The Fourth Period—Section B(2a－2e)
Teaching Important Points 【教学重点】
Key words & phrases：
gate，bottle，president，work，metal
throw away，put sth. to good use，pull…down，bring back
Key sentences：
1.Have you ever thought about how these things can actually be put to good use?
2.Nothing is a waste if you have a creative mind.
3.He is known for using iron and other materials from old cars to make beautiful art pieces.
Key structure：
Review of the tenses.
Teaching Difficult Points 【教学难点】
★Understand prefixes and suffixes.
Teaching Aids 【教学工具】
A tape recorder，CAI or multimedia courseware.
Teaching Steps 【教学过程】
★Step 1 Leading in 【新课导入】
1．Greeting
2．Review
Ask students some questions：
What can we do to help save the earth?
Have you ever recycled books or papers?
★Step 2 Cooperative inquiry 【合作探究】
1．Finish the task in 2a
①Work in groups.Look at the title and the pictures in 2b.What is the passage about？Can you guess？Discuss in groups and prepare the new words for the coming reading.
②Ask individual students to talk about this.The teacher gives suggestions.And lead to the reading.
2．Finish the task in 2b
①Ask：what can you see in the pictures？What is it/are they made of？Do you think it's a good way to protect the environment？While talking with the students，the teacher can present new words and expressions.
upside down，iron，work，metal，creativity
②Read the paragraphs quickly and understand their main ideas.
③Read the passage again.Finish the chart in 2b.And underline the sentences in the passage.
④Check with the class.
3．Finish the task in 2c
①Read the phrases in the box in 2c.Then find them in the passage.Learn their meanings.
②Read the sentences in 2c and understand them.Finish the task of filling.Get the students to read out the complete sentences and check their work.
4．Finish the task in 2d
