Skateboarding excellent,fantastic teacher, Billy！

After school, some people are going in to the gym class. Their coach is Billy, which is a master at skateboarding. What they first do is to warm them self up, like stretching because the most popular injuries are the sprained ankles and sprain risks. Also, billy make sure that everyone wears a   safety gear. Next is the drills. And  for the last 20 minutes, they got their chance to free skate. The reason for that is they can copycat each other, and they'll improve their own skating skills. The students all agree that Billy had helped them sharpen their skills. Billy's great.