冀教版八年级下册 Unit 2 Lesson 8 Why Are Plants Important? 教案

Unit 2 Plant a Plant!
Lesson 8 Why Are Plants Important
LESSON PREPARATION
LANGUAGE KNOWLEDGE 掌握词汇：basic
接触词汇：pleasant, shade, fufill, soil
短语和句型： It's pleasant to do., take energy from..., in a word
RESOURCES
audiotape small plants or pictures of plants large pieces of paper
LESSON STRUCTURE CLASS OPENING
Greeting
Greet the class.
Say: Hello, class. Good to see you. Let's get started with today's lesson.
Review
1)Homework check.
2)Choose some students to present their news report: "Save Our Trees and Forests".
3)Review what you learned in the last lesson. Teacher: What did we talk about last class
Students: We talked about planting trees and saving our forests.
Teacher: That's right.
KEY CONCEPTS FOCUS STRUCTURES:
It's pleasant to walk in the forest.
Trees and other plants are important to people. They help us fulfill our basic needs.
The trees and plants take energy from the sun and turn it into food.
STEP 1: Present
CLASS WORK: Discussion
1)Discuss the Think About It questions as a class. Bring in some plants or pictures of plants that grow near your own home and present them to the class. Teacher: Here are some plants that grow near my home. This plant is called
and this one is called
What plants grow near your home Ask several students to respond. You may ask the students to come to the board and write down or draw a picture of the plant.
Teacher: Why do we need trees
Students: We need trees because... they give us clean air to breathe/they give us food to eat/they give us wood to build houses with/etc.
Teacher: Right. Trees and forests provide us with many things we need to live. They give us many of the things we need to fulfill our basic needs.
Write the words basic needs on the board. As a class. make a list of basic human needs on the board. Teacher: A basic need is something we can't live without. We need it to survive. For example, oxygen or air is one of our basic needs. We need to breathe air to live. Can you name some of our basic needs Students: Food/water/shelter (i.e. a home and clothes)/sleep/etc.
Teacher: Well done. Plants provide us with many of our basic needs. That's why they are very important to us and all other animals on the earth.
Write the phrase be important to... on the board. Explain. Students should master this phrase.
Teacher: Now let's read the lesson and find out more about how plants help us. Let's see what Jenny. Danny and Brian have to say about it.
STEP 2: Read
GROUP WORK: Let's Do It! No. I
1) Instruct the students to read Lesson 8 and complete the exercise in groups of three. While they read, ask the students to write down a list of all the reasons why trees and forests are important that are mentioned in the dialogue.
2)Discuss the answers as a class and have the students share their list of reasons with the class. Write the phrases It's pleasant to do... and take energy from... on the board. Explain. Students should master these phrases.
STEP 3: Apply
GROUP WORK: Applying knowledge
1)In groups, ask the students to make a chart or diagram that shows how trees and other plants help satisfy our basic needs. There is no template for this task. Encourage the students to be creative in the way they present the information. They should include pictures or drawings in their chart or diagram.
2)Ask each group to present their chart or diagram in front of the class.
STEP 4: Task
PAIR WORK: Let's Do It! No. 3
1) Instruct the students to work in pairs to discuss why we need plants and fill in the mind map.
2)Then have each pair compare their mind maps with another pair of students.
3)Ask the students to share their answers with the class and fill in a large mind map on the board.
CLASS CLOSING
1)Complete Let's Do It! No. 2.
Students do the exercise independently, then check the answers in groups, and finally as a class.
2)Role-play Lesson 8. 3)Assign homework:
A World Without Trees: Write a short story about what life would be like on the earth without trees. Be creative and come up with an interesting plot and characters. Your story should have a beginning, middle and end. Consider the following questions: o What would be the same/different
o Would life be better or worse
EXTENSION
GROUP WORK: Communicate It
Play Communicate It to review vocabulary, phrases and concepts from this unit.
1)In small groups, students write new words or phrases on separate slips of paper.
2)Instruct the students to fold all the slips of paper and place them in a hat or some other container. No slip of paper should have the same word or phrase on it.
3)Player I picks a slip of paper and tries to get the other players on his or her team to guess the word or phrase by describing it. The person describing cannot say the word or phrase on their slip of paper. If they say the word or phrase their turn is over and Player 2 picks a new word or phrase to describe. 4)Put a time limit on this game. The group to guess the most words within the allotted time wins.
**Note: To make the game easier, students may explain some things in Chinese, but they may not say the Chinese translation of the word or phrase. You may also choose to allow students to use a dictionary.
For Example:
Player 1: (Word=air)We need it to live. Group: Is the word "water"
Player 1: No. We breathe it. Group: Is the word "air" Player 1: Yes!
LANGUAGE NOTES
1. Trees and other plants help clean the air.树和其 他的植物有助于净化空气。
help(sb.)do/to do sth.意为“帮助（某人）做某事”。 此外，help sb. with sth.也有此意。例如：
Can you help me(to) learn English Can you help me with my English 你能帮助我学英语吗？ Sunglasses help(to) protect your eyes from the sun. 太阳镜有助于保护你的眼睛免受阳光的伤害。
2. The trees and plants take energy from the sun and turn it into food. 树木和植物从阳光中吸取能量， 将它变成食物。
turn.into.意为“把···变成···”，与 change. into.近义。例如：
The heat turns the ice into water.热量把冰变成水。 Time flies! It has turned the little boy into a big man. 时光飞逝！它把这个小男孩变成了一个大男人。3. Medicine and clothing are also made from trees and plants.药品和衣物也是由树木和植物制成的。be made from.意为“由···制成/构成”，一 般指看不出原材料，与be made out of..近义。be made of.表示“由···制成/构成”，一般指看得出来原材料。例如：
The paper is made from wood.纸是树木制成的。 (看不出原材料)
The table is made of wood.这张桌子是由木头制成 的。（看得出原材料）
注意：口语中也有混用的情况。
4. Plants also make everything look beautiful.植物 也使一切看上去很漂亮。
make + 宾语 + 宾语补足语 do 表示“使/让某人做某事”。其中宾语补足语是不带to的动词不定式。例如：
His jokes made us all laugh.他的笑话把我们都逗 笑了。
You should speak more slowly to make everybody understand you.你应该讲得再慢些,使大家都能 听明白。