一、Teaching Objectives教学目标:By the end of the lesson,the students will be able to:1. learn how water travels in natural environment and how to clean up water2. learn some new words 3. realize how precious water is and do their best to save water 二、Teaching procedures教学过程 StageInteractionActivities PurposeI. Pre-readingTS(individual work)T : Ask some questions about water Ss: Have a free talk about water To elicit the topic of water and arouse Ss interest