九年级英语下册10课教案冀教版.doc

Lesson 10: What is DNA?
一、Teaching Aims
1.Vocabulary:
Mastery words and expressions: generally, twin, clone, not only…but also
Oral words and expressions: blueprint, identical, egg, identify
2. Know how to write a passage on science.
3. Learn something about DNA.
4. Know more about our body.
二、Teaching Important Points:
1. Master the words and expressions of this lesson.
2. The ability and inability.
3. The use of coordinating conjunctions.
三、Teaching Difficult Points:
The use of DNA.
四、Teaching methods
设定情景来教授重点句型，然后让学生巩固练习。
五、Teaching aids
录音机、多媒体课件
六、Teaching procedures
Step1.Lead in the text by discussing what DNA is. Divide the class into several groups. Then talk about the subject for several minutes. Then one of the groups presents their opinions in front of the class.
Step2. Listening task:
Listen to the tape and fill in the blanks with the correct words you hear.
1. Generally speaking, a ______ is a drawing.
2. ______ for identical twins, each living thing has its own unique DNA.
Play the tape once. Then let the students try to finish the task in class in oral.
Step3. Reading task:
Read the text quickly and answer the following questions:
1. Where does your DNA come from?
2. Is your DNA in every part of your body?
Finish the reading task in class in oral. Try to get more information about the text at the same time.
Step4. Read the text again. Find the sentences with the new words. Try to create situation about the new words. Then make sentences with the new words. If someone can make a whole story with the new words that we learn in this lesson, the teacher must encourage her.
The sentences with the new words:
Generally speaking, a blueprint is a drawing.
Identical twins are two children that grew from the same egg.
They are clones.
From your DNA, scientists can identify not only you, but also people related to you.
Step5.Let some students tell some details about the text.
What is DNA?
Where is your DNA from?
What is DNA used for?
Step6. Come to “LET’S DO IT”.
Finish the task with a partner. Find the things about you that show your parents’ DNA. Talk about if for a while. Then let some volunteers come to the front to talk about the subject.
Step7.Homework
1. Finish off the exercises in the activity book.
2. Go on the next reading in the student book.