【正文】
eaching Aid: some slides。 train students to take personal action to reduce pollution. Learning Methods: Listening。 grasp the main i dea of the text A slide Step5: diagram[ paper plastic metal glass Learn the usefu l expression for paring quantities: There is more… than… … .is the most A slide Step6: carefulreading Try to find the key words Improve students’ reading ability A Slide(pictures) Step7: Retell the text with the key words Practice Ss’ speaking。 A tape recorder