Begin this drill by having the students from a large Excellence Circle.
Instruct all of the students to perform a combination like an up block to a reverse punch while stepping out into a forward stance in the center of the circle.
Have the students look at the person in front of them and try to out perform that person and also try to be the best performer in class.
Next change the drill to have a little fun. Have only the two students facing each other in the circle step out to do the combo. Then each person to their right will execute the combo, and so on as the make a dual circle around the room.
This will help make the drill exciting. Paint the picture that they are on a demonstration team and this is part of a big performance.