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推荐一篇来自Wiki的文章: Computer From Wikipedia, the free encyclopedia A computer is a machine that manipulates data according to a list of instructions. The first device that resemble modern computers date to the mid-20th century (around 1940 - 1945), although the computer concept and various machines similar to computers existed earlier. Early electronic computers were the size of a large room, consuming as much power as several hundred modern personal computers.[1] Modern computers are based on tiny integrated circuits and are millions to billions of times more capable while occupying a fraction of the space.[2] Today, simple computers may be made small enough to fit into a wristwatch and be powered from a watch battery. Personal computers in various forms are icons of the Information Age and are what most people think of as "a computer"; however, the most common form of computer in use today is the embedded computer. Embedded computers are small, simple devices that are used to control other devices — for example, they may be found in machines ranging from fighter aircraft to industrial robots, digital cameras, and children's toys. The ability to store and execute lists of instructions called programs makes computers extremely versatile and distinguishes them from calculators. The Church–Turing thesis is a mathematical statement of this versatility: any computer with a certain minimum capability is, in principle, capable of performing the same tasks that any other computer can perform. Therefore, computers with capability and complexity ranging from that of a personal digital assistant to a supercomputer are all able to perform the same computational tasks given enough time and storage capacity.

英文前言范文

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山寨天后

主讲英语语法的课堂里,当然要针对语法来制定一份教案了。下面是我给大家整理的英语语法教案范文,供大家参阅!

课堂教学有效性涉及到多方面的因素,课堂教学设计就是其中主要因素之一。英语教学设计是英语教师根据正确的教学思想和英语教育原理,按照一定的教学目的和要求,针对具体的教学对象和教材,对英语教学的整个程序及其具体环节、总体结构及其有关层面所做出的预期的行之有效的策划。因此,教学设计需遵循一定的原则。本文结合教学实践,着重探讨了在高中英语语法教学中进行课堂教学设计应遵循的几条原则。

【课堂教学设计应遵循的原则】

在语法教学实践过程中,笔者针对《普通高中英语课程标准》(以下简称《课标》)对高中英语教学的要求、语法教学的特点和高中生的心理特征,对教学内容、活动方式、媒体的运用及教学评价等方面进行了探究,发现要提高语法教学有效性,在进行课堂教学设计时需遵循以下五条原则:

(一) 新知识与旧知识相结合的原则

建构主义理论告诉我们:学习者不是被动的信息吸收者,而是在原有知识的基础上建构他们自己对知识的理解。因此,学生赖以学习新知识的材料必须与学生原有知识和经验有紧密的联系。

在语法学习过程中,学生需要通过发现新知识与原有知识之间的联系来构建对新知识的理解。人教版英语新教材(nsefc)虽为语法教学提供了载体,编排在discovering useful structures标题下,语法材料却不一定适合所有的学生去尝试、发现。如nsefc必修4第4单元body language中的语法内容是学习动词-ing形式在句子中做状语和定语,如果让学生根据第1题的要求,从课文中找出与所给例子结构相同的另外几个句子,然后发现其新的语法现象并归纳出使用中的语法结构,很多学生会发现不了,更不用说归纳了。因为,这些在教师看来很明白的东西,对学生来说,就不那么明显。而在完成第2题时,学生或许能“依样画葫芦”,却不能明白为什么要这样做。因此,教师必须明白教材只是为我们的教学提供了一个载体,在实际教学中要根据学生的实际情况需要对教材所提供的材料进行改造。如动词-ing形式做状语是由状语从句、简单句、并列句演变而来的,而这些学生在初中就已经学过。据此,教师可以将课本中的句子改为句子1a和句子2a,然后,让学生从课文中找出与句子1a和句子2a类似的句子1b和2b,并划出意义相同或相似但形式不同的内容。核对答案后,点明1a和2a是初中学过的句子结构,1b和2b是新的学习内容。这两组句子1a和1b、2a和2b之间可以相互转换,这样学生就比较容易理解新的语法知识,即句子1b和2b的产生了。

1a. I saw several young people enter the waiting area and they look around curiously.

1b. I saw several young people enter the waiting area looking around curiously.

2a. then akira nagata from Japan came in. he smiled, …

2b. then akira nagata from Japan came in smiling, …

学生通过对比去尝试发现两者之间的异同,从而找出两者之间的转换规律,发现新的语法结构,这样学生就能较容易地构建对新知识的理解了。

(二)语言形式、意义、用法相结合的原则

初中阶段的语法教学,应从语言运用的角度出发,把语言的形式、意义和用法有机地结合起来。要引导学生在语境中了解和掌握语法的表意功能。因为语法教学的目的是让学习者具备准确的有意义且得体地使用语法结构的能力。而脱离具体的语境和上下文,句子层次的许多问题是说不清楚的。因此,语法教学要遵循从语篇中来,到语篇中去,即形式、意义、用法相结合的原则。

(三)独立学习与合作学习相结合的原则

独立学习是指学生在教师的指导下独立观察、阅读、思考、操作、质疑问难、搜索、输入和加工信息的过程。合作学习是以学习小组为基本组织形式,系统利用教学动态因素之间的互动来促进学习,以团体成绩为评价标准,共同达成教学目标的活动。学习者以自己的方式建构对于

事物的理解,从而不同的人看到的是事物的不同方面,不存在唯一的标准的理解,通过学习者的合作使理解更加丰富和全面。教育家卡甘提醒教育者:“学生既需要学会如何竞争和如何独立工作,也需要学会如何合作。”

在语法教学过程中,我们同样应该把两种学习方式有机而协调地结合在一起。较小而简单的问题可让学生独立完成,较大而又较难的问题可让学生通过合作完成。如在学习动词-ing形式做状语时,一些单句练习就比较适合让学生独立完成,而让学生归纳所发现的语法规则之类的问题就最好采用合作学习的方式,因为学生在讨论的过程中就能加深对这些规则的理解和记忆,并且能通过讨论借鉴别人的方法。如对动词-ing形式作状语,学生经过讨论总结出下面两种有助于他们对所学内容的记忆和理解的方式:

学生通过独立思考、独立解决问题,培养独立自主能力。结合小组合作学习,使学生在交流、探讨过程中强化对语法概念、规则的理解、记忆,并找到学习语法的正确方法,对语法规则建构起新的更深层、更全面的理解;使学习语法的思路明确化、外显化,这样既可以消除学生学习语法的枯燥感,又可以使学生在比较和讨论中把握语法的规律和特点。因此,我们在进行教学设计时,既要设计独立学习的活动,又要设计合作学习的活动,并明确完成活动的方式,使学生的独立思考和解决问题的能力及与人相处、合作及团结创新的精神都得到培养,并在此过程中建构知识的意义。

(四)传统媒体与现代媒体相结合的原则

新课程改革提倡在教学中运用现代教学媒体并不意味着排除传统媒体的运用,而且两种媒体都有各自的优势,因此,在材料的设计过程中就应注意结合学习材料的特点及其完成方式等因素考虑选用最合适的媒体,这样才能达到媒体为教学服务的目的。以计算机的运用为标志的现代教学媒体具有使教学内容传递速度快、直观化和生动化等优点;而传统教学媒体如黑板、粉笔、挂图、模型等在中小学教学中曾经发挥了重要作用,并仍然具有独特的教育价值。运用这些传统技术和工具的教学应用模式和教学方式仍然具有很强的生命力。如好的板书设计既有利于传授知识,又能发展学生的智力;既能产生美感、陶冶情操,又能影响学生形成良好的习惯;既能激发学生的学习兴趣,又能启迪学生的智慧,活跃学生的思维。可见,传统教学媒体和现代教学媒体在教学中起着不可替代的作用。

语法教学任务的完成方式决定了两种教学媒体结合使用的必要性。因为语法教学需要学生通过独立和合作的学习方式完成学习任务。如考虑到合作学习的有效性,要求学生学习的材料就不能只通过屏幕展示给学生,而必须以文本的形式印发给学生。这样有利于学生进行尝试、交流、讨论;手、口、脑、耳并用,调动学生的各种感官参与。而且,有效的课堂教学是既有预设又有生成的。总结课堂上生成的内容就常用到黑板。另外,答案的呈现、图片等的展示用现代媒体效果更好。可见,要有效地提高教学效率,教学设计必须考虑到两种媒体与教学方法的优化结合。

(五)形成性评价与终结性评价相结合的原则

《课标》明确指出:“评价是英语课程的重要组成部分……通过评价使学生在英语学习过程中不断体验进步与成功,认识自我,建立自信,调整学习策略,促进学生综合语言运用能力的全面发展。评价应能使教师获得英语教学的反馈信息,对教师行为进行反思和调整,不断提高教育教学水平。”因此,评价是教学中不可或缺的一个环节,应该渗透到教学的各个环节及各项教学内容中。在中学英语教学中,不像大学在一个阶段的学习结束后有专项的语法测试评价,中学生

的语法能力评价通常是在考试中通过单项选择题、短文改错、书面表达等方面的综合测试来进行的。因此,中学语法教学评价除通过考试来综合评价外,应更多地采用形成性评价。

在教学设计中要考虑到评价的内容及方式。对学生的学习评价可选择课堂观察、体态语言、语言、提问、师生互动协商、任务完成等方式。如学习动词-ing形式做状语后,可设计以下两个任务让学生选择完成。

这种任务可以诊断学生的笔头输出能力,当然还可设计通过口头完成的任务来检测学生的口头输出能力。另外,根据需要还可设计小组评价和个人评价,小组评价分为组内成员自评、组内成员互评、小组自评。这里所指的个人评价是指对教师的评价,包括学生对教师的评价、教师的自我评价和他人对教师的评价。设计评价时,人们往往想到的是教师对学生的评价和教师的自我评价,却忘了让学生对教师进行评价。教学实践证明,让学生对教师进行评价比教师的自我评价更能让教师发现教学中存在的问题,因为让学生参与对教师的评价,更能促使教师站在学生的角度去考虑和设计问题,而且还能极大地提高学生的参与意识,培养学生的自主、平等意识,事实也证明,这是学生非常乐意做的。

此外,还可以让学生写学习日志的方式来进行评价,学生在学习过程中将自己的学习内容、学习方式和学习反思等进行记录。学习日志可以有效地监控学生的学习,有助于学生自主学习能力的培养。总之,语法教学评价结合中学英语语法教学及评价的特点,形成性评价与终结性评价相结合,并以形成性评价为主,以激励学生学习,帮助学生及时而有效地调控自己的学习过程,使学生获得成就感,增强自信心,培养合作精神。

课堂教学要关注学生的学习过程,以发展学生为指导思想。在教学设计中遵循以上原则,能使学生找到新旧知识的接口,通过独立学习和合作学习的方式亲历尝试、发现、归纳和运用的过程,在原有知识基础上实现知识的主动构建,并且通过在语篇中运用所学新知识,逐步掌握新的语言技能,传统媒体和现代媒体的结合使用增添了语法课堂的活力,而评价使师生双方体验成就并发现不足,不断改进,从而提高课堂教学有效性。

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宇宙无敌的猫

全英文版本的说课稿,对于英语老师来说不过是举手之劳。下面是我给大家整理的英语说课稿范文全英文,供大家参阅!

Good afternoon, everyone. I’m Zhou Yan. I’m an English teacher from Experimental School of Suqian. Now I’ll say Sample A of Lesson Six in Book One. I’ll prepare to say the lesson from four parts.

Part One Analysis of the Teaching Material

(一) STATUS AND FUNCTION

1.This is an important lesson in Book One. From this lesson, it starts asking the Ss to grasp contents of each Sample. To attain “four skills” request of listening, speaking, reading and writing. To start listing “Word Bank” and tell the Ss to remember the new words. To start asking the Ss to write the English sentences well. Therefore this lesson is in the important position of the teaching material.

2.This lesson is the first one of Unit 2.So if the Ss can learn it well, it will be helpful to make the Ss learn the rest of this unit.

3.Such a topic is related to daily life, so it is helpful to raise learning interests of students and it will be also helpful to improve their spoken English.

(二)ANALYSIS OF THE STUDENTS

The Ss has learned English for about one month so far. They can understand some words and some simple sentences. The Ss have taken a great interest in English now.

(三)TEACHING AIMS AND DEMANDS

The teaching aim\'s basis is established according to Junior School English syllabus\' provision.

1.Knowledge objects

(1) To make the Ss know how to use the affirmative sentence “This is. . . .” and the negative sentence “This is not….”Everyday expressions for “Apologies”“I\'m sorry”“That\'s all right”.

(2) To study the new words “six, hey, sorry, it’s, that’s”, etc. by learning the dialogue of this lesson.

(3) To finish some exercises.

2.Ability objects

(1) To develop the Ss’ abilities of listening, speaking, reading and writing.

(2) To train the Ss’ ability of working in pairs.

(3) To develop the Ss’ abilities of communication by learning the useful structures.

3.Moral objects

(1) To enable the Ss to be polite and love life.

(2) To enable the Ss to look after their things well.

(四)TEACHING KEY AND DIFFICULT POINTS

The teaching key and difficult points’ basis is established according to Sample A of Lesson Six in the teaching material\'s position and function.

1.Key points:

(1).To help the Ss to communicate with each other.

(2).To enable the Ss to study in groups and co-operate skillfully.

(3).To develop the Ss’ interest in English.

2.Difficult points:

(1) How to make dialogues and act them out.

(2) How to write the right whole sentences.

(五) TEACHING AIDS

Multi-media computer, Tape recorder, Software: Powerpoint or Authorware, school things and so on. They will be needed in this lesson.

Part Two The Teaching Methods

1. Communicative teaching method

2. Audio-visual teaching method

3. Task-based” teaching method

As we all know: the main instructional aims of learning English in the Middle School is to cultivate students’ abilities of listening, speaking, reading, writing and their good sense of the English language. So in this lesson I’ll mainly use “Communicative” teaching method, “Audio-visual” teaching method and “Task-based” teaching method. That is to say, I’ll let the Ss to get a better understanding of the key structure of the dialogue. I’ll give the Ss some tasks and arrange five kinds of activities: talking, guessing games, watching CAI, acting out Sample A and having a competition.

Teaching special features

To use these methods are helpful to develop the Ss’ thought.

Part Three STUDYING WAYS

1.Teach the Ss how to be successful language learners.

2.Let the Ss pass \"Observation—Imitation—Practice \" to study language.

3.Teach the Ss how to master dialogues and how to communicate with others.

Teaching special features:

Let the Ss communicate with each other and adopt competition methods to develop the Ss’ keen interest in English.

Part Four Teaching Procedure

I’ll finish this lesson in four steps. First I’ll divide the Ss into four groups and bring a competition into the class. At last let’s see which group is the winner.

Step1 Warm-up

1. Free talk between T and Ss .

Such as: Hi, I’m . . . . What’s your name?

This is …. How do you do?

Who is he/she? How are you?

Who can count from 1to 5?

What’s this in English? etc.

2.A game: Ask the Ss to give T some school things. For example:

T: Give me your book.(ruler, box, pen, table, knife, etc.)

T: This is your book. This is not my book. It’s your book. etc.

In this course I’ll ask them to make a dialogue group by group without repetition. Find out which group will make the most dialogues.

Purpose of my designing: I think it is important to form a better English learning surrounding for the Ss by imitating and at the same time it is necessary to provide situations to review learned knowledge.

Step2. Presentation

This course is very important. I’ll mainly talk about this step.

I’ll use CAI to present the whole dialogue. Arrange some situations to help Ss understand Sample A.

First scene: There is a bag on the floor. B is picking it up and get ready to leave. Now A is talking with B.

A: Hi, B. How are you today?

B: I’m fine, thank you. And you?

A: I’m fine, too. Oh, this is my bag.

B: No, this is not your bag. It’s my bag.

A: (Look closely) Oh, I’m sorry.

B: That’s all right.

(At the same time, C is running up and hitting A.)

C: Oh, I’m sorry.

A: That’s OK.

I’ll write the key points on the Bb while they are watching. After watching, I’ll teach them to read the words and sentences on the Bb. Make sure they can read them well.

Purpose of my designing: To present Sample A by CAI is much easier for the Ss to learn and grasp the meanings. CAI can provide a real situation with its sound and picture and it makes the relationships between the Ss better.

Step3.Practice

First play the tape recorder. Let the Ss listen and imitate the dialogue. Pay attention to their pronunciation and intonation. In this step the Ss are required to practise the Sample in pairs by reading the dialogue aloud. This step is employed to make the Ss grasp the Sample .At last I’ll ask the Ss to think hard and act it out with a partner according to Sample A. Then find out which group will act it out well. I’ll give them red stars.

Purpose of my designing: This step is employed to make the Ss get the general idea of the dialogue as a whole one. At the same time let the Ss have a chance to practise their listening and spoken ability.

Step4.Production

In this step I’ll give the Ss a free space to show their abilities.

Second scene: The Ss are having a picnic. It’s hot and they take off their coats and put them together. They are singing and dancing, laughing and chatting. After the picnic, they begin to look for their coats. D and E are talking. F and G are talking. etc.

After watching, I’ll give the Ss some tasks to make similar dialogues without repetition and find out which group will make more dialogues.

Purpose of my designing: “Task-based” teaching method is used here to develop the Ss’ ability of communication and also their ability of co-operation will be well trained. Tell the Ss we should be polite and take good care of our things. We should love our life. I think proper competition can arouse the Ss’ interest in English learning. If the Ss can finish this task well, they will benefit a lot in their spoken English.

2.Skill 1 Model 1.

I’ll ask four Ss of the groups to write these sentences on the Bb in the four lines.

Then check their handwriting, correct their mistakes. Find out who will write well and whose handing is the best.

3.Finish the Ss’ workbook.

Purpose of my designing: To check the knowledge Ss have learned in this lesson.

Step5.Homework:

(1)Recite the words as many as possible after class.

(2)Make a dialogue according to Sample A and write it in the exercise book.

Purpose of my designing: I think homework is so important that the Ss should speak English as much as they can in class or after class. It is necessary for the Ss to do some extensive exercises after class to consolidate the knowledge they learned.

Blackboard Design

Lesson Six Sample ASix This is my….hey This is not your. . . .sorry It’s my. . . . Picture it’s=it is Oh, I’m sorry.that’s=that is That’s all right/OK.

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