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难点：能理解课文内容，尝试复述课文，并能尝试提出建议并说明原因。
教学步骤
Step 1 Warm up
1. Enjoy a song “Heal the world”
T: What’s the song about?
S: The Earth
2. Free talk
T: What’s in its body? 教授oil和coal
Look at the picture. The Earth in1996 and in 2016 are different. Look at this part. It is green. That is brown. The Earth is crying. Why?
S: The river is dirty. There is a lot of rubbish….
T: So, we should protect the Earth. (导题)
Step2. Story time
1. Watch and answer
How should we protect the Earth?
S: Save water, save energy, save trees and don’t use too much plastic.
2. Read and underline
Why should we save water? How should we save water?
教授useful, too much, waste water, reuse water
3. Listen and judge
Most of the energy come from coal and oil.
1) There is a lot of coal and oil on Earth.
2) We should drive cars every day.
3) Cars use a lot of energy
4. Read and find
自读最后两段，找出不会的生词。学习wood, cut down, plastic
Read act choose
选择任何一个部分，表演save trees; 或者对plastic 部分进行辩论
6. Listen and repeat.
7. Let’s retell.
Step 3 Consolidation