On every level of play the five players of each team consists of two guards,one center,and two forwards. The basic rules are the same with a few minor variations. At the professional and college level, shot clocks are used, giving the offense a certain number of seconds to at least touch the rim of the basket with the ball. High School teams separate their time into four eight minute quarters. The NBA uses quarters as well, however, their quarters are twelve minutes long.
Colleges use two twenty minute halves.
Women have their own variations. For example, our ball is smaller and our college shot clock is thirty seconds long. But on every level the basket is ten feet from the floor and the foul line is fifteen feet from the basket. Although the game of basketball consists of many shots, the free throw is the shot that takes the most skill and concentration. Seventy percent of free throw shooting is mental concentration.