SOCCER

10 yards x 10 yards in which players form circle.  They can go outside the grid a foot or so but the idea is to keep the circle shape and not make the circle larger.

Sliding rondo is simply rondo with a player who can slide into the middle and help keep the ball with the rest of the team. 

The middle player can either stay the entire time or take turns sliding in and out of the middle at any time.  I like having the middle player sliding in and out as another player takes his spot in fluid motion without the game being stopped.  It adds another layer of complexity and teamwork to the exercise.