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【能力目标】
Improve the students’ ability of speaking, listening, reading and writing. Understand the articles about DNA.
【情感目标】
Know more about the nature, know more about our body. You are unique in the world.
【教学重点】
To master the compound sentences.
【教学难点】
To master the use of DNA.
课前准备
Tape recorder, Multimedia
教学过程
Step 1. Warm-up
Free talk: (show the picture of DNA, tell students DNA is short for deoxyribonucleic acid.)
Think about it!
1. What do you know about DNA?
2. What can scientists do with DNA?
Step 2. Presentation
Free talk:
Where is it in our body? (Show some pictures of DNA.)
What's the function of DNA? (Show some pictures of twins.)
2. Explain the new words.
3. Read the lesson and answer the questions：
(1) What is a blueprint?
(2) Which is more complex, building a living thing or building a house?
(3) Do some twins have the same DNA?
(4) Is it possible to change your DNA?
(5) Whose DNA is related to yours?
4. Check the answers and underline the key words.
5. Listen and follow to the tape.
6. Explain the language points: