Can someone tell me how to play?

So today I was tricked into playing a "staff vs. students" basketball game. As in, I came with my class to watch and they said, hey, you have to play or we won't have a five people. "Why me?" I said. "You're young" they said. This is often thier explanation for asking me to do things, and it's true. There are only about three people that work here that are under 40, and the other two were already playing, in fact, the other two coach basketball. I did alot of running back and forth, and somewhere in the middle on the first quarter I said to myself, "Gee, why do they assume that I know the rules of this game. Could someone not have taken the time to give me a refresher?" By refresher, I mean, I need to be told the rules because seventh grade was a long time ago. I did alot of laughing, and I realized that seventh graders have alot more energy than I do, even at 28. In the end we won, all because of me, I'm sure!
Have a great weekend!