Lesson 29 DNA — The Story of You教学评价实录

[来源:Z&xx&k.Co

Lesson29: DNA- The Story of You

LiuXiya

Teaching aims:

1: words and phrases.

2: Improve the Ss' ability of reading , understand the text

about DNA.

3:Know about the nature, science, and our body.You are

unique in the world.

Important points: words and phrases

Difficult point: Attributive clause

Teaching procedure:

Step1. Greeting.

Step2.Lead in : Look at the pictures,then watch a video

about DNA.

Step3.Review the words and practice.

Step4.Listening: Ask the Ss to listen to the tape, then

answer the questions: What is DNA? How is DNA?

Step5: Reading : Read 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?

Step 5. Careful-reading part2:

Why is DNA fantastic?

Step6: Language points:

Watch a video about language points

Step7: It’s time to practice.

Step8:Free talk: Is it a good idea to change the DNA of

the food we eat?

Step9: Summary: We all know.

Your DNA comes from

your parents. You have your own unique DNA, but it

repeats patterns from your parents’ DNA. From your

DNA, scientists can identify not only you ,but also

people who are related to you , Your parents and

grandparents are related to you , and you have their

DNA. When you have a grandson or granddaughter, he

or she will have your DNA.

Step10: Homework

1.Write the composition down in your book.

2.Finish Let’s do it3.

3. Read the text three time at least.

Blackboard-writing:

Lesson29:DNA-The Story of You

is a blueprint of life.

in general

DNA

1.unique. except for

2.healthy

Changeable. be able to

is fantastic.3.same. the same…as

4.related. be related to Billions of…