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c. Aims of emotions.
1.At the end of the class, the students will be able to understand that “ We should protect the earth” because earth is our mother.
2.At the end of the class, the students awareness of “protect the earth” should be aroused and do it in our daily life.
Focus of the lesson and predicted area of difficulty教学重难点：
1. At th end of the class, the students will be able to understand the sentences” We should and We should not” and can use them to express their opinions about the earth.
2. At the end of the class, the students will be able to retell one of the stories.
Preparation教学准备：
PPT, books, teaching plans.
Teaching procedures教学过程：
Step 1. Warm up
T :Good morning, boys and girls.
S: Good morning, Miss/Mr..
T : I have lots of hobbies, can you guess what are my hobbies?
S: Do you like singing?
T: Yes, I do.
S: Do you like swimming?
T: Yes, I like swimming very much.
S: Do you like playing games?
T: Yes, I do.
T: But I like one thing best, guess.
S: Do you like…?
T: Yes, you’re so clever, I like riding bikes best, but why/
S: Because I think it’s very healthy.
T: Yes, because it’s very “green”(PPT presents the picture of Pm.2.5)
T: why should we ride bikes?
S: Because of the PM2.5
Step 2 .Presentation
T: Yes, the PM2.5 is so heavy, now let’s watch a video called”Our home”, please watch it carefully and tell me what things can you see in this video?(play the video)
S: I can see some animals, they’re in danger.
S2: I can some air pollution