How can i add some more distance to my triple jump?

This is my 1st year of track and my coach asked me to try it during the last half of the season, so i didn't really get alot of time to get better, i just time to learn it. my best distance is 23.1 1/2. I know, its not that good, so how do i get better?|||Well, practice is the only thing I can think of and maybe try to find some outside help, like a parent or a professional trainer. Go to the gym.. Sorry, I can't be more help