HELP!my skool P.E is about athletics this term..HOW?

Im doing athletics this term with my PE cl, but the thing is, the teacher is making us do 1500 metre's running. which is 5 times around our oval. weve only just strarted thou and i was like last to finish! i want somethings that will help me run better/faster.any stats would be good on how to run properly with out getting puffed easily and not stoping to walk to easily.PLEASE HELP :'):"):)"):):)":)":):)thx