優(yōu)秀初中英語(yǔ)微課教案
微課，是指運(yùn)用信息技術(shù)按照認(rèn)知規(guī)律，呈現(xiàn)碎片化學(xué)習(xí)內(nèi)容、過(guò)程及擴(kuò)展素材的結(jié)構(gòu)化數(shù)字資源。下面為大家分享了初中英語(yǔ)微課的教案，一起來(lái)看看吧！
一．教材分析
教學(xué)內(nèi)容
本單元的中心話(huà)題是“克隆”，克隆這個(gè)詞學(xué)生還是很感興趣的，所以課前老師可以叫他們通過(guò)討論和閱讀有關(guān)克隆的內(nèi)容，了解克隆的含義、克隆的技術(shù)發(fā)展、克隆對(duì)人類(lèi)帶來(lái)的好處以及人類(lèi)對(duì)克隆這一問(wèn)題的爭(zhēng)議。閱讀部分介紹了植物與動(dòng)物克隆的區(qū)別、多莉羊的誕生與死亡以及由此引發(fā)的爭(zhēng)論。幫助學(xué)生進(jìn)一步認(rèn)識(shí)克隆的意義在于解決醫(yī)學(xué)上的難題，為人類(lèi)服務(wù)。
教材處理
本科結(jié)合教材的實(shí)際對(duì)教材內(nèi)容、編排順序等進(jìn)行了調(diào)整、刪除和補(bǔ)充，把閱讀前、閱讀中和閱讀后三部分有機(jī)整和起來(lái)。
(1) 導(dǎo)入新穎，激發(fā)興趣�！白x前階段”通過(guò)圖片導(dǎo)入的形式，激活學(xué)生大腦中的圖式。同時(shí)，結(jié)合標(biāo)題預(yù)測(cè)，使學(xué)生對(duì)即將閱讀的內(nèi)容有一定的預(yù)測(cè)，激發(fā)閱讀興趣。
(2) 循序漸進(jìn)、創(chuàng)意安排。“讀中階段”引導(dǎo)學(xué)生進(jìn)行語(yǔ)篇的整體感知，了解課文的概況；培養(yǎng)學(xué)生同義轉(zhuǎn)換及歸納概括的能力。
(3) 適度拓展、開(kāi)發(fā)思維�！白x后階段”拓展學(xué)生的發(fā)散性思維，在訓(xùn)練學(xué)生閱讀技能的基礎(chǔ)上了解克隆這門(mén)生物技術(shù)以及有關(guān)的爭(zhēng)議。
二．teaching goals（教學(xué)目標(biāo)）
target language（目標(biāo)語(yǔ)言）
a．important words and expressions
clone, commercial, producer, undertake, arbitrary, object, forbid, accumulate, cast down, object to, the media, in favour of
b．important sentences
1) but at last the determination and patience of the scientists paid off in1996 with a breakthrough---the cloning of dolly the sheep.
2) altogether dolly lived six and a half years, half the length of the life of the original sheep.
3) the fact that she seemed to develop normally was very encouraging.
4) then came the disturbing news that dolly had become seriously ill.
ability goals （能力目標(biāo)）
enable the students to describe cloning: what is the advantages of cloning? what is the problems or dangers of cloning? what is your opinion of cloning?
learning ability goals（學(xué)能目標(biāo)）
help the students learn how to describe cloning.
三．teaching important points （教學(xué)重點(diǎn)）
how to describe cloning.
四．teaching difficult （教學(xué)難點(diǎn)）
help the students analyze the writing techniques of the article.
五．teaching methods（教學(xué)方法）
skimming, task-based method and debate method.
六．teaching aids（教具準(zhǔn)備）
a recorder, a projector and some slides.
teaching procedures & ways
stepⅰ lead-in
[設(shè)計(jì)意圖]
導(dǎo)入部分由兩個(gè)步驟組成：
首先讓學(xué)生觀(guān)看有關(guān)克隆動(dòng)物和植物的圖片。通過(guò)圖片，學(xué)生們立刻領(lǐng)悟了本課的主題，并帶著興趣開(kāi)始觀(guān)看。
學(xué)生在體驗(yàn)中產(chǎn)生探究的興趣后，為了啟發(fā)學(xué)生思考，設(shè)計(jì)了四個(gè)問(wèn)題，以激發(fā)學(xué)生的思維。
teacher: in pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. think about how they differ.
student: i think the twins and a strawberry plant are natural clones; the dolly sheep and growing new plants are man-made.
after several minutes, teacher ask some questions and let students answer these questions.
teacher: 1. dolly the sheep. it’s the most famous sheep in the world. do you know how dolly is different from other sheep?
student: she was cloned while the others were born naturally. it is the copy of another sheep.
teacher: 2. what can you see in the picture?
student: i can see a strawberry plant producing runners in a natural form of cloning.
teacher: 3.who cut the stem off the plant?
student: a gardener. and the gardener is going to put it into a pot to produce another plant. he is actually making a copy of the plant.
teacher: 4.what do you know about twins?
student: there are twins of the same sex and those of different sexes. the twins here are identical in sex and appearance and are good examples of natural clones. they carry the same genetic information. the fertilized egg has split into two while inside the mother, and so produced two identical human babies.
step ⅱ pre-reading
[設(shè)計(jì)意圖]
通過(guò)閱讀文章標(biāo)題，引導(dǎo)學(xué)生對(duì)課文內(nèi)容進(jìn)行預(yù)測(cè)，調(diào)動(dòng)學(xué)生已有的背景知識(shí)，使其產(chǎn)生閱讀的興趣，快速進(jìn)入閱讀狀態(tài)。然后讓學(xué)生通過(guò)快速閱讀來(lái)驗(yàn)證自己的預(yù)測(cè)，使自身處于一種主動(dòng)認(rèn)知的狀態(tài)。
before class, ask the students to search for some information about this topic. now show my questions on the screen, and then let them discuss with each other.
questions about cloning:
1.what is a clone?
2. how is a clone produced?
3. what benefits can humans gain from cloning?
4. what problems may arise when humans are cloned?
suggest answers:
1. a clone is an animal or plant produced naturally or artificially from the cells of another animal or plant and is exactly the same as it.
2. the cloning of plants is simple and relativity easy. it can be done by taking cuttings (man-made cloning) or letting the plant produce its own runners (natural cloning). the cloning of animals is more complicated. it was not achieved until 1996 and is fully explained in the first reading.
3. 1) medical cloning can help cure serious illnesses that ruin one’s quality of life (such as parkinson’s disease帕金森癥 or alzheimer’s disease老年癡呆癥).
2) it can help infertile people have babies.
4. 1) people may want to clone themselves so they can live forever.
2) people may want to clone dead children.
3) people may want to clone their favorite pets.
step ⅲ while-reading
teacher: now let’s listen to the tape. then i will give you 20 minutes to read this passage again. while reading , you should finish the following three tasks.
task 1 summarize the main idea of each paragraph.
[設(shè)計(jì)意圖]
學(xué)生通過(guò)略讀本文，快速找出每段的主題句，從整體上把握文章內(nèi)容，不但了解此類(lèi)型文章的篇章結(jié)構(gòu)，學(xué)習(xí)此類(lèi)型文章的寫(xiě)作，而且便于下一步查讀。
para 1. cloning is a way of making an exact copy of another animal and plant.
para 2. cloning has two major uses.
para 3. the birth and death of dolly.
para 4. the effect of dolly.
para 5. it is forbidden to clone human beings.
task 2 read the text carefully and fill in the blanks.
[設(shè)計(jì)意圖]
學(xué)生個(gè)人先通過(guò)查讀，快速找到特定信息，然后小組組員之間交流各自的答案，有疑義的地方，經(jīng)過(guò)討論，最終確定答案。這不僅讓學(xué)生了解文章的具體內(nèi)容，而且培養(yǎng)學(xué)生閱讀的能力和互幫互助的團(tuán)隊(duì)合作精神。
task 3 choose the best answer.
[設(shè)計(jì)意圖]
在閱讀的'過(guò)程中，讓學(xué)生結(jié)合文章對(duì)這些問(wèn)題進(jìn)行思考。一方面，可以培養(yǎng)學(xué)生的綜合閱讀能力，另一方面，加強(qiáng)學(xué)生對(duì)文章的進(jìn)一步理解。
1). the main idea of the text is____
a. animal cloning is very valuable and can benefit the world.
b. animal cloning could be misused by bad people so it must be forbidden
c. animal cloning is well developed because dolly the sheep was born.
d. animal cloning raised arguments and scientists are not sure about its future.
2). ________ is used in the procedure for cloning dolly the sheep.
a. the nucleus of sheep a
b. the somatic cell of sheep a
c. the nucleus of sheep b
d. the embryo of sheep c
3). the cloning of dolly the sheep succeeded because____. a. its easier to clone a sheep than other animals b. the scientists were determined and worked hard with patience
c. the scientists were rewarded and got lots of money
d. many other attempts to clone mammals failed
4). the lamb is the clone of the cell from sheep because_____. a. it provides the egg cell b. it gives birth to the lamb c. it provides the nucleus d. it is a female sheep
5). dolly the sheep-----------.
a. looked exactly like the sheep that provides the egg
b. was the exact copy of the sheep that provides the nucleus
c. looked like the sheep that gave birth to it
d. had the characteristics of all three sheep
6). it can be inferred from the passage that a cloned animal ----------.
a. usually lives as long as the original one
b. usually lives longer than the original one
c. usually dies earlier than the original one
d. is usually as healthy as the original one
7). which of the following is wrong?
a. cloned people would live forever.
b. cloned people may be killed at will for medical aid.
c. a woman would have difficulty recognizing her real husband.
d. men will die out because a woman can give birth to a baby without a husband
8). the sheep that donated the somatic cell most probably lived ____ years. a. 3 b. 6 c. 12 d. 13
9). which of the following is not an advantage of cloning?
a. cloning can be used for medical purposes.
b. large quantities of food can be produced by cloning.
c. famous persons who have passed away can be cloned.
d. cloning can help keep animals from becoming extinct.
10). in the second paragraph, the word “straightforward” means ____.
a. uncomplicated b. honest c. frank d. difficult
step ⅳ post-reading
[設(shè)計(jì)意圖]
學(xué)生已經(jīng)通過(guò)略讀、查讀和細(xì)讀，抓住了文章脈絡(luò)，理解了文章內(nèi)容。在此基礎(chǔ)上，要求 更深一步理解文章，因此設(shè)計(jì)了幾道習(xí)題，進(jìn)一步培養(yǎng)和考察學(xué)生的閱讀理解能力。
exercise 1 the following statements are about cloning. read them and decide if they are true or false. write the letter “t” if the statement is true. write “f” if it is false.
1). cloning means making a copy of an animal or a plant. (f)
2). gardeners can make a lot of money by cloning plants. (t)
3). cloning animals is as complicated as cloning plants. (f)
4). dolly the sheep was the first successful clone of a mammal. (t)
5). natural clones happen in animals as well as in plants. (t)
exercise 2 read the passage again and answer these questions.
1). what are the two major uses of cloning?
2). why is it easier to make commercial plant clones than animal clones?
3). what was the first clone from an adult animal? at what age did this clone die?
4). why is cloning controversial in some countries?
step ⅴ language points
[設(shè)計(jì)意圖]
使學(xué)生理解和掌握一些重點(diǎn)詞匯的用法，進(jìn)一步培養(yǎng)使用英語(yǔ)語(yǔ)言的能力，并加深對(duì)文章的理解。
1. identical adj.
�、� (常與with連用) 完全相同的
eg. these two designs are almost identical.
my opinion is identical with his.
②還有“同一的，同樣的”的意思
eg. we are identical in our views of what should be done.
2. cast down :feeling unhappy and depressed (多用于被動(dòng)結(jié)構(gòu)或做表語(yǔ)) 沮喪；低沉。
eg. he was much cast down by the failure of the experiment.
anyone would be cast down by news such as that.
3. forbid vt.
[詞義] vt. (to command someone not to do something) 禁止,不準(zhǔn)
[常用搭配] forbid sth/doing sth 禁止(做)某事 forbid sb to do sth 禁止某人做某事 forbid that … 禁止……
[反義詞] allow 允許,準(zhǔn)許
allow sth/doing sth 允許(做)某事
allow sb to do sth 允許某人做某事
eg. the law forbids the sale of cigarettes to people under the age of 16.
the law forbids building on this land.
4. accumulate
vt. 收集，堆集
eg. he accumulated fortune by hard work.
the purpose of education is not just accumulating information.
vi.
eg. dust accumulated during my absence.
歸納拓展：
accumulate可作及物動(dòng)詞和不及物動(dòng)詞，表示: 收集, 聚集, 堆積。
另外 accumulation n. 積聚
如: the accumulation of knowledge 知識(shí)的積聚
step ⅵ homework
[設(shè)計(jì)意圖]
受課堂時(shí)間的限制，學(xué)生對(duì)課文的理解有限，因此布置學(xué)生課后再閱讀課文，并且讓學(xué)生對(duì)克隆這一現(xiàn)象進(jìn)行評(píng)價(jià)，歸納出克隆的好處以及克隆存在的問(wèn)題
what are the advantages and disadvantages of cloning?
complete the exercises on page 13
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