Leadership is everywhere, you can be a leader basically anywhere you are. Where I usually see leadership and where I use it the most is at school. Athletics is where teammates need leadership the most. I help my teammates fight through whatever it is they are doing. Like for example they can be running the big loop around the school, or running the track. If I see somebody somebody walking or giving up, I try to encourage them to keep running, instead of slacking off.
You see leadership can make a normal team become a great team. For example leadership cuould even be used at your own football game. If one of my teammates does a bad play I tell them to keep their heads up, and that they can do better on the next play. You never notice but leadership at school, and at sports can rely make a difference.