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(共23张PPT)
Unit 5 The Power of Plants
Developing ideas (1)
英语外研版七年级上册
通过本课时的学习，学生能够：
1. 通过听，获取与梳理与“墨西哥玉米”相关的事实性信息；
2. 掌握双元音/e /、/a /和/ /的发音技巧。
3. 归纳表示“询问和给予许可”的相关表达，并在谈论植物用途的对话中准
确应用；
4. 意识到玉米在墨西哥文化中的重要意义，从而理解植物在生活中的重要性。
Learning objectives
重点
重点
Free talk
1. What plant can you see in the pictures
2. How do you usually eat them
corn
wheat
rice
Do you know what the world’s top three good plants are
Rice, wheat and corn.
Think and learn
Knowledge card
DID YOU KNOW
East Asia: rice noodles
Europe: bread
Americas: tacos
Do you know what is a taco
It’s a rolled corn filled with meat, vegetables and other fillings.
It’s a traditional food in Mexico.
Think and learn
Look and predict
The boy in the blue hat is Jason.
1. Where is Jason
2. What’s in his right hand
3. What is he doing
Listen and choose
Listen to the opening of the vlog and choose the main idea.
A. It explains the importance of corn in Mexico.
B. It compares corn in different countries.
C. It describes a famous Mexico corn dish.

Listening skills:
Circle the key words in the options to predict before listening.
Predict and learn
num.
num.
num.
Listening for numbers：
When listening for numbers, pay attention to words and expressions like nearly, about, over, and more/ less than. They usually come before numbers.
Learning to learn
Predict what you’ll fill. Pay attention to the words nearly, about and over.
Listen and complete
Listen again and complete Jason’s notes for the vlog.
40
9,000
cooking
600
food
Read and summarize
huge size
long history
rich food
part of culture
What do you know about corn as a food plant now
Role-play
The school will hold a cultural festival. Student A acts as the interviewer. Student B acts as the Mexican student. Make a conversation to get information about Mexican corn, including its history, size and food, etc.
Can you introduce the corn in Mexico
Sure. The corn in Mexico has a long history...
Read and learn
The boy in the blue hat is Jason.
/ d e s( )n/
He is making a video for Amazing Plants.
The size of the corn in his hand is very big.
/ me z /
/sa z/
The taco is a famous Mexican corn dish.
/ fe m s/
/b /
/ me k /
Listen and repeat
/e / make cake great taste
/a / buy try light high
/ / enjoy oil coin joy
1. What are the parts of an ear of corn
2. How do people use each part of corn
Look and think
corn seeds
corn silk
corn husks
food, feed(饲料）
tea, medicine
handicrafts(手工艺品)
Listen and answer the question.
Listen and answer
What’s the main idea of this conversation
It talks about the different uses of corn.
Listen again and complete the sentences.
Listen and complete
make
tea
good
traditional
Without corn, there is no country.
How do you understand the Mexican saying:
Listen and discuss
Corn has a long history in Mexico.
It is a very important food in Mexico.
It has many uses.
It’s not only food but also part of Mexican culture.
Plants are important!
Jason: Can I try the taco
Jose: Sure.
Jason: Yum! Are tacos a traditional
Mexican food
Jose: They are! We make them from
corn seeds.
Jason: Is this beef inside
Jose: Yeah. You can put almost
anything in a taco! Now try these
chips. We make them with corn
seeds, too.
Jason: Oh, what’s that
Jose: It’s corn silk tea.
Jason: Corn silk
Read and circle
How does Jason ask for permission
Jose: It’s the “hair” of corn. People in
many countries make tea with it.
It’s good for your health. Try it!
Jason: It’s sweet. Oh, what are these
Silvia: They’re traditional dolls. We make
them with corn husks.
Jason: So colourful! May I take a video
of them
Silvia: Certainly!
Jason: Corn has so many uses. This is
amazing. There’s a saying in
Mexico: without corn, there is
no country. Do you agree
How do Jose and Silvia give permission
Are they polite or not
Summarize and learn
Asking for and giving permission：
Asking for permission helps us get something in a polite way. We can use the questions May I ... or Could / Can I ... People can reply Certainly, Sure or Go ahead.
Learning to learn
How do people ask for and give permission
Can you give more examples
Choose and think
Work in pairs to choose one of the plants and think about three ways of using it.
Rose Cotton Bamboo
Uses of ________:
1. ________________
2. ________________
3. ________________
Example:
A: Could you tell me about bamboo
B: Of course. We use bamboo for food.
A: Yes, that’s true. I often eat bamboo shoots
with noodles.
B: We also use bamboo as a building material.
You can build houses with it.
A: That’s interesting! May I ask you for
another use
B: Yes, no problem. You can make paper from
bamboo.
A: Thank you! Bamboo is a very useful plant.
Make and role-play
Make a conversation about its uses. Then act out your conversation in pairs.
Could you tell me ...
Of course.
Try to ask for and give permission.
Summary
After learning this lesson, I can
...
1
2
3
get the information about corn in Mexico.
ask for and give
permission politely.
tell the uses of plants.
Ask for and give permission:
May I ...
Could /Can I ...
Sure./Of course...
... use... for...
... use... as...
... make ... from ...
Homework
1. Choose a plant and make a poster about its uses.
2. Preview What’s your cup of tea.

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