When I was in high school, varsity cheerleaders "lettered" in the sport just like the Varsity football, basketball, track, baseball, etc., team athletes. This was the late 1980's. As a varsity cheerleader we had to pass a test on the rules, terminology, and referee signals for each sport before we could cheer at games. We were there to cheer for the team and players as encouragement, the primary function for us was to get the crowd involved: to lead them into cheering on the team. The dance routines to the songs the band played, the gymnastics, stunts, and pyramids, etc. was to entertain the crowd during delays in the play of the game. Competition cheer teams are entirely about performance. Game cheerleaders should focus on the game, players, and getting the fans involved with the game and its team.