Gauge your remarks, time-wise, by how people are reacting to you. It doesn't take a speech genius to tell when the audience has tuned you out. Most places publicize the speaker, and that helps, but young people often have a short attention span. Be on your toes for that. Try to teach one lesson It has always been my philosophy that I like to teach the audience one athletic lesson.
Some speakers enter the fray with entertainment in mind.
That's well and good, but people, including kids, should come away from your speech feeling like they got something out of it. You, as speaker, need to focus on a general theme that relates to your audience. Add your own experience to doll up your speech. If, for example, sportsmanship banners were handed out at the affair, punctuate your remarks with the significance of that type of award. Sometimes, on your feet, you have to be like the quarterback in football who calls an audible at the line of scrimmage.