第四教时（精选7篇）

“蔓磊沐”通过精心收集，向本站投稿了7篇第四教时，以下是小编帮大家整理后的第四教时，仅供参考，欢迎大家阅读。

篇1：第四教时

教材：全集与补集目的：要求学生掌握全集与补集的概念及其表示法过程：一 复习：子集的概念及有关符号与性质。提问（板演）：用列举法表示集合：a={6的正约数}，b={10的正约数}，c={6与10的正公约数}，并用适当的符号表示它们之间的关系。解： a={1，2，3，6}， b={1，2，5，10}， c={1，2}    cía，cíb二 补集1．实例：s是全班同学的集合，集合a是班上所有参加校运会同学的集合，集合b是班上所有没有参加校运动会同学的集合。集合b是集合s中除去集合a之后余下来的集合。结论：设s是一个集合，a是s的一个子集（即 ），由s中所有不属于a的元素组成的集合，叫做s中子集a的补集（或余集）scsaa记作： csa     即 csa ={x | xîs且 xïa}2．例：s={1，2，3，4，5，6}  a={1，3，5}   csa ={2，4，6}  三  全集     定义： 如果集合s含有我们所要研究的各个集合的全部元素，这个集合就可以看作一个全集。通常用u来表示。     如：把实数r看作全集u, 则有理数集q的补集cuq是全体无理数的集合。  四  练习：p10（略）  五  处理 《课课练》课时3  子集、全集、补集 （二）  六  小结：全集、补集  七  作业  p10  4，5           《课课练》课时3  余下练习

篇2：高一英语第四单元第四教时教学设计

武进高级中学

Period Four (Language and Grammar)

A.Free talk

B.Language study

Task 1. Understand words in different situations

Word study about “advance”and “strike” (individual work)

Judge the different meanings of “advance”or “strike” in the following sentences:

1. The hunter advanced toward the bear carefully.

2. A month has passed but the project has not advanced.

3. He worked so well that his boss advanced him to a higher position.

4. The date of the meeting was advanced form June 10 to June

5. The boy struck the pig with a stick.

6. The workers were striking for higher pay.

7. Typhoon Swan struck Hainan, killing 20 people.

8. On New Year’s Eve, we waited for the clock to strike.

Task 2. Finish the exercises in the text.

Task 3. Talk about people and things using Attributive Clause

First, let students find out some words about things quickly like clock, homework, coat, chocolate, bat, flood, fire, etc from the exercise of word study and describe them as the following example: (pair work)

A clock is a machine that/ which tells time.

Second, let students find out some words about persons quickly such as teacher,

parents, doctor, mother, child, soldier and thief and describe them like this: (pair work)

A teacher is a person who/ that teachers you how to learn.

Third, finish Exercise 2 of Grammar orally. (individual work)

Task 1. Expanded reading

Read the following passage about fire and find out the Attributive Clauses in it and try to understand the use of the relative pronouns. (individual work)

The Great Fire of London that lasted four days started in the very early hours of 2nd September 1666, which destroyed over three-quarters of the old city. 100,000 people whose houses were wooden became homeless.

The fire began in the house of the King’s baker in Pudding Lane. The baker, who could not put out the fire, got out through a window in the roof. A strong wind blew the fire from the baker y into a small hotel next door, which ten spread quickly into Thames Street.

The next day nearly a kilometer of the city was burning along the River Thames. Many people threw their things into the river. Many poor people whom nobody cared stayed in their houses until the last moment. The fire also destroyed many buildings which had a long history and were famous at home and abroad. The fire stopped only when the King finally ordered people to destroyed hundreds of buildings in the path of the fire.

1. Which of the following can be inferred to the main cause that made the fire spread so quickly?

A. The baker set the fire.

B. The baker’s house was made of wood.

C. Wooden houses were too close to each other.

D. The wind was so strong.

2. What would the King do after the fire?

A. Kill the baker.

B. Give the homeless some money.

C. Leave London.

D. Rebuild London.

Task 2. Finish Exercise 1 of Grammar. (individual work)

Task 3. Homework

Preview the next reading material and find out the Attributive Clauses with who, whom, that, which, whose, where and compound sentences with and, but.

篇3：高一英语第四单元第二教时教学设计

武进高级中学

Period Two (Speaking)

Aims:1.Learn how to offer other people help, comfort and his particular opinions.

2.Describe people, things, events and people’s feelings.

3. Talk about past experiences.

Retell the story in their own words.

Teaching Design

A. Pre-dialogue

Task 1. Free talk

Task 2.Revision

Questions:

1. Do you remember the person who was caught in an earthquake?

2.What happened to him in the earthquake?

3. What difficulties does he have now in his life?

4. If you are his friend, how will you encourage him and what advice would you offer him?

e.g Don’t worry/ Don’t be afraid/ It will be OK/ You can do it/ Come on/ Keep trying….

Task 3 Make up a dialogue according to the situation

A is having some difficulty in learning English,

B is helping him.

B. While-dialogue

Task 1: Learn the dialogue

1. Listen to the dialogue.

2.Find out all the expressions about offering help, encouraging others and giving advice (Well done/ Just try/ That was a very good ball.)

Task 2: Mechanical Practice( pair work)

1.Act the dialogue out.

Task 3 Practice

The teacher presents three situations, and let some students act as Mother to encourage her child, using the above useful expressions.

Situation 1: A little child is learning to walk, his mother is ahead of him.

Situation 2: A schoolgirl is disappointed because she failed to pass the exam.

Situation 3: A young boy is very sad at his dead pet.

C. Post-dialogue

Task 1: Make dialogues according to the following situations (pair work):

Situation 1: You have just been saved from a terrible earthquake and you are worrying about your family.

Situation 2: Your neighbour will take care of your pet while your are on holiday.

Situation 3: Your house is on fire, but there is a little girl sleeping in bed on the second floor.

Task 2.Performance

Four students act as psychologists. They are good at dealing with the problems on life and study, such as having sports, making friends, getting along with parents and keeping healthy. Let students speak out freely and ask one of them to give them some advice.

Task 3. Homework:

Collect the information about natural disasters and describe them. (work in group of four)

篇4：《牛津小学英语5A》第八单元第四教时教学计划参考

《牛津小学英语5A》第八单元第四教时教学计划参考

一、教学目标：

1、进一步巩固本单元句型What do you / they have? I/ We/ They/ have…

What does he/ she have? He/ She has …

2、能正确地听、说、读、写词汇fat, thin。

3、能初步了解字母i在单词中的读音。

4、能根椐图示语完成面具的制作。

5、能较熟练地在情景中运用本单元所学的句型和日常交际用语。

二、教学重点：

1、能综合运用本单元所学过的单词、句型和日常交际用语。

2、能初步了解字母i在单词中的读音。

三、教学难点：

1、掌握字母在单词中的'读音。

2、能将所学的句型运用于具体情景的对话或短文中。

四、课前准备：

1、录音机和短文录音磁带。

2、学生准备纸、水彩笔和剪刀、线。

3、单词、音标卡片。

4、学生准备同学或父母、朋友的照片。

5、学生预习课文E部分内容。

五、教学过程：

A.Warm up

老师与学生谈论天气和提议出去游玩：What day is today? What’s the weather liketoday? Let’s have a trip. It’s great. Boys and girls. What do you have?

学生四人一组表演对话，复习句型：I / We/ You / They have …

What do you / they have?

B.Revision

1、老师出示幻灯片：其他一位老师的照片

T: Who’s the woman? S: She’s Miss *. She’s our Chinese teacher.

T: Good. Look, she has big eyes and small mouth. She has long hair.

2、请学生拿出自己准备的照片，介绍同学、老师、父母或朋友的特征，来操练has的用法，并与have进行区别。其中引出生词：fat, thin

3、选出最佳介绍者，予以表扬。

C. Make and say

1、让学生拿出纸、笔、剪刀和线，先请学生看图和指示语，理解面具的制作过程。

2、个别学生读出对面具制作的描述。

3、老师说指令，学生进行制作。

4、比一比，赛一赛，哪一组学生制作好的面具多。（限定时间）

5、请学生简短地描述一下自己制作好的面具。

D. Read the passage

1、听课文录音，初步理解短文内容。

2、学生跟读录音，并回答问题：What do they have? (A lot of toys.)

What does the girl have? (A bear.)

What does her brother have? (A panda.)

What does her sister have? (An elephant. 生词操练elephant)

What does Tom have? (A monkey.)

What does his brothers have? (Six dogs.)

3、小组活动，学生展示自己带来的玩具或其他物品，通过句型操练描述这些物品的特征。

4、学生交流。

E. Listen and repeat

1、出示幻灯片：一只大冰箱

T: What can you see in the picture? (A fridge.)

T: What’s in the fridge? (A box of milk.)

T: Can you spell “milk”?

S: Yes, I can. M-i-l-k.

学生说出fish, chicken …

2、学生听录音后跟说单词和句子。在说的过程中让学生体会元音字母i在单词中的发 音[ i ]。

3、再让学生说出一些单词中i发[ i ]词。如：is, it, sing, big, picture,m, sit, with …

F. Assign homework

1、默写本单元四会要求的句子和单词。

2、完成练习册E、F部分内容。

篇5：Unit3 What are you going to do?第四课时教

Unit3 What are you going to do?第四课时教学反思

一、导入、呈现新内容较自然

在本节课中，我从轻松愉快的chant引入通过chant 引出主要句型同时复习大量的动词短语为本课所学的内容及拓展做好准备.让学生站起来，你说我说大家说，提高自信心 自由问答，有效激发学生的学习兴趣和信心！通过游戏Guessing增强学习的趣味性，自然导入新课。 二、自主学习，发挥学生的表演才能，在真实的情景中灵活的运用英语。

英语作为一门语言，应体现它的交际功能，我一贯认为学生会应用英语是关键。给学生自由发挥的`空间，通过小组合作学习新的语言，互相帮助努力完成共同的任务。通过小组之间的竞争有效激发他们的学习热情。让他们充分的发挥想象，运用所学的内容自编自演谈话场景。这样学生可以活学活用英语，同时也培养了学生的表演才能。有的学生极有想象力和创造力，能够有一些新点子自创情境，而且往往不局限于本节的内容。学生的表演的成功与否是我教学的落实与否的一大衡量标准。

篇6：第八教时

第八教时教材：交集与并集（3）目的：复习交集与并集，并处理“教学与测试”内容，使学生逐步达到熟练技巧。过程：一、复习：交集、并集二、1．如图（1） u是全集，a，b是u的两个子集，图中有四个用数字标出的区域，试填下表：       区域号  相应的集合    1cua∩cub2   a∩cub3   a∩b4cua∩b集合   相应的区域号    a   2，3b     3，4u  1，2，3，4a∩b     3               a   23b 411u8 c6 7b 4532 a1                     u

图（1）                                       图（2）2．如图（2） u是全集，a，b，c是u的三个子集，图中有8个用数字标出的区域，试填下表： （见右半版）    3．已知：a={(x,y)|y=x2+1,xîr}  b={(x,y)| y=x+1,xîr }求a∩b。       解：                       ∴ a∩b= {（0，1），（1，2）}       区域号相应的集合 1cua∩cub∩cuc2a∩cub∩cuc3a∩b∩cuc4cua∩b∩cuc5a∩cub∩c6a∩b∩c  7cua∩b∩c8cua∩cub∩c集合相应的区域号 a2，3，5，6b3，4，6，7c5，6，7，8∪1，2，3，4，5，6，7，8a∪b2，3，4，5，6，7a∪c 2，3，5，6，7，8b∪c 3，4，5，6，7，8三、《教学与测试》p7-p8 （第四课）  p9-p10 （第五课）中例题     如有时间多余，则处理练习题中选择题四、作业： 上述两课练习题中余下部分

篇7：第七教时

第七教时教材：交集与并集（2）目的：通过复习及对交集与并集性质的剖析，使学生对概念有更深刻的理解过程：一、复习：交集、并集的定义、符号          提问（板演）：（p13  例8 ）设全集 u = {1，2，3，4，5，6，7，8}，a = {3，4，5} b = {4，7，8}求：（cu a）∩(cu b),  (cu a)∪(cu b),  cu(a∪b),  cu (a∩b)解：cu a = {1，2，6，7，8}      cu b = {1，2，3，5，6}(cu a)∩(cu b) = {1，2，6}  (cu a)∪(cu b) = {1，2，3，5，6，7，8} a∪b = {3，4，5，7，8}    a∩b = {4}∴ cu (a∪b) = {1，2，6}    cu (a∩b) = {1，2，3，5，6，7，8，}结合图                       说明：我们有一个公式：uab(cua)∩( cu b) = cu(a∪b)(cua)∪( cub) = cu(a∩b)二、另外几个性质：a∩a = a,   a∩φ= φ,   a∩b = b∩a,a∪a = a,   a∪φ= a ,   a∪b = b∪a.（注意与实数性质类比）例6  （ p12 ） 略进而讨论 (x,y) 可以看作直线上的点的坐标a∩b 是两直线交点或二元一次方程组的解同样设 a = {x | x2-x-6 = 0}     b = {x | x2+x-12 = 0}    则 (x2-x-6)(x2+x-12) = 0 的解相当于  a∪b即： a = {3,-2}     b = {-4,3}      则 a∪b = {-4,-2,3}三、关于奇数集、偶数集的概念       略  见p12例7 （ p12 ）  略练习  p13四、关于集合中元素的个数规定：集合a 的元素个数记作： card (a)ab   作图                     观察、分析得：card (a∪b) ¹ card (a) + card (b)        card (a∪b) = card (a) +card (b) -card (a∩b)五、（机动）：《课课练》  p8   课时5 “基础训练”、“例题推荐”六、作业： 课本   p14     6、7、8           《课课练》  p8—9    课时5中选部分