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标Knowledge aims：
1. 能根据音标，正确朗读出单词表中的黑体单词：
thick, ground, wet, cover, forest, earth, surface, control, die, wood, protect
2. 能正确拼读并运用黑体单词：
thick, ground, wet, cover, forest, rainforest, earth, surface, control, die, wood, protect
3. 能正确使用“比较级and比较级”的形式。
Skill aims：
1. 能基本听懂本课文本材料及简单的环保倡议书。
2. 能正确地口头介绍森林带给我们的好处，并建议大家保护环境。
3. 能正确朗读课本的文本材料，并能读懂相关的文本材料。
4. 能写一份简单的有关环保的倡议书。
Emotional aims：
通过对热带雨林的学习，加深学生对森林的认识，教育学生从自己做起教学重点
1. 复习形容词比较级。
2. 学习热带雨林的相关知识。
教学难点
1.熟练应用形容词的比较级和最高级。
2.比较级and比较级的用法教法
学法任务型教学，合作探究法教学准备多媒体教学过程设计意图Steps:
Ⅰ Warm up
Lead in the new words “forest, rainforest” according to the short movie.
Answer the question :What can we get from rainforests?
II. Read through the passage for the first time.
Give students 5 minute to read through the passage quickly. Remind students to find the new words.Try to pronounce the new words.
Help each other.Can ask for the teacher for help.
III. Learn the new words.
Ask the students to say the words and write down these new
words . And teach the new words by explanation and flash, giving the same meaning words.
IV. .Read through the passage for the second time.
Read through the passage and underline some difficult points,phrases and the sentences.