Unit 5 Lesson29 DNA—The Story of You教学设计冀教版九年级英语全册

Lesson 29: DNA — The Story of You
一、Teaching Objectives
Language Competence:
Students can master the new word, understand the passage about DNA, and express ideas about DNA’s functions and mysteries in English.
Cultural Awareness:
Students learn about the importance of DNA in life science, develop an interest in biological research, and understand the significance of genetic inheritance.
Thinking Quality:
Students can analyze the passage, raise questions about DNA, and think critically about the impact of DNA research on human life.
Learning Ability:
Students improve reading comprehension, note-taking, and group discussion skills through interactive activities.
二、Teaching Key and Difficult Points
Key Points:
Master the new word and understand the main content of the passage about DNA.
Difficult Points:
1.Explain DNA’s functions (e.g., determining traits, genetic inheritance) in simple English.
2.Discuss the implications of DNA research (e.g., health, identity) logically.
三、Teaching Methods
Task-based Language Teaching (TBLT)
Reading and Discussion Method
Visual Aids Method
四、Teaching Aids
PPT
五、Teaching Procedures
Step1. Warm-up
- Greeting: "Good morning, class! Have you ever wondered why you look like your parents Let’s talk about it."
- Questioning: Ask, "What do you know about DNA Do you think it’s important "
Step2. Presentation
- New Word Teaching:
general adj ．一般的；普遍的→ generally adv .-般地；广泛地；普遍地 generally peaking "大体而言；概括来说"→ general n ．将军；上将→ in general 总之；大体上
repeat v ．重复；复述；背诵→ recite v .背诵
grandson n ．孙子；外孙 granddaughter n .孙女；外孙女
instruction n ．指示；说明（常以复数形式出现）
- Let students read the word aloud and make their own sentences.
Passage Introduction:
Introduce the concept of DNA as the "blueprint of life". Ask,
Why is DNA called the blueprint
What do you think is fantastic about it "
Step3. Reading
First Reading:
Let students read the passage silently and answer: "Where does your DNA come from " (Your parents.)
Second Reading:
Read the passage paragraph by paragraph. Explain key concepts, such as "unique DNA", "genetic inheritance", and DNA’s role in health and identity.
Questions:
- Why is DNA compared to a blueprint
- How does DNA influence you before you are born
- What can scientists do with DNA to help with health problems
Step4. Practice
Let students work in pairs to summarize the main points of the passage. Then invite some pairs to share their summaries.
Step5. Production
Group Discussion: Divide students into groups to discuss:
What other mysteries of DNA are you interested in
How do you think DNA research will change our future
Each group presents their ideas.
Writing Task:
Let students write a short paragraph titled "My Thoughts on DNA", sharing what they find most amazing about DNA .
Step6. Summary and Homework
- Summary:
Recap the new word "fantastic" and the main content of the DNA passage.
- Homework:
- Review the passage and new word.
- Interview your parents or grandparents about family traits (e.g., eye color, height) and write a short report about how these traits might be related to DNA.