Unit 6 The Story of Rain A Let’s talk
教學目標：1.知識與技能：
（1）學生能夠聽、說、讀、寫“where does the rain come from? it comes from the clouds”。并能替換運用于水循環的整個過程。
（2）能夠將這個句型運用到生活中。
2.過程與方法：
通過實驗觀察，讓學生對水循環的過程更加明了，學習“where does the rain come from? it comes from the clouds”句型。通過師生對話、小組間對話、同桌對話等形式來練習對話。通過小組合作，討論描述水循環過程。最后通過造句推廣運用句型。
3.情感態度價值觀：
培養學生樂于探索的科學意識，增強英語和生活的聯系。
教學重難點：
重點：學生能夠聽、說、讀、寫“where does the rain come from? it comes from the clouds”。并能替換運用于水循環的整個過程。
難點：學生能夠將這個句型運用到生活中，培養學生樂于探索的科學意識。
教學準備：詞卡、幻燈片、水循環實驗器具。
教學過程：
step 1.warm up/review
1.let’s sing a song<little water drop>.
2.free talk.
t: where do you come from?
where does yao ming come from? …
3. read the words quickly.
step 2.presentation
(1) .t: do you know how water cycles? first the sun shines and the water becomes vapour. the little water drops go up together and become a cloud. at this time, they are heavy. so some of them fall down into a river or lake. the sun comes out. this is the water cycle.(教師邊說邊在黑板上畫圖演示)
(2)experiment
t: can you make rain use these things? let’s do an experiment.(讓學生來試著來降雨，演示雨的形成過程)
學生利用酒精燈給燒杯里的水加熱，水蒸氣蒸發，遇到玻璃凝結成小水滴，小水滴越變越大，最后由于重力降落下來。在演示過程中，教師引導學生觀察。
用酒精燈給水加熱：
t:how can the water become vapour?
ss:heat up the water.
t:oh, the fire is hot.what does it like?
ss:it likes the sun.
t:how can the water become vapour?
ss:the sun shines and the water becomes vapour.
當水蒸氣明顯上升的時候：
t:what is it?
ss:it’s vapour.
t:where does the vapour come from?
ss:it comes from the water.
ask and answer. group by group.（在水蒸氣繼續上升的過程中，組間練習對話。）
水蒸氣附在玻璃上，凝結成水滴，在玻璃上放上云的圖片：
t:look, these are clouds.where does the clouds come from?
ss:it comes from the vapour.
小水滴變大滴下來：
t:oh, what’s this?
ss:it’s rain.
t:where does the rain come from?
ss:it comes from the clouds.
t:good job! you are successful!（做勝利的手勢）
(3) learn the dialogue on page 71.
教師出示自學習題,學生自學并試著回答問題.
(4) read and answer.
(5) listen and repeat.
(6) write the dialogue on the exercises books.
step 3 consolidation
(1)draw and say
t:four in a group.draw a picture to tell how water cycles.
s1:where does the rain come from?
s2:it comes from the clouds.
s3:where does the clouds come from?