資源簡介

Unit 2 Saving the Earth Topic 2 Section A（教學(xué)設(shè)計）
Ⅰ. Material analysis
本課主活動是1a。1a通過Maria向他的同伴Kangkang和Jane抱怨天氣，引出本課的功能意念：抱怨和責(zé)備。同時也初步呈現(xiàn)了本單元的語法點：不定代詞和不定副詞。1b主要培養(yǎng)聽力策略，即重點聽對話的大意。1c側(cè)重于考查歸納總結(jié)的能力。在2中，通過“用所給詞的正確形式填空”這種題型，鞏固1a中的重點語言點。借助3的圖片和信息提示，進(jìn)一步形象地了解沙塵暴形成的過程。通過4的聽力練習(xí)，提高學(xué)生聽取文段細(xì)節(jié)的能力。本課通過談?wù)撋硥m暴的成因說明了樹木對環(huán)境保護(hù)的重要作用。同時也讓學(xué)生了解天氣與人類活動的關(guān)系，關(guān)注全球的環(huán)境問題。
Ⅱ.Teaching aims
1.Knowledge aims：
掌握本課的重點詞匯和短語，談?wù)撋硥m暴的成因。
初步感知不定代詞和不定副詞的用法。
2.Skill aims:
能聽懂談?wù)撋硥m暴成因的對話。
能夠從所聽材料中獲得有效的細(xì)節(jié)信息。
能夠根據(jù)圖片和信息提示詞描述沙塵暴形成的過程。
3. Emotional aims: (optional)
讓學(xué)生了解環(huán)境污染的嚴(yán)峻形勢，引導(dǎo)學(xué)生愛護(hù)大自然，愛護(hù)花草樹木，樹立綠色環(huán)保意識。
4. Culture awareness: (optional)
通過課文的學(xué)習(xí)，讓學(xué)生了解沙塵暴形成的原因和過程，關(guān)注全球的環(huán)境問題。
Ⅲ. The key points and difficult points
1. Key points:
Words and phrases: sand, although, sandstorm, desert, human being, reduce, completely, change into, stop … from, blow/ wash … away, as a result
Sentences: A lot of water can be saved by forests.
Although there were sandstorms before, now we have built “The Green Great Wall”.
Grammar: Indefinite pronoun and adverb.
Difficult points：
能夠從所聽材料中獲得有效的細(xì)節(jié)信息來補全句子。
能夠根據(jù)圖片和信息提示詞描述沙塵暴形成的過程。
Ⅳ. Learning strategies
通過引導(dǎo)學(xué)生在聽前閱讀1b和3，培養(yǎng)學(xué)生形成聽前熟悉、預(yù)測聽力材料的學(xué)習(xí)習(xí)慣。
通過3中的插圖預(yù)測并描述新話題，培養(yǎng)學(xué)生的邏輯推理能力。
Ⅴ. Teaching aids
關(guān)于沙塵暴的視頻和圖片，錄音機，幻燈片等。
Ⅵ. Teaching procedures
Stage(time period) Interactionpatterns Teacher activity Student activity Remarks
1 Getting students ready for learning（3 mins) Class activity Play a short video about a sandstorm and let Ss guess what kind of weather it is.T: Hi, boys and girls! It’s a fine day, isn’t it Ss: Yes.T: Now watch the short movie and guess what kind of weather it is …T: Can you tell me what the weather is Ss: Yes, 沙塵暴.T: Right. We call it “sandstorm”. It’s a kind of storm caused by sand. So we call it sandstorm. Now read after me, “sand” “sand”.(Point to a scene in the video.)Ss: “sand”, “sand”T: “storm”, “storm”Ss: “storm”, “storm”T:“sandstorm”,“sandstorm” Watch a video about a sandstorm and guess what kind of weather it is. Ss: Yes.Ss: Yes, 沙塵暴.Ss: “sand”, “sand”T: “storm”, “storm”Ss: “storm”, “storm”Ss: “sandstorm”, “sandstorm” 通過播放與沙塵暴相關(guān)視頻，進(jìn)入本課話題，從視覺，聽覺等方面感知沙塵暴這種惡劣的天氣現(xiàn)象，為了解環(huán)境問題做好準(zhǔn)備。教師在教讀單詞時，注意使用升調(diào)和降調(diào)，配上手勢，培養(yǎng)學(xué)生的語音語調(diào)。
2 Lead-in (3 mins) Group work Show the pictures of a sandstorm, let the Ss guess how sandstorm comes into being and number the pictures in 3.T: OK, do you know how sandstorm comes into being Please look at the pictures, discuss and number them in groups.…T: OK, how does the sandstorm come into being Tell me the right order, please.S1: It’s 4-1-5-3-6-2. Look at the pictures about a sandstorm, guess how sandstorm comes into being and number the pictures in 3.…S1: It’s 4-1-5-3-6-2. 先處理3部分，簡單描述沙塵暴形成的過程，讓學(xué)生對這種天氣，有所了解，然后在進(jìn)入1a，詳細(xì)談?wù)撋硥m暴形成的原因以及樹木的功能，這樣，讓課堂環(huán)節(jié)更加流暢。
3 Pre-listening (5-7 mins) Group work Let the Ss talk about sandstorm according to the pictures and the given words in 3 in groups.T: Yeah, you are right. With the help of pictures and the words below, can you talk something about sandstorm Ss: Yes.T: Now discuss with your group members.…T: OK, who can try S1: Long ago, there were lots of trees and forests. But people needed some wood to build houses and do other things, so they cut down the trees day by day. And the forests have gone slowly…S2: … Talk about sandstorms according to the pictures and the given words in 3.Ss: Yes.S1: Long ago, there were lots of trees and forests. But people needed some wood to build houses and do other things, so they cut down the trees day by day. And the forests have gone slowly…S2: … 引導(dǎo)學(xué)生通過圖片和短語提示，正確排列圖片順序，對沙塵暴形成的過程進(jìn)行描述，訓(xùn)練學(xué)生連詞成句，連句成片的能力。為了降低難度，可以這樣操作：先讓小組內(nèi)的每個成員根據(jù)提示詞寫一個或者幾個相關(guān)的句子，再一起將這些句子串起來，最后注意加上正確的連接詞。在展示環(huán)節(jié)，可以讓學(xué)生以小組為單位，一起上臺做一個關(guān)于沙塵暴的presentation，展示小組合作的成果，體現(xiàn)小組的風(fēng)采。
4 While-listening (8 mins) Individual workPair work Step 1: Present a picture of the sandstorm and the picture in 1a. Let the Ss listen to 1a once and do 1b alone.T: Right. Now look at this picture. What’s the weather like S1: It’s a sandstorm. T: How do you like the weather S2: I think it’s terrible.T: People can’t see things clearly. And it’s bad for our health. Now listen to the tape and choose the best answer in 1b. When you are listening, pay attention to the main idea.…T: Now please check answers. The boy and girls are talking about…S1: B, the reasons for sandstorms.…Step 2: Let the Ss listen to 1a again and complete the functions of trees in 1c. They can discuss in pairs.T: Listen to 1a again and find the functions in 1c.…T: What are the trees’ functions S1: Trees can stop the wind from blowing the earth away.S2: Trees can also stop the water from washing the earth away. Look at two pictures, listen and choose the best answer in 1b. .S1: It’s a sandstorm. S2: I think it’s terrible.S1: B, the reasons for sandstorms.…Read and complete the functions in 1c. Discuss in pairs.S1: Trees can stop the wind from blowing the earth away.S2: Trees can also stop the water from washing the earth away. 通過課文插圖，引導(dǎo)學(xué)生預(yù)測課文內(nèi)容，為完成聽力降低難度。1b的聽力是抓對話的主題，不能直接找到主旨句，而是要通過歸納的方式得出，如果教師提示學(xué)生用“排除法”，可以幫助學(xué)生作出正確的選擇。如果學(xué)生基礎(chǔ)較好，也可以將1c調(diào)整成聽的活動，學(xué)生能夠找到答案，但會很難記下來。因此，可以用聽讀結(jié)合的方式，先聽兩遍，記下關(guān)鍵詞，再通過朗讀，檢查答案。
5 Post-listening (10 mins) Group work Group workClass activity Step 1: Let the Ss read 1a in groups and then role play it.T: Read 1a with your group members and act it out.Step2: Let the Ss read again and find the important phrases in 1a. Then write them down on the Bb.T: Now read 1a sentence by sentence, underline the important phrases and then write them down on the Bb behind.…T: OK, let’s look at your notes. No.1, “change into”. Who can tell us its meaning S1: It means “turn into”.T: Right. Who can make a sentence with it S2: We can change ice into water.T: Wonderful! If your group also has this phrase, please tick it out. Now next one, “stop…from doing sth.” Who can make a sentence with it S3: …(Teach other phrases in the same way.)Step 3: Lead the Ss to complete the sentences with the correct forms of the given phrases in the box in 2.T: OK, we have learnt the key phrases. Now let’s fill in the blanks in 2 with the correct forms of the phrases.…T: Let’s check.S1: People have cut down such a large number of trees that the land has changed into desert.S2: …, so the wind always blows the earth away.S3: …, so we must do something to reduce it.S4: …S5: … Read 1a in groups and then role play it. Read 1a sentence by sentence, and underline the important phrases.S1: It means “turn into”.S2: We can change ice into plete the sentences with the correct forms of the given phrases in the box in 2.S1: People have cut down such a large number of trees that the land has changed into desert.S2: …, so the wind always blows the earth away.S3: …, so we must do something to reduce it.S4: …S5: … 在處理知識點時，教師要讓學(xué)生自己去發(fā)現(xiàn)重難點，這有助于學(xué)生調(diào)整復(fù)習(xí)方向。如果他們組呈現(xiàn)的都是本課的重點知識，教師要給予肯定和鼓勵。在講解過程中，注意綜合所有小組的重點，并讓學(xué)生自己想辦法解決，通過造句等方式在情境中來運用該知識點。在處理完課文知識點后，檢驗學(xué)生學(xué)習(xí)情況最好的方式就是做題，本課2，就是對1a知識點的鞏固訓(xùn)練和學(xué)習(xí)情況的檢測，也是提高學(xué)生綜合運用語言的能力。
6 Finishing Task 4 (10 mins) Class activity Lead the Ss to look at the phrases. Listen to the passage and circle the phrases you hear. Then listen twice to complete the sentences. Finish 4.T: Look at these phrases, what’s the meaning of “become weaker” S1: It means “變得更虛弱” in Chinese.T: Right. How about “destroy the environment” S2: It means “破壞環(huán)境”.…T: Now listen carefully and circle the phrases you hear....T: OK, now check the answer together. Which phrases did you hear S41…S5……T: Well done. Now listen again and fill in the blanks. When listening, you can only write the first two letters of each word. After finishing listening, you have some time to complete your answers. Ready …T: OK. It’s a bit difficult. So you have one more minute to complete the sentence and pay attention to the forms of verbs.…T: Let’s check the answers together.S6: Now some kinds of animals are becoming…S7: Some animals are … dying out completely.S8: … and had … food. Look at the phrases, listen and circle for the first time. Then listen twice to complete the sentences. Finish 4.S1: It means “變得更虛弱” in Chinese.S2: It means “破壞環(huán)境”.S41 …S5……S6: Now some kinds of animals are becoming…S7: Some animals are … dying out completely.S8: … and had … food.… 聽力4的B部分較難，教師指導(dǎo)學(xué)生在做“填空類”聽力題時注意策略：聽前，可以帶領(lǐng)學(xué)生根據(jù)題目預(yù)測聽力內(nèi)容，降低難度；聽時，先把握句子的整體意思，只需要寫出單詞的前兩個字母就行；聽后，結(jié)合語境，將句子補充完整（如果是動詞短語，要特別注意時態(tài)，如果是名詞，要注意單復(fù)數(shù)形式，如果是形容詞等，則要關(guān)注詞性的變化）。
7 Summarizing and Assigning homework (3 mins) Class activity Step 1: Sum up what they have learnt in this class.T: Please work in pairs.Tell your partner what we have learned today including words, phrases and sentences. S1: change intoS2: stop … from …S1: wash … away …S2: blow … away ……Step 2: HMK: Write a passage about how sandstorm comes into being. Sum up what they have learnt in this class. Tell their partner what they have learned today including words, phrases and sentences. S1: change intoS2: stop … from …S1: wash … away …S2: blow … away …Write a passage about how sandstorm comes into being according to 3.
Ⅶ. Blackboard design
All these problems are very serious.Section A
Words:sand / sandstormalthoughdesertreducecompletely Phrases:change intostop … fromblow/ wash … awayhuman beingas a result Sentences:1. A lot of water can be saved by forests.2. Although there were sandstorms before, now we have built “The Green Great Wall”.
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