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二.教学重点和难点
1. 教学重点
句型：We use water/ plastic/ wood/ …to…
…come(s) from…
We should…
We should not…
词汇：protect, Earth, save, useful, waste, reuse, energy, come from, coal, wood, cut down, too many, plastic
2. 教学难点
句型：We use water/ plastic/ wood/ …to…
Step1: Pre-reading
1. Lead-in
T: Good morning, boys and girls.
T: （地球的介绍，引入coal and oil，并学习）Most of our energy comes from coal and oil.
T: Who’s she?
Ss: She is the Earth. （学习the Earth）
T: What’s on Earth?
Ss: …
Step2: While-reading
1. T: The Earth gives us water, energy, plastic, coal and oil. （学习plastic）
And the Earth is crying. What should we do?
Ss: We should protect the Earth. （引出课题）
2. T: today we’re going to learn Unit 7 Protect the Earth.
T: How can we protect the Earth? （观看Story time）
Ss: Save water; save energy; save trees; don’t use too much plastic.
3. T: What do we do to use them?
Ss: （think and choose）We use … to …
（板贴，并朗读，并引出useful,学习该词）
4. About Pra1:
（1）听录音，学习place, waste, reuse；
（2）齐读；