教學(xué)設(shè)計(jì)Step 1 Teaching aims 1, Improve the listening and speaking skills. 2, 學(xué)習(xí)完成任務(wù)所需要的語(yǔ)言 3，學(xué)會(huì)含有大數(shù)字的度量結(jié)構(gòu)的表述，并掌握用不同的句式表達(dá)比較級(jí)和最高級(jí)。Step 2 Preparations PPT, I Have a Dream 視頻Step 3 Key points and difficulties 1, 學(xué)習(xí)并掌握表達(dá)物體的長(zhǎng)、寬、高、深和面積。正確運(yùn)用形容詞和副詞的比較級(jí)和最高級(jí) 2，學(xué)會(huì)含有大數(shù)字的度量結(jié)構(gòu)的表述。 3，提高聽說(shuō)能力。Step 4 Teaching process 1, Leading in 出示四張圖片，讓學(xué)生認(rèn)識(shí)四個(gè)圖片所代表的地區(qū)。 2, PresentationQuestions1a (1) Look at the four pictures. Match the facts you know. (2)Check the answers.Listening1b (1) Ask students to listen to the tape carefully. (2) Check the answers. (3) Key points: 比較級(jí)+than any other +n.(單)=最高級(jí)+n.(單)Practice1c (1) T: What is the biggest desert in the world? S: The Sahara. T: How big is it? S:Its about 9,600,000 square kilometers in size 以此對(duì)話為依據(jù)進(jìn)行小組活動(dòng)，用所給的圖片和詞組編對(duì)話。 (2) 教師制定小組進(jìn)行對(duì)話表演Listening2a2b (1) Ask students to listen to the tape carefully. (2) Check the answersRole-play the conversation (1)Ask student to read the conversation in pairs. (2)Translate the conversation. (3)Key points: feel free to do sth. 一種口語(yǔ)表達(dá)，無(wú)拘束做某事，按照自己的意愿做某事。 As far as I know固定表達(dá)，“據(jù)我所知” 3, Practice 4, Sum up Words and phrase: square, meter, deep, desert, population, Asia, feel free, tour, tourist, wall, amazing, ancient, protect, wide,as far as I know. Sentences: How big/high/long is .? What is the +最高級(jí)+n.+in the world? 形容詞比較級(jí)+than any other +n.(單) =形