Reading and writing--What can we do about globle warming   ( B6 U4 ) 

Step1   Lead in  (show a small video about the experience of Ouyang Guang)

Step2   learning procedures

           1)find two different opinions of  Ouyang Guang and Earth Care about globle warming

           2)fill in the blanks using the details in the second letter

           3)task--write an article or design a poster in groups to appeal to more peple to take action to reduce globle warming

Step3   show  time

Step4   conclusion