Unit 4 When was it invented?  

unit 4 when was it invented?  section b

知識目標： after learning the text, require the students to master the phrases below  
(通過學習，掌握下列詞語)
invent, popular drink, by accident, not…until, discover, according to, chinese legend, boil, an open fire, fall(fell) into, remain(ed), notice(d), produce(d), in this way
能力目標：1.practice the students’ listening ability. (聽力訓練)
2. ask the students to understand the passage very well and answer some
questions according to the passage.
(能夠正確理解本文含義，回答相關問題。)
            3. useful phrases for the students to retell the new text.
(利用關鍵詞語，能夠復述課文大意。)
情感態勢：train the students to use their heads and make some inventions in life.
(開動腦筋，培養發明創造能力。)
學習策略：1.chips’ history (a foreign invention) →tea(chinese invention)
2.work in groups and solve problems together
教學流程：
step 1  words revision
dictation:______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
step 2  a listening test
the history of  potato chips
      ① _____________________that potato chips were invented by mistake?
potato chips ②_______________by a chef called george crum. they were invented in
 ③__________ .george crum cooked them for a long time until they ④__________.and he sprinkledlots of salt on them so they were ⑤__________.
step 3 work in groups,read through the passage,and then answer some questions.
step 4 find out the following points:
1.although __________________________________________________________________
eg.用although/though 或bu t填空
 __________ he is very old, he still works hard.  he is very old, __________ he still works hard.
2.over在本文中的2種解釋
①________________    100多年前______________      同義詞_____________
②________________    河上的一座橋________________
3….. three thousand years , thousands of
具體使用:________________________________________________
拓展：hundred, million
4.被動語態的使用（找出本文含有被動語態的句子，4個）
①___________________________________________________
②____________________________________________________
③____________________________________________________
④____________________________________________________