”直到“最后一步”之间做到环环相扣，分工明确，“前一步”是“后一步”的前提， “后一步”是“前一步”的继续.③有穷性：算法要有明确的开始和结束，当到达终止步骤时所要解决的问题必须有明确的结果，也就是说必须在有限步内完成任务，不能无限制地持续进行.

(7)在解决某些问题时，需要设计出一系列可操作或可计算的步骤来解决问题，这些步骤称为解决这些问题的算法.也就是说，算法实际上就是解决问题的一种程序性方法.算法一般是机械的，有时需进行大量重复的计算，它的优点是一种通法，只要按部就班地去做，总能得到结果.因此算法是计算科学的重要基础.

应用示例

思路1

例1  （1）设计一个算法，判断7是否为质数.

（2）设计一个算法，判断35是否为质数.

算法分析：（1）根据质数的定义，可以这样判断：依次用2—6除7，如果它们中有一个能整除7，则7不是质数，否则7是质数.

算法如下：（1）第一步，用2除7，得到余数1.因为余数不为0，所以2不能整除7.

第二步，用3除 7，得到余数1.因为余数不为0，所以3不能整除7.

第三步，用4除7，得到余数3.因为余数不为0，所以4不能整除7.

第四步，用5除7，得到余数2.因为余数不为0，所以5不能整除7.

第五步，用6除7，得到余数1.因为余数不为0，所以6不能整除7.因此，7是质数.

（2）类似地，可写出“判断35是否为质数”的算法：第一步，用2除35，得到余数1.因为余数不为0，所以2不能整除35.

第二步，用3除35，得到余数2.因为余数不为0，所以3不能整除35.

第三步，用4除35，得到余数3.因为余数不为0，所以4不能整除35.

第四步，用5除35，得到余数0.因为余数为0，所以5能整除35.因此，35不是质数.

点评：上述算法有很大的局限性，用上述算法判断35是否为质数还可以，如果判断1997是否为质数就麻烦了，因此，我们需要寻找普适性的算法步骤.

变式训练

请写出判断n(n >2)是否为质数的算法.

分析：对于任意的整数n( n>2)，若用i表示2—(n-1)中的任意整数，则“判断n是否为质数”的算法包含下面的重复操作：用i除n,得到余数r.判 断余数r是否为0，若是，则不是质数；否则，将i的值增加1，再执行同样的操作.

这个操作一直要进行到i的值等于(n-1)为止.

算法如下：第一步，给定大于2的整数n.

第二步，令i=2.

第三步，用i除n,得到余数r.

第四步，判断“r=0”是否成立.若是，则n不是质数，结束算法；否则，将i的值增加1，仍用i表示.

第五步，判断“i＞（n-1）”是否成立.若是，则n是质数，结束算法；否则，返回第三步.

例2  写出用“二分法”求方程x2-2=0 (x>0)的近似解的算法.

分析：令f(x)=x2-2,则方程x2-2=0 (x>0)的解就是函数f(x)的零点.

“二分法”的基本思想是：把函数f(x)的零点所在的区间［a,b］(满足f(a)f(b)<0）“一分为二”，得到［a,m］和［m,b］.根据“f(a)f(m)<0”是否成立，取出零点所在的区间［a,m］或［m,b］，仍记为［a,b］.对所得的区间［a,b］重复上述步骤，直到包含零点的区间［a,b］“足够小”，则［a,b］内的数可以作为方程的近似解.[来源:学&科&网Z&X&X&K]

解：第一步，令f(x)=x2-2,给定精确度d.

第二步，确定区间［a,b］，满足f(a)f(b)<0.

第三步，取区间中点m= .

第四步，若f(a)f(m)<0，则含零点的区间为［a,m］；否则，含零点的区间为［m,b］.将新得到的含零点的区间仍记为［a,b］.

第五步，判断［a,b］的长度是否小于d或f(m）是否等于0.若是，则m是方程的近似解；否则，返回第三步.

当d=0.005时，按照以上算法，可以得到下表.

a b |a-b|

1 2 1

1 1.5 0.5

1.25 1.5 0.25

1.375 1.5 0.125

1.375 1.437 5 0.062 5

1.406 25 1.437 5 0.031 25

1.406 25 1.421 875 0.015 625

1.414 062 5 1.421 875 0.007 812 5

1.414 062 5 1.417 968 75 0.003 906 25

于是，开区间（1.414 062 5,1.417 968 75）中的实数都是当精确度为0.005时的原方程的近似解.实际上，上述步骤也是求 的近似值的一个算法.

点评：算法一般是机械的，有时需要进行大量的重复计算，只要按部就班地去做，总能算出结果，通常把算法过程称为“数学机械化”.数学机械化的最大优点是它可以借助计算机来完成，实际上处理任何问题都需要算法.如：中国象棋有中国象棋的棋谱、走法、胜负的评判准则；而国际象棋有国际象棋的棋谱、走法、胜负的评判准则；再比如 申请出国有一系列的先后手续，购买物品也有相关的手续……

思路2

例1  一个人带着三只狼和三只羚羊过河，只有一条船，同船可容纳一个人和两只动物，没有人在的时候，如果狼的数量不 少于羚羊的数量就会吃羚羊.该人如何将动物转移过河？请设计算法.

分析：任何动物同船不用考虑动物的争斗但需考虑承载的数量，还应考虑到两岸的动物都得保证狼的数量要小于羚羊的数量，故在算法的构造过程中尽可能保证船里面有狼，这样才能使得两岸的羚羊数量占到优势.

解：具体算法如下：

算法步骤：

第一步：人带两只狼过河，并自己返回.

第二步：人带一只狼过河，自己返回.

第三步：人带两只羚羊过河，并带两只狼返回.

第四步：人带一只羊过河，自己返回.

第五步：人带两只狼过河.

点评：算法是解决某一类问题的精确描述，有些问题使用形式化、程序化的刻画是最恰当的.这就要求我们在写算法时应精练、简练、清晰地表达，要善于分析任何可能出现的情况，体现思维的严密性和完整性.本题型解决问题的算法中某些步骤重复进行多次才能解决，在现实生活中，很多较复杂的情境经常遇到这样的问题，设计算法的时候，如果能够合适地利用某些步骤的重复，不但可以使得问题变得简单，而且可以提高工作效率.

例2  喝一杯茶需要这样几个步骤：洗刷水壶、烧水、洗刷 茶具、沏茶．问：如何安排这几个步骤？并给出两种算法，再加以比较．

分析：本例主要为加深对算法概念的理解，可结合生活常识对问题进行分析，然后解决问题．

解：算法一：

第一步，洗刷水壶.

第二步，烧水.

第三步，洗刷茶具.

第四步，沏茶.

算法二：

第一步，洗刷水壶.

第二步，烧水，烧水的过程当中洗刷茶具.

第三步，沏茶.

点评：解决一个问题可有多个算法，可以选择其中最优的、最简单的、步骤尽量少的算法．上面的两种算法都符合题意，但是算法二运用了统筹方法的原理，因此这个算法要比算法一更科学．

例3  写出通过尺轨作图确定线段AB一个5等分点的算法.

分析：我们借助于平行线定理，把位置的比例关系变成已知的比例关系，只要按照规则一步一步去做就能完成任务.

解：算法分析：

第一步，从已知线段的左端点A出发，任意作一条与AB不平行的射线AP.

第二步，在射线上任取一个不同于端点A的点C，得到线段AC.

第三步，在射线上沿AC的方向截取线段CE=AC.

第四步，在射线上沿AC的方向截取线段EF=AC.

第五步，在射线上沿AC的方向截取线段FG=AC.

第六步，在射线上沿AC的方向截取线段GD=AC，那么线段AD=5AC.

第七步，连结DB.

第八步，过C作BD的平行线，交线段AB于M，这样点M就是线段AB的一个5等分点.

点评：用算法解决几何问题能很好地训练学生的思维能力，并能帮助我们得到解决几何问题的一般方法，可谓一举多得，应多加训练.

知能训练

设计算法判断一元二次方程ax2+bx+c=0是否有实数根.

解：算法步骤如下：

第一步，输入一元二次方程的系数：a，b，c.

第二步，计算Δ=b2－4ac的值.

第三步，判断Δ≥0是否成立.若Δ≥0成立，输出“方程有实根”；否则输出“方程无实根”，结束算法.

点评：用算法解决问题的特点是：具有很好的程序性，是一种通法.并且具有确定性、逻辑性、有穷性.让我们结合例题仔细体会算法的特点.

拓展提升

中国网通规定：拨打市内电话时， 如果不超过3分钟，则收取话费0.22元；如果通话时间超过3分钟，则超出部分按每分钟0.1元收取通话费，不足一分钟按一分钟计算.设通话时间为t（分钟），通话费用y（元），如何设计一个程序，计算通话的费用.

解：算法分析：

数学模型实际上为：y关于t的分段函数.

关系式如下：

y=

其中［t－3］表示取不大于t－3的整数部分.

算法步骤如下：

第一步，输入通话时间t.

第二步，如果t≤3，那么y=0.22；否则判断t∈Z 是否成立，若成立执行

y=0.2+0.1×(t－3)；否则执行y=0.2+0.1×（［t－3］+1）.

第三步，输出通话费用c.

课堂小结

（1）正确理解算法这一概念.

(2)结合例题掌握算法的特点，能够写出常见问题的算法.

作业

课本本节练习1、2.

设计感想

本节的引入精彩独特，让学生在感兴趣的故事里进入本节的学习.算法是本章的重点也是本章的基 础，是一个较难理解的概念.为了让学生正确理解这一概念，本节设置了大量学生熟悉的事例，让学生仔细体 会反复训练.本节的事例有古老的经典算法，有几何算法等，因此这是一节很好的课例.

篇7：高一英语必修课件

高一英语必修课件

第一部分：英语知识运用（共三节，满分54分）

第一节：单项填空（共15小题；每小题1分， 满分15分）

1. He sat at the desk, __________ a novel.

A. read B. to read C. reading D. reads

2. If you cheat in the exam, you could hardly _________ it.

A. throw away B. get away C. get away from D. get away with

3. No potatoes for me—I’m _______ a diet.

A. at B. in C. on D. with

4. The speed of cars and trucks is _____ to 30 kilometers per hour in large cities in China.

A. limited B. limiting C. limiting to D. limited to

5. Smoking is a bad habit. You should _________ it.

A. throw away B. get away with C. get rid of D. throw

6. I’m really tired _______ Tom. He had me _________ for two hours in the rain.

A. of, waiting B. with; wait C. of; waited D. with; waited

7. Bob ran the 100 meters in 9.91 seconds, and I have not seen ________ this year. (浙江 2005)

A. the best B. better C. the most D. more

8. Filled with anger, he didn’t shout or swear, but just ________ silently at me.

A. looked B. stared C. glared D. glanced

9. — Why was Tom scolded by our teacher? — For ________.

A. tell a lie B. telling lies C. told lies D. telling lie

10. — Anything new in the new regulations? — They will be ________ to us all.

A. of great benefit B. do harms C. do many good D. for the benefit

11. Must I get through the business in one evening? No, you ________.

A. mustn’t B. haven’t C. needn’t to D. don’t have to

12. Your article is too long. You must _______ to about 3000 words.

A. cut it off B. cut it up C. cut it down D. cut it into

13. If your knowledge can be in some way _______ with my experiences, we are sure to succeed.

A. joined B. united C. connected D. combined

14. The news was so ____ that all the people present at the meeting were _______ at it.

A. amazing, amazing B. amazed, amazed C. amazing, amazed D. amazed, amazing

15. You ______be sitting in this waiting room, sir. You see, it is for women and children only.

A. oughtn’t to B. dare not C. need not D. will not

第二节：完形填空（共15小题；每小题1分， 满分15分）

阅读下面短文，掌握其大意，然后从1~10各题所给的四个选项（A、B、C和D）中，选出最佳选项，并把答案写在答题卷上。

Every person needs water and a diet of healthy foods. These foods should contain some fat, some fiber, a little salt and so on.

People need energy 16 . They eat different kinds of food which change into energy. The energy is 17 in calories. Even when you 18 , you are using energy – about 65 calories an hour. 19 you are at school, or walking home, your body is burning up 100 calories an hour. When playing football or basketball, you 20 be using 400 calories an hour. On Sports Day, during the relay race, you will use most of all, 21 as much as 650 calories an hour.

The Chinese diet is considered to be the healthiest in the world. It contains a lot of fruit and green vegetables. It is 22 in fiber and low in sugar and fat. The Chinese eat less sugar than many other countries in the world. That is 23 lots of people in China have healthy white teeth.

People in the Western world do not eat such healthy foods. They eat 24 fat and sugar and don’t take enough 25 . Because of this, they 26 weight very easily. Their diet contains a lot of fat in the 27 of potato crisps, potato chips, butter, cream and chocolate. They eat a lot of sugar which exist in cakes, soft drinks, 28 and so on. The result is that many of them become fat. 29 some have bad teeth. In some parts of Britain, one person in ten, 30 the age of thirty, has no teeth left.

16. A. for lifeB. to live C. to live withD. for a living

17. A. measuringB. takenC. measuredD. measure

18. A. are asleepB. fall asleepC. go to sleep D. go to bed

19. A. WhileB. DuringC. AsD. If

20. A. mustB. canC. needD. might

21. A. surelyB. usuallyC. perhapsD. hardly

22. A. richB. poorC. goodC. bad

23. A. howB. whyC. whatD. that

24. A. much tooB. many tooC. too manyD. too much

25. A. exercisesB. foodC. workD. exercise

26. A. put onB. gain onC. get onD. put up

27. A. typeB. formC. kindD. sort

28. A. sweetsB. sweetC. candy barD. sweet thing

29. A. ButB. OrC. AndD. So

30. A. atB. forC. withD. by

第三节：阅读理解（共12小题；每小题2分，满分24分）

阅读下列短文，从每题所给的'四个选项（A、B、C和D）中，选出最佳选项，并把答案写在答题卷上。 A．

A car needs gas to run and your body also needs food to work for you. Eating the right kind of food is very important. It can keep your body strong, so take care of what you eat.

There are four main food groups altogether. The dairy products group has food like milk, cheese and sour milk. The other three groups are the meat and fish group, the fruit and vegetable group, and the bread and rice group. Each meal should have at least one food from all the four main groups. With all these food together you will be given enough energy during the day.

It is easy to get into bad eating habits. You may eat your breakfast in a hurry to get to school on time. Or you may not have time for a good lunch. It may seem easy to finish your supper with fish and chips all the time. But you will find yourself tired during these days and you can not think quickly.

Watching what you eat will help keep your body healthy and strong. It is also good to take some exercise. It will help you eat more if you take a walk or play games in the open air. Having a good eating habit with some exercise is the key to your health.

31. Which of the following diets do you think is the best one?

A. Eggs, tomatoes and chicken.B. Milk, bread, cabbages and beef.

C. Corn, fish, cream and pork. D. Rice, beancurd, apples, fish and chicken.

32. Which of the following is a good eating habit?

A. Going to school without any breakfast.B. Eating fish and chips for supper all the time.

C. Finishing your lunch in a very short time.

D. Having at least one food from all the four groups each meal.

33. In this passage the writer mainly tells us that ______.

A. every person needs food to grow wellB. taking exercise can keep your body strong

C. right kind of food with exercise will keep you healthy

D. enough energy helps people think more quickly

B.

Good health is the most valuable thing a person can have, but one cannot take good health for granted. It is important to remember that the body needs proper care in order to be healthy. There are three things that a person can do to help stay in good shape: eat right food ,get enough sleep, and exercise regularly.

Proper nutrition (营养) is important for good health. Your body cannot work well unless it receives the proper kind of “fuel”(燃料).Don't eat too much food with lots of sugar and fat. Eat plenty of foods high in protein (蛋白质) ,like meat, fish, eggs and nuts. Vegetables and fruits are very important because they provide necessary vitamins (维他命) and minerals. However, don't overeat. It is not helpful to be overweight.

Getting the proper amount of sleep is also important. If you don't get enough sleep, you feel tired and easily get angry. You have no energy. Over a long period of time a little a amount of sleep may even result in a change of personality (人的个性).Be sure to allow yourself from seven to nine hours of sleep each night. If you do, your body will feel strong and refreshed, and your mind will be sharp.

Finally, get plenty of exercise. Exercise firms the body, strengthens the muscles, and prevents you from gaining weight. It also improves your heart and lungs. If you follow a regular exercise program, you will probably increase your life-span (寿命).Any kind of exercise is good. Most sports are excellent for keeping the body in good shapes: basketball, swimming, bicycling, running and so on are good examples. Sports are not only good for your body, but they are enjoyable and interesting, too.

If everybody, were to eat the right foods, get plenty of sleep and exercise regularly, the world would be a happier and healthier place. We would all live to be much older and wiser.

34. According to the passage,_________.

A .we should always keep fit

B. if we were healthy, we could spend our days in doing things with less sleep

C. one can eat a lot to stay in good shape

D. one needn't take any exercise if he is healthy

35.In order to keep good health, ___________ .

A. we should eat a lot of sweets B. one needs a large amount of fat

C. people should eat according to the foods nutrition D. we must try to sleep now and then

36. Eating more and sleeping less________.

A. can keep healthy B. is no good for you

C. gets you more energy D. will keep your personality

37.The writer explains ________in this passage.

A. how to eat B. the importance of doing exercise

C. how to keep healthy D. what to eat

38.The title of the article should be___________ .

A. Eating and Exercising B. How Vitamins Work in Man's Body

C. Staying Healthy D. Sleeping Well

C.

Isn't it astonishing how much time we spend talking about food? “Have you ever eaten …?” “What did you have for lunch?” and so on. And yet when you travel from one country to another, you will find that people have quite different feelings about food. People often feel that what they eat is normal (正常) and that what other people eat is strange or silly. In most parts of Asia, for example, no meal is complete without rice. In England, people eat potatoes every day. In the Middle East, bread is the main part of every meal. Eating like so many things we do, becomes a habit which is difficult to change. Americans like to drink a lot of orange juice and coffee. The English drink tea four or five times every day. Australians drink a great deal of beer, and the French drink wine every day.

The sort of meat people like to eat also differs from one country to another. Horse meat is thought to be delicious in France. In Hong Kong, some people enjoy eating snakes. New Zealander eat sheep, but they never eat goat meat. The Japanese don't like to eat sheep meat be-cause of its smell, but they enjoy eating raw fish (生鱼).

So it seems that although eating is a topic we can talk about for hours, there is very little common sense in what we say it. People everywhere enjoy eating what they have always eaten, and there is very little we can do to change our eating habits.

39. Which of the following is true according to the article?

A. All people have the same feeling about food.

B. In most parts of Asia, people usually have rice for meals.

C. People often consider other people to be strange or silly.

D. The topic people spend time talking about is bread and meat.

40. People in different countries .

A. drink the same sort of wineB. have the same eating habit

C. eat different kinds of meatD. have the same tea at different time within a day

41. The Japanese don't like to eat sheep meat .

A. because they dislike its smellB. because it is too expensive

C. because it is easy to go badD. because they think it will do harm to their health

42. English people drink tea four or five times a day .

A. because they get thirsty easilyB. because there is plenty of tea in Britain

C. because of their drinking habitD. because they have enough time to do so

第二部分：英语技能运用

第一节：根据句子的意思，写出正确的单词，并注意词的正确形式。（共10小题；10分）。

1. He gained all his ________(力量) and was ready for a second try.

2. I patted her _______(温柔地) on the shoulder.

3. It is healthier to keep a b_______ diet every day.

4. This restaurant was not giving its ______(顾客) energy-giving food.

5. ________ (好奇心)drove Wang Pengwei inside Yong Hui’s restaurant.

6. Wang Pengwei stopped worrying and started advertising the _______(好处) of his food.

7. To succeed, we must ___________(结合) talent with working hard.

8. He has been working for a long time, but he is still full of __________.（energetic）

9. You should do some _________(研究) before making the final decision.

10. She is not _________(苗条的)enough to wear these tight trousers.

第二节：用正确的情态动词填空（共5小题；5分）

1. When we are cooking with a gas fire, we ________(can / must) keep the window open.

2. Mr. Joseph has stayed in the US for several years. He _____(may / can) speak English quite well.

3. Jack’s ill, so they ______ (must / have to) change their plans.

4. It _______ (can't / mustn't) be Miss Gao. I know she has gone to Beijing.

5. You say you ________ not do it but I say you ____________ (shall / will)

第三节：根据中文意思完成句子(共5小题；10分)。

1. 我用了一个月才摆脱咳嗽。It took me a month to _____ _____ _____my cough.

2. 她欠我100块钱。 She _______ ________ _______ to me for 100 yuan RMB.

3. 我们应该抛弃考试作弊的坏习惯。We should ________ _________ the bad habit of cheating in the exam.

4.他们没有打架，只是站在那怒视对方。They didn’t fight, but stood there _____ ______ one another.

5．David 靠给报社写文章维生。David ____ _____ ______ by writing articles for newspapers.

篇8：北师大高一英语模块2课件

北师大高一英语模块2课件

北师大高一英语模块2课件

一、课程分析

该课大胆采用了新课标教学理念，创造性地使用教材，对课文内容进行创造性拓展与补充，改变传统教学过于注重传授知识的倾向，采用“任务型”教学模式，进行了实验和探究。“Tomorrow’s World”的中心话题是“谈未来”，内容主要涉及人类对未来网络空间的想象、猜测和思考。该课旨在激发学生的想象力，探讨未来的世界，达到使学生学会用英语交流、培养实际运用英语的能力。

二、学情分析

这个班虽然为普通平行班，英语基础较差，但是大部分学生的思维活动、学习热情、表现欲望和合作精神还是可以在平时的教学中不断提高和培养的。根据这些特点，教师可以采用与新课标要求相一致的新的教学方式，即活动式的教学法，这样面向全体学生便于调动全班学生的积极性，在师生互动、生生互动中实现教学任务和目标。

三、学习目标

1、展望未来，激发学生的想象力；

2、学习使用有关预测和猜测和表达方式；

3、培养学生用英语表达未来的生活状况，达到用英语交流、培养实际运用英语能力的目的；

4、运用所学英语写出具有丰富想象力的短文。

四、设计理念

“Tomorrow’s World”一课倡导英语新课标理念下的合作学习。根据英语《课程标准》的指导思想,英语课程改革的重点是要改变传统教学过分重视语法和词汇知识的讲解与传授、即忽视对学生实际语言运用能力的培养的倾向，强调课程从学生的学习兴趣和认知水平出发，倡导学生体验参与、合作与交流的学习方式和“任务型”的教学模式，由学生共同努力来实现教学目标。教师要引导学生利用所学语言来完成任务，促进学生运用所学外语获取信息，处理信息，使用信息与人交流，让学生去发现问题、设计问题并解决问题，提高合作意识，培养合作精神，从而实现学生的主体地位，发展学生的综合语言运用能力。

五、教学媒体设计

指导学生将信息技术与英语学习相整合,教师鼓励学生利用网络资源及多媒体技术积极探索和运用知识。让学生展开想象，搜集有关资料，制成课件。多媒体及网络可使师生实现资源共享。通过多媒体及网络的运用，可以培养学生搜集和处理信息的能力，获取新知识的能力、分析和解决问题的能力以及合作与交流的能力，拓展学生学习的渠道。

六、教学流程

（一）课前准备

确定教学方式。采用“任务型”教学方式。首先让学生自愿分成几个学习小组，向他们提出要求，布置学习任务。在教师指导下，全班学生先分成正反两方,然后自愿组成5-6人的小组，教材Unit4的主要话题就是the future of cyberspace，故以该话题为核心，让学生从网络等渠道收集有关未来网络空间的材料,准备在课堂上交流。这个活动能够调动学生课外英语学习的积极性，锻炼学生以合作形式收集资料、处理信息的能力，为学生提供运用英语的机会。教师与各小组学生协商后，最后确定这个话题，即“Do you feel pessimistic or optimistic about the future of the internet? Why?”。各小组成员收集好素材，在教师的指导下进行取舍和整理，并制作成多媒体课件。教师课前对每组的课件进行审核，指导学生选取重要的信息。之后每组选一个代表准备上讲台讲解，教师要纠正学生的一些错误语法、发音以及不地道的语言，并对学生及时给予鼓励和表扬，鼓励学生即兴发挥，从而激发学生们更高的参与热情。

（点评：学生从收集素材到制作课件，充分展现了他们自主学习能力、合作探究与交流能力、富有个性的创造能力和表达能力。教师课前的指导作用是不容忽视的。教师要对每组的合作做出及时和积极的评价。）

（二）导入

教师开始上课，首先让学生分成四个小组，抢答“How do you think computers and internet are going to affect our life?”。学生们积极举手回答，想象也非常丰富，一下子调动了学生们的积极性，使课堂气氛活跃起来。教师将几个可能用到的句型写在黑板上，如:“Suppose that…,imagine that…,It is likely that…,It is possible that…”指导学生运用。

(点评：如果能放一段有关未来网络空间的录像，导入“the future of cyberspace”主题,可能会收到更好的效果。）

（三）实践

切入主题后，教师深入学生中间，给予激励性评价，询问学生是否分组准备好要说的话题，鼓励学生上台展示课件，讲解有关网络空间的未来。由每组学生派代表上讲台讲解，如,“I am optimistic about the future of the Internet, because the Net has become apart of our life. We do many things on it, such as…”etc.上台的几个学生代表表现得很好，有时还能即兴发挥,正反双方不时还有辩论。

（点评：当学生们看到同班同学能上台用英语结合图片资料，讲解未来网络世界时，表现出极大的兴趣。此时，教师应给予更多的激励性评价。上来发言的几个同学发挥得非常好。课堂充分体现了“以教师为主导，学生为主体”的教学理念。）

（四）拓展

学生们探讨未来网络世界以后，教师又布置了一项任务，即分组讨论：“What you will be in the future”,将这堂课推向高潮，以小组的形式进行讨论、交流与合作，并选一名代表进行书写记录，最后读给全班听。学生讨论时，教师要给予指导，比如：What will you do? How will you prepare for?

（点评：这样的合作学习能激励学生的.创新热情，注重学生合作精神的培养。教师要多给予激励性评价。这种活动将英语教学的听、说、读和写四步有机地结合起来，充分培养了学生用英语交流和实际运用英语的能力。）

（五）放音乐

最后放一首英文歌曲，名字叫“What will be, will be”,歌曲的主题也是:“What will you be in the future”,学生们跟着优美的旋律唱起来，没想到唱得非常好听。唱完后布置写作作业。

Home work: Write a passage about what you will be in the future.

（点评：学生们唱得很好，这首歌刚好与这节课的主题相吻合，恰到好处，效果非常好，使课堂教学内容得以升华。从英语的角度来说，这首歌和作业的设计使整个教学流程达到了听、说、读、写完美的结合。从而获得和加强了学生实际应用英语的能力，使学生感悟学习英语的乐趣。）

结束语

此节课上得比较成功，虽然是普通平行班，但整个课堂气氛都很活跃。这堂课的亮点是充分体现了“以学生为主体”的教学理念，在教师的指导下将课堂“还”给学生，学生们发言及表演的时间占了整节课的三分之二，由过去的教师“教”为主转变为学生“学”为主。在学生们的发言及表演中看到了学生们每个人的闪光点，加强了师生之间的沟通与互动，调动了全体学生学习英语的积极性，培养了他们的合作精神和实际运用英语的能力。

课后反思

1、“Tomorrow’s World”一课无论从教学内容、教学方法还是从教学手段上都实行了创新设计与构思，同时有效地采用了课程标准中所倡导的“任务型”教学途径，激发了学生的学习兴趣，培养了学生的交际英语能力。如何变“接受性学习”为“创造性学习”，关键在于教师。在教学中教师要努力地创设民主和谐的学习氛围。英语教师的角色不再是单纯的知识传授者，而是学生学习的组织者、引导者、参与者和促进者。在课堂上，教师有时可以组织讨论，有时可以让学生辩论，有时甚至可以让学生上讲台当老师。

2、“Tomorrow’s World”一课是有益的教学方式的创新尝试。其巧用教材，对课文内容进行创造性拓展与补充；尤其是鼓励学生收集素材，制作课件，上台讲解，值得推广，此举可提高同学们的合作交流意识，同时还可不断改进同学们的口语表达能力和综合运用语言的能力，在“Tomorrow’s World”一课的基础上，今后可加大力度进一步培养学生的自主、合作与探究精神。教师要不断学习，拓宽课程设计的思维空间,发挥学生想象力,开启学生创新思维。在教学中，教师根据教材正确地诱发学生的想象力。比如，让学生想象“What will life be in the future”,通过想象，学生就能自由地表达他们的思想。

3、“Tomorrow’s World”教学过程中，教师应在各个环节进行及时评价，效果会更好。还可在各小组之间展开竞争，通过自评与互评的方式，评出最佳课件、最佳讲解员等，以此来激励学生的参与意识，更能使学生体验自信与成功的乐趣，从而激发学生更大的学习激情和参与热情。

4、该课是将信息技术与英语教学相整合的一个例子。以多媒体计算机及网络技术为核心的现代教育技术作为一种创新型教学手段，有利于适时拓展教学容量，最大限度地挖掘学生的创造力。例如，教师在教“Tomorrow’s World”一课时，引导学生按照各自的爱好，利用信息技术自主制作课件，根据讨论话题“the future of cyberspace”，设计了“Crime in cyberspace”,“Hackers”,“Shopping in the net”,and“Virtual reality”等几个板块，呈现出未来网络空间的各种状况，并用英语简单地描述未来情况。学生在这些课件呈现的课堂活动中丰富了想象，拓展了思维。注意信息技术与英语教学的整合，不仅老师、而且学生也将信息技术运用到英语的教与学当中。

教学有法，教无定法。不足之处还需加以改进，不断完善。教师在教学过程中应不拘一格，综合学生、教材、教法及自身教学风格，创造性地开展教学活动，激活学生的学习热情，激发学生的学习兴趣，激励学生的学习信心，永葆英语课的新鲜、趣味、活泼。因此，在英语教学中教师要精心设计课堂教学，注重教学方法，要重视让学生在创造性的学习活动中获得愉悦的心理体验，这种体验一方面来自教师对学生的评价，更主要的是让学生在自主发现的活动中获得。学生几个人一组，全身心地投入到活动中去，有的负责收集资料，有的负责制作课件，有的上台表演，创造力得到充分的体现。学生在体验中享受到了快乐，在快乐中发挥了创造力。

把信息技术引入英语教学，引起了英语教学方式和方法的革命性变革。但是，目前我们教师大量进行的课件设计，主要都是教学方式和方法方面的整合。实际上，信息技术更重要的是用于教学资源的开发，特别是指导学生将信息技术与英语学习相整合，比如收集资料，制作课件，并在课堂上交流。教育的过程本身就是一种探索与创造，教师要不断探索课堂教学的新思路、新方法，引导学生发现、探究、解决问题，才能培养学生的开拓精神和创新意识，逐步培养其独立获得知识、创造性运用知识的能力。

篇9：北师大高一英语unit4lesson4课件

北师大高一英语unit4lesson4课件

高一unit4 Earthquakes教案

Unit 4 Earthquakes

THE FIRST PERIOD READING

Class: Class One,Grade One Subject: English

Teacher: Shen Chang Tutor: Jiang Hailian

I. Teaching Aims

Know basic knowledge of earthquakes.

Know how to protect oneself and help others in disasters.

Ⅱ. Important & Different Points

Phrases: right away, at an end, dig out, give out, thousands of

1.Farmers’ wives noticed that the well walls had deep cracks in them.

2.It seemed as if the world was at an end!

3.Bricks covered the ground like red autumn leaves.

4.The army organized teams to dig out those who were trapped and to bury the dead.

5.Workers built shelters for survivors whose homes had been destroyed.

III. Teaching Procedure

Step I. Revision

Check the homework with the whole class.

Step II. Warming up

Ask the students to read the instructions and make sure they know what to do, and then have a discussion about the two pictures.

T: Today, before we begin our reading, I’d like to ask you a question, “What is the biggest sound you have heard in your life?”

S1: The sound of wind that blew in a winter night when I was very young. It sounded like a ghost who was howling. I was very frightened at that time.

S2: The biggest noise was the one that I heard when my neighbor was quarrelling with his wife. Perhaps, they broke their TV set.

T: That’s too terrible.

S3: The noise when planes take off.

S4: The sound of trains.

T: Good! I agree that all of them are big sound. But did you once heard the sound that the heaven falls and the earth cracks, in Chinese it is 天崩地裂?

Ss: No, we have no chance to hear that.

T: If there is a sound like this, what is it?

S5: When someone hears something unexpected and terrible. For example, when one of his loved families dies, he will feel this sound.

T: Terrific! You are using a literary way to express the sound.

S6: When an earthquake happens.

T: Great! I have waited for this answer for a long time. Today we’ll learn something about earthquakes. I think most of us have heard of earthquakes. Can you imagine how terrible it is ?

S7: The earth is shaking . All the buildings will fall down.

S8: Many people will die. And perhaps many children will lose their parents.

T: Yeah, earthquakes are disasters to everybody. Now look at the two pictures of Tangshan and San Francisco. Can you describe what you see in the pictures?

S1: Tangshan is a beautiful city. It has beautiful gardens, broad roads and some tall buildings.

S2: From the picture of San Francisco, I can see that it is a very big city. There are many tall buildings thickly standing on the earth. I think the population of the city is very large.

T: Good! What will happen if there has been a big earthquake in these two cities? Work in pairs and discuss it. Then I’ll ask so me of you to show your opinion.

Step III. Pre-reading

There are two questions in this part. Both are very interesting. The first one can more or less reveal the students’ values; while the second one can enlarge their imagination. No matter what their answers are, as long as they have given careful thoughts to the situations, their answers should be good.

T: Now, let’s look at the pictures. What are the predictions of an earthquake?

S1: Before an earthquake animals will become nervous. Cows, pigs, horses and dogs will be upset. And people can see mice running about. If the earthquake happens during winter, people can even see snakes.

T: Terrific! Where did you get this knowledge?

S1: From geography. I like it.

T: good. Sit down please.

S2: Madam, I don’t know the meaning of the picture with two women.

T: It doesn’t matter. You will know it soon after reading our text. OK. Imagine there is an earthquake now, and your home is shaking, at this moment you have no time to take any other things but one, what will it be?

S3: I’ll take all my money. People can’t live without money.

S4: I will take as much water as possible. Because it is said that people can keep alive for nearly 7 days by drinking without any food

S5: In that case, I’d rather take some apples, so that besides drinking, I can also eat.

S6: I will carry my grandma. She is my most loved person in this world. She brought me up.

T: What a dutiful child you are! I’m very glad to hear that. Sit down please! It seems that all of you know what you should do during an earthquake. OK. Let’s read our text, and see what it tells us.

Step IV. Reading

In this part, teacher should ask the students to read the passage quickly for the first time to get the general idea of the passage. Ask them to pay attention to the first sentence of each paragraph. This can help them finish exercise3 in Comprehension. It is about the main idea of each paragraph. Then ask them to read the text again carefully to obtain some details. Before reading for the second time, show some questions on the screen, and let the students read the questions first. These questions can guide them to have a good understanding about the text. They can also make preparations for Exs1-2, which are about details.

Skimming

T: At first I’d like to read the text quickly to get the general idea of the article. While reading, you should pay attention to the sentence of each paragraph.

T: Have you got the general idea of the text?

Ss: Yes.

T: What is it?

S1: There is no quick answer to this question. Are you suggesting us that the general idea is the mixture of the first sentences of each paragraph?

T: Sure.

S1:OK. That’s easy. The main idea of the passage is some signs of the earthquake, and what would happen during the quake.

T: Good, sit down please. In fact, while we are answering the questions, we have involved the sequence, the functional item for this unit. (Teacher writes the word on the blackboard) Do you understand the meaning of the word?

Ss: No.

T: Sequence means the order of the events. It can tell us which event happens first, and which happens later. Do you know the sequence that is used in our text?

S3: Yes. At first, the text tells us something that happened before the quake, then it tells us the things that happened during the quake and at last it tells us the things that happened after the earthquake.

T: Quite right! Now please look at the screen, these are the first sentences of each paragraph. Read them and think if they are the main idea of the text. If necessary, you may make some changes to make more exact.

Teacher shows the screen and gives a little time to think it over.

1.Strange things were happening in the countryside in the northeast Hebei.

2.The disaster happened and caused a lot of loss.

3. All hope was not lost.

Careful reading

T: Now, it’s time for us to read the text carefully. But before reading, you should read some questions first. These questions may help you get some information quickly and easily. Now look at the screen, and read the questions.

Show on the screen

1.What natural signs of a coming disaster were there?

2.Can you think of some reasons why these signs weren’t noticed?

3.What events probably made the disaster worse?

4.What situations probably made the disaster worse?

5.How were the survivors held?

Step V. Extension

Show the questions on the screen.

1.From whose point of view are events described? How do you know?

2.What is the mood of this passage? How is it created?

3.Why do you think the writer chooses to express his feelings about the quake rather than simply reporting what had happened?

4.Why is the title A NIGHT THE EARTH DIDN’T SLEEP?

5.What does the sentence “Slowly, the city began to breathe again.” mean?

Answers:

1.He uses third-person to describe the quake. His description is very objective. For example, the second sentence in the third paragraph. The writer says: “Everywhere they looked nearly everything was destroyed.” The writer uses they instead of we.

2.The mood is serious and a bit sad. It is created by giving details of how many people and animals were killed or injured, and how many buildings were destroyed.

3.Although the writer was not there, he felt sad for the people of Tangshan. He knows that some personal feelings will make the reading more interesting.

4.I think the reason is that, as usual, night is the time to sleep, and night should be safe and quiet. But that night everything changed. The writer uses A NIGHT THE EARTH DIDN’T SLEEP as a title to show how terrible and how unusual the night was.

5.Here we can see that the writer compared the city to a person who suffered a lot in the disaster. He felt her pain, and he worried about her. So when he said that people came to help her, we can feel his feelings to the city. The city will not die, she has hope and she can recover from the pain.

Step VI Comprehending

Answers to Exx1-3

1.1. C 2. E 3.B 4.D 5.A

2.1. The walls of the villages wells had cracks in them.

2 .Roads got huge cracks

3. Brick buildings were destroyed.

4. The army helped the survivors.

5. Shelters were put up for those with no homes.

3.1. Strange things were happening in the countryside in northeast Hebei..

1.The disaster happened and caused a lot of loss.

2.All hope was not lost.

篇10：英语高一必修3作文

我的英语学习方法 My English Learning Method

I like English. I think I can share my English learning method with you. First of all, develop interest on English. My way to make it is to watch movies from abroad. At first, I will watch the movie with subtitle. Then I will remove the subtitle, only English left. Gradually, show great interest in English. Secondly, recite vocabularies. Vocabulary is the necessary foundation to start learn English. This time you have to force yourself to remember words. Thirdly, understand basic grammar thoroughly. It is hard for me to understand the meaning of a sentence if I don’t know the basic grammar. Last but not least is to speak more. The basic purpose to learn a language is to communicate. So talk in English as much as you can. And don’t worry about losing face, because everyone makes mistakes. Those are my methods.

我喜欢英语。我觉得我可以和你分享一下我的英语学习方法。首先，培养对英语的兴趣。我的方法是看国外电影。一开始，我会留着字幕一起看。之后我就会不看字幕，只留英文。渐渐地，我对英语表现出极大的兴趣。其次，背诵词汇。词汇是学习英语的必要根基。这一点你只能强迫自己去背了。第三，完全理解基本语法。如果我不懂基本语法，我会很难理解一整个句子的意思。最后但并非最不重要的是要多说。学习语言的基本目的就是进行沟通。因此，尽可能多的用英语交谈。不要担心丢脸，因为每个人都会犯错误的。这些就是我的方法。

篇11：英语高一必修3作文

旅行能带给我们好心情 Travel can Bring us good Mood

I think everyone likes to travel, so do I. since I go to college, I have traveled to many places. Every time I go to the new place, I will be very excited and learn the things. Travel is like a lesson for me, because I will broaden my vision and enrich my experience, when I finish the journey, I will come back with the good mood.

我想每个人都喜欢旅行，我也一样。自从我上了大学，我就已经去过了很多地方。每次我到一个新的地方，我都会很兴奋，也学到新东西。旅游对于我来说就像是一门课，因为我会开阔视野，丰富经验，旅行结束的时候，我会带着好的心情回来。

My travel to Tibet impresses me so much, it was July, I went to Tibet with my friends. We took the train, we were so excited, watching the scenery all the way, we saw the flatland, there were less green, which was so different from our place. When the train was close to Tibet, I felt so tired and I couldn't use my power, I knew it altitude sickness, it took me many hours to get used to it. Tibet has different color in different season, for me, its beautiful scenery is color on the way, I am not interested in its tourist site, I like its natural color.

去西藏的旅游我印象很深刻，那是在七月，我和朋友们去西藏。我们坐火车，很兴奋，看着沿途的风景，我们看到了平原，几乎没什么绿色，和我们的地方很不一样。在火车即将到达西藏的时候，我很累，使不上劲，我知道那是高原反应，过了很久我才适应下来。西藏在不同的季节有不同的颜色，对于我来说，它的美丽风景就是沿途的风景，我对景点不感兴趣，只喜欢它天然的颜色。

The trip to Tibet brings me much knowledge, I experience many things, all of these are precious for me and I have the good mood to my life.

去西藏的旅程给了长了知识，我体验了很多东西，所有的这些都很宝贵，我对生活有了好心情。

篇12：英语高一必修3作文

People travel by plane, by train, by ship, by bus. To me, the best way of traveling on a summer vacation is to go on foot.

My preference depends on the purpose of the travel. On a summer vacation I travel to refresh myself and to see the countryside. When I use my feet and walk on a gracovered path along a river or among the hills I feel detached from the noise of the city and closer to the nature. And when I travel on foot I get more freedom. I can plan my own schedule. I can choose my own route. I can stop where I like. And I can see things and people that I might miif I travel on a train or on a bus. net

When faster and more convenient ways for travel are becoming available, I still favor using my own feet. I get much pleasure from it. People travel by plane, by train, by ship, by bus. To me, the best way of traveling on a summer vacation is to go on foot.

篇13：英语高一必修3作文

Do you know what mottos are?They are things people say that have a special meaning.I have a super motto and it works like magic.My motto is “Just do your best.”

I say it all the time.My motto guides me everyday.It's very helpful to me.It helps me face challenges and takes away my wories.It makes me feel stronger,too.For example,I was sick on a day that I had an important test.I was very nervous and afraid,so I told myself,“Just do your best.”Then I tried my best.I gave it one hundred percent and I did a great job.

英语高一必修3作文

★ 英语高一必修3作文

★ 高一英语必修四课件

★ 高一语文必修3必修4

★ 高一英语课件

★ 高一必修一生物课件

★ 高一地理必修一课件

★ 高一数学必修二课件

★ 离骚高一必修2课件

★ 高一语文必修3《诗词》导学案

★ 高一语文必修3单元第二单元测试卷

北师大高一英语必修3课件（锦集13篇）

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