高中英語必修3 Unit 4 Reading How Life Begin on the Earth 教學設計
教學目標：
1.讓學生了解地球的形成和發(fā)展
2.讓學生體會并掌握各種閱讀技能和技巧
3.通過文章學習使學生認識地球?qū)θ祟惖闹匾饬x，增強保護地球的意識。
教學重點和難點：
1，通過閱讀了解地球的發(fā)展歷程
2，掌握不同的閱讀技巧，提高閱讀能力
教學過程：
Step 1 Lead-in
Let students do a puzzle ---------the earth
A puzzle
It looks like a ball but you can’t play,
It is our home but so big,
It is round but we usually think it is flat.
It moves anytime but no one feels.
設計說明：展示該謎語，并讓學生齊讀，然后猜出答案--地球。利用齊讀的方式使學生精神振奮，通過猜謎語激發(fā)學生的興趣導入新課。
Step 2 Pre-reading
A. Let students enjoy the beauty of the earth.
B. Questions:
1, How did the earth come into being?
2, In China, there are some stories about the beginning of life.
Do you know? （Pangu & Nuwa）
設計說明：通過圖片讓學生感受地球，產(chǎn)生熱愛地球家園的體驗，同時讓學生產(chǎn)生了疑問，地球是怎么形成的，順利過渡到下一部分。
Step 3 Fast-reading
1, Let students read the text quickly and then answer the following questions.
(1) According to the text, how did the universe begin?
(2) What is the fundamental to the development of life?
(3) Where did life first begin, on the land or in the sea?
(4) Which kind of animal has become the most important animals on the planet today?
設計說明：設計幾個較為簡單卻有關全局的問題，讓學生帶著問題快速搜索所需信息，鍛煉學生快速閱讀的能力。讓學生迅速把握文章的脈絡，為接下來的仔細閱讀活動打下基礎。
2, Let the students read the text again and then finish the following exercise
Para1 a, the development of life
Para2 b, the important of water
Para3 c, the most important animals on the planet
Para4 d, the formation of the Earth
Para5 e, the “Big Bang”
設計說明：在上一活動的基礎上，通過此連線題進一步考察學生在規(guī)定時間內(nèi)把握語篇大意和各段中心大意的能力。
Step 4 Careful-reading
1, Analyzing Read the text and fill in the blanks
How life began on the earth
設計說明：在學生對文章的內(nèi)容已經(jīng)有了比較全面的了解后，用圖表的方式讓學生重新構建文章的主要內(nèi)容。形式簡單、明了，便于知識的掌握和系統(tǒng)化。
2, Reading and answer the following questions.
1. Why was the earth different from other planets?
2. Why did the plants grow before the animals came?
3. Why is it wrong in films and stories to show dinosaurs and people together?
4. What problem is caused by human beings?