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Step1: Lead-in
Lead-in by showing the picture of my babies,ask the students to observe,they are twins,so they look like each other.Why they look like each other? The secret is--DNA.
Step2.New words learning
Read the new words in this lesson after the radio.
Step3.Learn something more about DNA.
(1) .What do you know about DNA?
(2).What can scientists do with DNA?
Step4.Listening
Listen to the tape and fill in the blanks.
Finish the task in class orally.
Step5. Reading
Read the lesson and answer the questions.
Step6. Language points
To explain the important and difficult points in this lesson.
Step5. Practice
Do some exercises.
Step6. Summary
Summarize the important words,phrases and sentence patterns.
Step7. Homework
Search the Internet for information about changing the DNA of the food we eat and write down your ideas.