Unit 6 I often walk to schoolTeaching goals(I)Knowledge and ability goal:grasp the words ,expressions and sentences.Words and expressions :walk,by bus, by train, by taxi, on foot;Sentences:How do you go to school?I often/usually/sometimes go to school by bus/car/train/bike/taxi;I often walk to school=I often go to school on foot;(II) Process and way goal :situation teaching and pk happy learning(III)Emotion and altitude goal:develop the consciousness of green goingTeaching important points:grasp the expressions: by car, by bus, by train, by taxi, by bike, on foot and the sentences correctly---How do you go to school?---I often/usua