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教学环节：
Pre-task:
Lead in:
Begin the class with a chant:
Look at the shirt.
It's made of cotton.
Look at the ring.
It's made in Japan.
Look at the zipper.
When was it invented?
When was it invented?
In 1893. In 1893.
Who invented the zipper?
Who invented the zipper?
By Whitcomb Judson.By Whitcomb Judson.
While-task:
Show the task to the Ss:
科技节要到了，学生会举办“我是小小发明家”的英语手抄报大赛，请以“The most useful invention that I design”为题，做一份海报。
要点如下：
(1)introduce your invention
(2) Why do you make it?
(3)What's it used for?
(4)字数要求不少于80词。
2. Play flash game: show some pictures to Ss as quickly as possible, Ss stand up if they know what invention it is
3. Practice the target languages:
(Give some key words and phrases for Ss to help them make sentences
E.g. (1)Bell; 1876, be invented in/by
(2)bamboo, ask for help, be made of/from/ be used for
(memory test: give Ss 30’ to recite the following sentences:
(1)The sky lantern allows people to ask for help when they are in danger.