Take One and Trade One

I was in gym class with my grade 7's the other day and the gym teacher had them play an interesting game to get them to run laps, do sit ups, push ups, burpies, etc... I can't recall exactly what it was called but it was something along the lines of "take one leave one".  Basically, the gym teacher divided the class into 4 groups and each group would send a representative from their group to the center of the gym for the different rounds.  The gym teacher stood in the center of the gym with a deck of playing cards.  Each student took a card and looked at it... the number revealed how many of that exercise their group would have to do.  However, sometimes he would tell them to switch cards and so everyone had to switch cards with someone else in the middle of the gym not knowing if they would get a "better" (or lower) number or not.

Anyways, the game worked well and had everyone running laps and exercising.  He ended up doing it the entire class but I could see it even being used as a warm up.